test-js: Use prettier and format all files

Libraries/LibJS/Tests/.prettierrc

@@ -0,0 +1,13 @@
+{
+  "arrowParens": "avoid",
+  "bracketSpacing": true,
+  "endOfLine": "lf",
+  "insertPragma": false,
+  "printWidth": 100,
+  "quoteProps": "as-needed",
+  "semi": true,
+  "singleQuote": false,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "useTabs": false
+}

Libraries/LibJS/Tests/add-values-to-primitive.js

@@ -1,6 +1,6 @@
 test("adding objects", () => {
-    expect([] + []).toBe("");
-    expect([] + {}).toBe("[object Object]");
-    expect({} + {}).toBe("[object Object][object Object]");
-    expect({} + []).toBe("[object Object]");
+  expect([] + []).toBe("");
+  expect([] + {}).toBe("[object Object]");
+  expect({} + {}).toBe("[object Object][object Object]");
+  expect({} + []).toBe("[object Object]");
 });

Libraries/LibJS/Tests/automatic-semicolon-insertion.js

@@ -1,6 +1,5 @@
 test("Issue #1829, if-else without braces or semicolons", () => {
-    const source = 
-`if (1)
+  const source = `if (1)
     return 1;
 else
     return 0;
@@ -15,12 +14,11 @@ if (1)
 else
     return 0;`;
 
-    expect(source).toEval();
+  expect(source).toEval();
 });
 
 test("break/continue, variable declaration, do-while, and return asi", () => {
-    const source = 
-`function foo() {
+  const source = `function foo() {
     label:
     for (var i = 0; i < 4; i++) {
         break // semicolon inserted here
@@ -41,12 +39,11 @@ var curly/* semicolon inserted here */}
 
 return foo();`;
 
-    expect(source).toEvalTo(undefined);
+  expect(source).toEvalTo(undefined);
 });
 
 test("more break and continue asi", () => {
-    const source =
-`let counter = 0;
+  const source = `let counter = 0;
 let outer;
 
 outer:
@@ -60,9 +57,9 @@ for (let i = 0; i < 5; ++i) {
 
 return counter;`;
 
-    expect(source).toEvalTo(5);
+  expect(source).toEvalTo(5);
 });
 
 test("eof with no semicolon", () => {
-    expect("var eof").toEval();
+  expect("var eof").toEval();
 });

Libraries/LibJS/Tests/builtins/Array/Array.isArray.js

@@ -1,28 +1,28 @@
 load("test-common.js");
 
 try {
-    assert(Array.isArray.length === 1);
+  assert(Array.isArray.length === 1);
 
-    assert(Array.isArray() === false);
-    assert(Array.isArray("1") === false);
-    assert(Array.isArray("foo") === false);
-    assert(Array.isArray(1) === false);
-    assert(Array.isArray(1, 2, 3) === false);
-    assert(Array.isArray(undefined) === false);
-    assert(Array.isArray(null) === false);
-    assert(Array.isArray(Infinity) === false);
-    assert(Array.isArray({}) === false);
+  assert(Array.isArray() === false);
+  assert(Array.isArray("1") === false);
+  assert(Array.isArray("foo") === false);
+  assert(Array.isArray(1) === false);
+  assert(Array.isArray(1, 2, 3) === false);
+  assert(Array.isArray(undefined) === false);
+  assert(Array.isArray(null) === false);
+  assert(Array.isArray(Infinity) === false);
+  assert(Array.isArray({}) === false);
 
-    assert(Array.isArray([]) === true);
-    assert(Array.isArray([1]) === true);
-    assert(Array.isArray([1, 2, 3]) === true);
-    assert(Array.isArray(new Array()) === true);
-    assert(Array.isArray(new Array(10)) === true);
-    assert(Array.isArray(new Array("a", "b", "c")) === true);
-    // FIXME: Array.prototype is supposed to be an array!
-    // assert(Array.isArray(Array.prototype) === true);
+  assert(Array.isArray([]) === true);
+  assert(Array.isArray([1]) === true);
+  assert(Array.isArray([1, 2, 3]) === true);
+  assert(Array.isArray(new Array()) === true);
+  assert(Array.isArray(new Array(10)) === true);
+  assert(Array.isArray(new Array("a", "b", "c")) === true);
+  // FIXME: Array.prototype is supposed to be an array!
+  // assert(Array.isArray(Array.prototype) === true);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.js

@@ -1,48 +1,55 @@
 load("test-common.js");
 
 try {
-    assert(Array.length === 1);
-    assert(Array.name === "Array");
-    assert(Array.prototype.length === 0);
-
-    assert(typeof Array() === "object");
-    assert(typeof new Array() === "object");
-
-    var a;
-
-    a = new Array(5);
-    assert(a.length === 5);
-
-    a = new Array("5");
-    assert(a.length === 1);
-    assert(a[0] === "5");
-
-    a = new Array(1, 2, 3);
-    assert(a.length === 3);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-
-    a = new Array([1, 2, 3]);
-    assert(a.length === 1);
-    assert(a[0][0] === 1);
-    assert(a[0][1] === 2);
-    assert(a[0][2] === 3);
-
-    a = new Array(1, 2, 3);
-    Object.defineProperty(a, 3, { get() { return 10; } });
-    assert(a.toString() === "1,2,3,10");
-
-    [-1, -100, -0.1, 0.1, 1.23, Infinity, -Infinity, NaN].forEach(value => {
-        assertThrowsError(() => {
-            new Array(value);
-        }, {
-            error: TypeError,
-            message: "Invalid array length"
-        });
-    });
-
-    console.log("PASS");
+  assert(Array.length === 1);
+  assert(Array.name === "Array");
+  assert(Array.prototype.length === 0);
+
+  assert(typeof Array() === "object");
+  assert(typeof new Array() === "object");
+
+  var a;
+
+  a = new Array(5);
+  assert(a.length === 5);
+
+  a = new Array("5");
+  assert(a.length === 1);
+  assert(a[0] === "5");
+
+  a = new Array(1, 2, 3);
+  assert(a.length === 3);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+
+  a = new Array([1, 2, 3]);
+  assert(a.length === 1);
+  assert(a[0][0] === 1);
+  assert(a[0][1] === 2);
+  assert(a[0][2] === 3);
+
+  a = new Array(1, 2, 3);
+  Object.defineProperty(a, 3, {
+    get() {
+      return 10;
+    },
+  });
+  assert(a.toString() === "1,2,3,10");
+
+  [-1, -100, -0.1, 0.1, 1.23, Infinity, -Infinity, NaN].forEach(value => {
+    assertThrowsError(
+      () => {
+        new Array(value);
+      },
+      {
+        error: TypeError,
+        message: "Invalid array length",
+      }
+    );
+  });
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.of.js

@@ -1,46 +1,50 @@
 load("test-common.js");
 
 try {
-    assert(Array.of.length === 0);
-
-    assert(typeof Array.of() === "object");
-
-    var a;
-
-    a = Array.of(5);
-    assert(a.length === 1);
-    assert(a[0] === 5);
-
-    a = Array.of("5");
-    assert(a.length === 1);
-    assert(a[0] === "5");
-
-    a = Array.of(Infinity);
-    assert(a.length === 1);
-    assert(a[0] === Infinity);
-
-    a = Array.of(1, 2, 3);
-    assert(a.length === 3);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-
-    a = Array.of([1, 2, 3]);
-    assert(a.length === 1);
-    assert(a[0][0] === 1);
-    assert(a[0][1] === 2);
-    assert(a[0][2] === 3);
-
-    let t = [1, 2, 3];
-    Object.defineProperty(t, 3, { get() { return 4; } });
-    a = Array.of(...t);
-    assert(a.length === 4);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-    assert(a[3] === 4);
-
-    console.log("PASS");
+  assert(Array.of.length === 0);
+
+  assert(typeof Array.of() === "object");
+
+  var a;
+
+  a = Array.of(5);
+  assert(a.length === 1);
+  assert(a[0] === 5);
+
+  a = Array.of("5");
+  assert(a.length === 1);
+  assert(a[0] === "5");
+
+  a = Array.of(Infinity);
+  assert(a.length === 1);
+  assert(a[0] === Infinity);
+
+  a = Array.of(1, 2, 3);
+  assert(a.length === 3);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+
+  a = Array.of([1, 2, 3]);
+  assert(a.length === 1);
+  assert(a[0][0] === 1);
+  assert(a[0][1] === 2);
+  assert(a[0][2] === 3);
+
+  let t = [1, 2, 3];
+  Object.defineProperty(t, 3, {
+    get() {
+      return 4;
+    },
+  });
+  a = Array.of(...t);
+  assert(a.length === 4);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+  assert(a[3] === 4);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype-generic-functions.js

@@ -1,134 +1,159 @@
 load("test-common.js");
 
 try {
-    [undefined, "foo", -42, 0].forEach(length => {
-        const o = { length };
-
-        assert(Array.prototype.push.call(o, "foo") === 1);
-        assert(o.length === 1);
-        assert(o[0] === "foo");
-        assert(Array.prototype.push.call(o, "bar", "baz") === 3);
-        assert(o.length === 3);
-        assert(o[0] === "foo");
-        assert(o[1] === "bar");
-        assert(o[2] === "baz");
-
-        assert(Array.prototype.pop.call(o) === "baz");
-        assert(o.length === 2);
-        assert(Array.prototype.pop.call(o) === "bar");
-        assert(o.length === 1);
-        assert(Array.prototype.pop.call(o) === "foo");
-        assert(o.length === 0);
-        assert(Array.prototype.pop.call(o) === undefined);
-        assert(o.length === 0);
-
-        o.length = length;
-        assert(Array.prototype.pop.call(o) === undefined);
-        assert(o.length === 0);
-    });
-
-    {
-        const o = { length: 3, 0: "hello", 2: "serenity" };
-        const removed = Array.prototype.splice.call(o, 0, 2, "hello", "friends");
-        assert(o.length === 3);
-        assert(o[0] === "hello");
-        assert(o[1] === "friends");
-        assert(o[2] === "serenity");
-        assert(removed.length === 2);
-        assert(removed[0] === "hello");
-        assert(removed[1] === undefined);
-    }
-
-    {
-        assert(Array.prototype.join.call({}) === "");
-        assert(Array.prototype.join.call({ length: "foo" }) === "");
-        assert(Array.prototype.join.call({ length: 3 }) === ",,");
-        assert(Array.prototype.join.call({ length: 2, 0: "foo", 1: "bar" }) === "foo,bar");
-        assert(Array.prototype.join.call({ length: 2, 0: "foo", 1: "bar", 2: "baz" }) === "foo,bar");
-        assert(Array.prototype.join.call({ length: 3, 1: "bar" }, "~") === "~bar~");
-        assert(Array.prototype.join.call({ length: 3, 0: "foo", 1: "bar", 2: "baz" }, "~") === "foo~bar~baz");
-    }
-
-    {
-        assert(Array.prototype.toString.call({}) === "[object Object]");
-        assert(Array.prototype.toString.call({ join: "foo" }) === "[object Object]");
-        assert(Array.prototype.toString.call({ join: () => "foo" }) === "foo");
-    }
-
-    {
-        assert(Array.prototype.indexOf.call({}) === -1);
-        assert(Array.prototype.indexOf.call({ 0: undefined }) === -1);
-        assert(Array.prototype.indexOf.call({ length: 1, 0: undefined }) === 0);
-        assert(Array.prototype.indexOf.call({ length: 1, 2: "foo" }, "foo") === -1);
-        assert(Array.prototype.indexOf.call({ length: 5, 2: "foo" }, "foo") === 2);
-        assert(Array.prototype.indexOf.call({ length: 5, 2: "foo", 4: "foo" }, "foo", 3) === 4);
-    }
-
-    {
-        assert(Array.prototype.lastIndexOf.call({}) === -1);
-        assert(Array.prototype.lastIndexOf.call({ 0: undefined }) === -1);
-        assert(Array.prototype.lastIndexOf.call({ length: 1, 0: undefined }) === 0);
-        assert(Array.prototype.lastIndexOf.call({ length: 1, 2: "foo" }, "foo") === -1);
-        assert(Array.prototype.lastIndexOf.call({ length: 5, 2: "foo" }, "foo") === 2);
-        assert(Array.prototype.lastIndexOf.call({ length: 5, 2: "foo", 4: "foo" }, "foo") === 4);
-        assert(Array.prototype.lastIndexOf.call({ length: 5, 2: "foo", 4: "foo" }, "foo", -2) === 2);
-    }
-
-    {
-        assert(Array.prototype.includes.call({}) === false);
-        assert(Array.prototype.includes.call({ 0: undefined }) === false);
-        assert(Array.prototype.includes.call({ length: 1, 0: undefined }) === true);
-        assert(Array.prototype.includes.call({ length: 1, 2: "foo" }, "foo") === false);
-        assert(Array.prototype.includes.call({ length: 5, 2: "foo" }, "foo") === true);
-    }
-
-    const o = { length: 5, 0: "foo", 1: "bar", 3: "baz" };
-
-    {
-        assertVisitsAll(visit => {
-            Array.prototype.every.call(o, function (value) {
-                visit(value);
-                return true;
-            });
-        }, ["foo", "bar", "baz"]);
-    }
-
-    ["find", "findIndex"].forEach(name => {
-        assertVisitsAll(visit => {
-            Array.prototype[name].call(o, function (value) {
-                visit(value);
-                return false;
-            });
-        }, ["foo", "bar", undefined, "baz", undefined]);
-    });
-
-    ["filter", "forEach", "map", "some"].forEach(name => {
-        assertVisitsAll(visit => {
-            Array.prototype[name].call(o, function (value) {
-                visit(value);
-                return false;
-            });
-        }, ["foo", "bar", "baz"]);
-    });
-    {
-        assertVisitsAll(visit => {
-            Array.prototype.reduce.call(o, function (_, value) {
-                visit(value);
-                return false;
-            }, "initial");
-        }, ["foo", "bar", "baz"]);
-    }
-
-    {
-        assertVisitsAll(visit => {
-            Array.prototype.reduceRight.call(o, function (_, value) {
-                visit(value);
-                return false;
-            }, "initial");
-        }, ["baz", "bar", "foo"]);
-    }
-
-    console.log("PASS");
+  [undefined, "foo", -42, 0].forEach(length => {
+    const o = { length };
+
+    assert(Array.prototype.push.call(o, "foo") === 1);
+    assert(o.length === 1);
+    assert(o[0] === "foo");
+    assert(Array.prototype.push.call(o, "bar", "baz") === 3);
+    assert(o.length === 3);
+    assert(o[0] === "foo");
+    assert(o[1] === "bar");
+    assert(o[2] === "baz");
+
+    assert(Array.prototype.pop.call(o) === "baz");
+    assert(o.length === 2);
+    assert(Array.prototype.pop.call(o) === "bar");
+    assert(o.length === 1);
+    assert(Array.prototype.pop.call(o) === "foo");
+    assert(o.length === 0);
+    assert(Array.prototype.pop.call(o) === undefined);
+    assert(o.length === 0);
+
+    o.length = length;
+    assert(Array.prototype.pop.call(o) === undefined);
+    assert(o.length === 0);
+  });
+
+  {
+    const o = { length: 3, 0: "hello", 2: "serenity" };
+    const removed = Array.prototype.splice.call(o, 0, 2, "hello", "friends");
+    assert(o.length === 3);
+    assert(o[0] === "hello");
+    assert(o[1] === "friends");
+    assert(o[2] === "serenity");
+    assert(removed.length === 2);
+    assert(removed[0] === "hello");
+    assert(removed[1] === undefined);
+  }
+
+  {
+    assert(Array.prototype.join.call({}) === "");
+    assert(Array.prototype.join.call({ length: "foo" }) === "");
+    assert(Array.prototype.join.call({ length: 3 }) === ",,");
+    assert(Array.prototype.join.call({ length: 2, 0: "foo", 1: "bar" }) === "foo,bar");
+    assert(Array.prototype.join.call({ length: 2, 0: "foo", 1: "bar", 2: "baz" }) === "foo,bar");
+    assert(Array.prototype.join.call({ length: 3, 1: "bar" }, "~") === "~bar~");
+    assert(
+      Array.prototype.join.call({ length: 3, 0: "foo", 1: "bar", 2: "baz" }, "~") === "foo~bar~baz"
+    );
+  }
+
+  {
+    assert(Array.prototype.toString.call({}) === "[object Object]");
+    assert(Array.prototype.toString.call({ join: "foo" }) === "[object Object]");
+    assert(Array.prototype.toString.call({ join: () => "foo" }) === "foo");
+  }
+
+  {
+    assert(Array.prototype.indexOf.call({}) === -1);
+    assert(Array.prototype.indexOf.call({ 0: undefined }) === -1);
+    assert(Array.prototype.indexOf.call({ length: 1, 0: undefined }) === 0);
+    assert(Array.prototype.indexOf.call({ length: 1, 2: "foo" }, "foo") === -1);
+    assert(Array.prototype.indexOf.call({ length: 5, 2: "foo" }, "foo") === 2);
+    assert(Array.prototype.indexOf.call({ length: 5, 2: "foo", 4: "foo" }, "foo", 3) === 4);
+  }
+
+  {
+    assert(Array.prototype.lastIndexOf.call({}) === -1);
+    assert(Array.prototype.lastIndexOf.call({ 0: undefined }) === -1);
+    assert(Array.prototype.lastIndexOf.call({ length: 1, 0: undefined }) === 0);
+    assert(Array.prototype.lastIndexOf.call({ length: 1, 2: "foo" }, "foo") === -1);
+    assert(Array.prototype.lastIndexOf.call({ length: 5, 2: "foo" }, "foo") === 2);
+    assert(Array.prototype.lastIndexOf.call({ length: 5, 2: "foo", 4: "foo" }, "foo") === 4);
+    assert(Array.prototype.lastIndexOf.call({ length: 5, 2: "foo", 4: "foo" }, "foo", -2) === 2);
+  }
+
+  {
+    assert(Array.prototype.includes.call({}) === false);
+    assert(Array.prototype.includes.call({ 0: undefined }) === false);
+    assert(Array.prototype.includes.call({ length: 1, 0: undefined }) === true);
+    assert(Array.prototype.includes.call({ length: 1, 2: "foo" }, "foo") === false);
+    assert(Array.prototype.includes.call({ length: 5, 2: "foo" }, "foo") === true);
+  }
+
+  const o = { length: 5, 0: "foo", 1: "bar", 3: "baz" };
+
+  {
+    assertVisitsAll(
+      visit => {
+        Array.prototype.every.call(o, function (value) {
+          visit(value);
+          return true;
+        });
+      },
+      ["foo", "bar", "baz"]
+    );
+  }
+
+  ["find", "findIndex"].forEach(name => {
+    assertVisitsAll(
+      visit => {
+        Array.prototype[name].call(o, function (value) {
+          visit(value);
+          return false;
+        });
+      },
+      ["foo", "bar", undefined, "baz", undefined]
+    );
+  });
+
+  ["filter", "forEach", "map", "some"].forEach(name => {
+    assertVisitsAll(
+      visit => {
+        Array.prototype[name].call(o, function (value) {
+          visit(value);
+          return false;
+        });
+      },
+      ["foo", "bar", "baz"]
+    );
+  });
+  {
+    assertVisitsAll(
+      visit => {
+        Array.prototype.reduce.call(
+          o,
+          function (_, value) {
+            visit(value);
+            return false;
+          },
+          "initial"
+        );
+      },
+      ["foo", "bar", "baz"]
+    );
+  }
+
+  {
+    assertVisitsAll(
+      visit => {
+        Array.prototype.reduceRight.call(
+          o,
+          function (_, value) {
+            visit(value);
+            return false;
+          },
+          "initial"
+        );
+      },
+      ["baz", "bar", "foo"]
+    );
+  }
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.concat.js

@@ -1,37 +1,36 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.concat.length === 1);
+  assert(Array.prototype.concat.length === 1);
 
-    var array = ["hello", "friends"];
+  var array = ["hello", "friends"];
 
-    var array_concat = array.concat();
-    assert(array_concat.length === array.length);
+  var array_concat = array.concat();
+  assert(array_concat.length === array.length);
 
-    array_concat = array.concat(1)
-    assert(array_concat.length === 3);
-    assert(array_concat[2] === 1);
+  array_concat = array.concat(1);
+  assert(array_concat.length === 3);
+  assert(array_concat[2] === 1);
 
-    array_concat = array.concat([1, 2, 3])
-    assert(array_concat.length === 5);
-    assert(array_concat[2] === 1);
-    assert(array_concat[3] === 2);
-    assert(array_concat[4] === 3);
+  array_concat = array.concat([1, 2, 3]);
+  assert(array_concat.length === 5);
+  assert(array_concat[2] === 1);
+  assert(array_concat[3] === 2);
+  assert(array_concat[4] === 3);
 
-    array_concat = array.concat(false, "serenity");
-    assert(array_concat.length === 4);
-    assert(array_concat[2] === false);
-    assert(array_concat[3] === "serenity");
+  array_concat = array.concat(false, "serenity");
+  assert(array_concat.length === 4);
+  assert(array_concat[2] === false);
+  assert(array_concat[3] === "serenity");
 
-    array_concat = array.concat({ name: "libjs" }, [1, [2, 3]]);
-    assert(array_concat.length === 5);
-    assert(array_concat[2].name === "libjs");
-    assert(array_concat[3] === 1);
-    assert(array_concat[4][0] === 2);
-    assert(array_concat[4][1] === 3);
+  array_concat = array.concat({ name: "libjs" }, [1, [2, 3]]);
+  assert(array_concat.length === 5);
+  assert(array_concat[2].name === "libjs");
+  assert(array_concat[3] === 1);
+  assert(array_concat[4][0] === 2);
+  assert(array_concat[4][1] === 3);
 
-
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.every.js

@@ -1,44 +1,49 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.every.length === 1);
-
-    assertThrowsError(() => {
-        [].every(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    var arrayOne = ["serenity", { test: "serenity"} ];
-    var arrayTwo = [true, false, 1, 2, 3, "3"];
-
-    assert(arrayOne.every(value => value === "hello") === false);
-    assert(arrayOne.every(value => value === "serenity") === false);
-    assert(arrayOne.every((value, index, arr) => index < 2) === true);
-    assert(arrayOne.every(value => typeof(value) === "string") === false);
-    assert(arrayOne.every(value => arrayOne.pop()) === true);
-
-    assert(arrayTwo.every((value, index, arr) => index > 0) === false);
-    assert(arrayTwo.every((value, index, arr) => index >= 0) === true);
-    assert(arrayTwo.every(value => typeof(value) !== "string") === false);
-    assert(arrayTwo.every(value => typeof(value) === "number") === false);
-    assert(arrayTwo.every(value => value > 0) === false);
-    assert(arrayTwo.every(value => value >= 0 && value < 4) === true);
-    assert(arrayTwo.every(value => arrayTwo.pop()) === true);
-
-    assert(["", "hello", "friends", "serenity"].every(value => value.length >= 0) === true);
-    assert([].every(value => value === 1) === true);
-
-    arrayTwo = [true, false, 1, 2, 3, "3"];
-
-    // Every only goes up to the original length.
-    assert(arrayTwo.every((value, index, arr) => {
-        arr.push("serenity");
-        return value < 4;
-    }) === true);
-
-    console.log("PASS");
+  assert(Array.prototype.every.length === 1);
+
+  assertThrowsError(
+    () => {
+      [].every(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  var arrayOne = ["serenity", { test: "serenity" }];
+  var arrayTwo = [true, false, 1, 2, 3, "3"];
+
+  assert(arrayOne.every(value => value === "hello") === false);
+  assert(arrayOne.every(value => value === "serenity") === false);
+  assert(arrayOne.every((value, index, arr) => index < 2) === true);
+  assert(arrayOne.every(value => typeof value === "string") === false);
+  assert(arrayOne.every(value => arrayOne.pop()) === true);
+
+  assert(arrayTwo.every((value, index, arr) => index > 0) === false);
+  assert(arrayTwo.every((value, index, arr) => index >= 0) === true);
+  assert(arrayTwo.every(value => typeof value !== "string") === false);
+  assert(arrayTwo.every(value => typeof value === "number") === false);
+  assert(arrayTwo.every(value => value > 0) === false);
+  assert(arrayTwo.every(value => value >= 0 && value < 4) === true);
+  assert(arrayTwo.every(value => arrayTwo.pop()) === true);
+
+  assert(["", "hello", "friends", "serenity"].every(value => value.length >= 0) === true);
+  assert([].every(value => value === 1) === true);
+
+  arrayTwo = [true, false, 1, 2, 3, "3"];
+
+  // Every only goes up to the original length.
+  assert(
+    arrayTwo.every((value, index, arr) => {
+      arr.push("serenity");
+      return value < 4;
+    }) === true
+  );
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.fill.js

@@ -1,24 +1,23 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.fill.length === 1);
+  assert(Array.prototype.fill.length === 1);
 
-    var array = [1, 2, 3, 4];
-    assertArrayEquals(array.fill(0, 2, 4), [1, 2, 0, 0]);
-    assertArrayEquals(array.fill(5, 1), [1, 5, 5, 5]);
-    assertArrayEquals(array.fill(6), [6, 6, 6, 6]);
+  var array = [1, 2, 3, 4];
+  assertArrayEquals(array.fill(0, 2, 4), [1, 2, 0, 0]);
+  assertArrayEquals(array.fill(5, 1), [1, 5, 5, 5]);
+  assertArrayEquals(array.fill(6), [6, 6, 6, 6]);
 
-    assertArrayEquals([1, 2, 3].fill(4), [4, 4, 4]);
-    assertArrayEquals([1, 2, 3].fill(4, 1), [1, 4, 4]);
-    assertArrayEquals([1, 2, 3].fill(4, 1, 2), [1, 4, 3]);
-    assertArrayEquals([1, 2, 3].fill(4, 3, 3), [1, 2, 3]);
-    assertArrayEquals([1, 2, 3].fill(4, -3, -2), [4, 2, 3]);
-    assertArrayEquals([1, 2, 3].fill(4, NaN, NaN), [1, 2, 3]);
-    assertArrayEquals([1, 2, 3].fill(4, 3, 5), [1, 2, 3]);
-    assertArrayEquals(Array(3).fill(4), [4, 4, 4]);
+  assertArrayEquals([1, 2, 3].fill(4), [4, 4, 4]);
+  assertArrayEquals([1, 2, 3].fill(4, 1), [1, 4, 4]);
+  assertArrayEquals([1, 2, 3].fill(4, 1, 2), [1, 4, 3]);
+  assertArrayEquals([1, 2, 3].fill(4, 3, 3), [1, 2, 3]);
+  assertArrayEquals([1, 2, 3].fill(4, -3, -2), [4, 2, 3]);
+  assertArrayEquals([1, 2, 3].fill(4, NaN, NaN), [1, 2, 3]);
+  assertArrayEquals([1, 2, 3].fill(4, 3, 5), [1, 2, 3]);
+  assertArrayEquals(Array(3).fill(4), [4, 4, 4]);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }
-

Libraries/LibJS/Tests/builtins/Array/Array.prototype.filter.js

@@ -1,59 +1,78 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.filter.length === 1);
-
-    assertThrowsError(() => {
-        [].filter();
-    }, {
-        error: TypeError,
-        message: "Array.prototype.filter() requires at least one argument"
-    });
-
-    assertThrowsError(() => {
-        [].filter(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    var callbackCalled = 0;
-    var callback = () => { callbackCalled++; };
-
-    assert([].filter(callback).length === 0);
-    assert(callbackCalled === 0);
-
-    assert([1, 2, 3].filter(callback).length === 0);
-    assert(callbackCalled === 3);
-
-    var evenNumbers = [0, 1, 2, 3, 4, 5, 6, 7].filter(x => x % 2 === 0);
-    assert(evenNumbers.length === 4);
-    assert(evenNumbers[0] === 0);
-    assert(evenNumbers[1] === 2);
-    assert(evenNumbers[2] === 4);
-    assert(evenNumbers[3] === 6);
-
-    var fruits = ["Apple", "Banana", "Blueberry", "Grape", "Mango", "Orange", "Peach", "Pineapple", "Raspberry", "Watermelon"];
-    const filterItems = (arr, query) => {
-        return arr.filter(el => el.toLowerCase().indexOf(query.toLowerCase()) !== -1)
-    };
-
-    var results;
-
-    results = filterItems(fruits, "Berry");
-    assert(results.length === 2);
-    assert(results[0] === "Blueberry");
-    assert(results[1] === "Raspberry");
-
-    results = filterItems(fruits, "P");
-    assert(results.length === 5);
-    assert(results[0] === "Apple");
-    assert(results[1] === "Grape");
-    assert(results[2] === "Peach");
-    assert(results[3] === "Pineapple");
-    assert(results[4] === "Raspberry");
-
-    console.log("PASS");
+  assert(Array.prototype.filter.length === 1);
+
+  assertThrowsError(
+    () => {
+      [].filter();
+    },
+    {
+      error: TypeError,
+      message: "Array.prototype.filter() requires at least one argument",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [].filter(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  var callbackCalled = 0;
+  var callback = () => {
+    callbackCalled++;
+  };
+
+  assert([].filter(callback).length === 0);
+  assert(callbackCalled === 0);
+
+  assert([1, 2, 3].filter(callback).length === 0);
+  assert(callbackCalled === 3);
+
+  var evenNumbers = [0, 1, 2, 3, 4, 5, 6, 7].filter(x => x % 2 === 0);
+  assert(evenNumbers.length === 4);
+  assert(evenNumbers[0] === 0);
+  assert(evenNumbers[1] === 2);
+  assert(evenNumbers[2] === 4);
+  assert(evenNumbers[3] === 6);
+
+  var fruits = [
+    "Apple",
+    "Banana",
+    "Blueberry",
+    "Grape",
+    "Mango",
+    "Orange",
+    "Peach",
+    "Pineapple",
+    "Raspberry",
+    "Watermelon",
+  ];
+  const filterItems = (arr, query) => {
+    return arr.filter(el => el.toLowerCase().indexOf(query.toLowerCase()) !== -1);
+  };
+
+  var results;
+
+  results = filterItems(fruits, "Berry");
+  assert(results.length === 2);
+  assert(results[0] === "Blueberry");
+  assert(results[1] === "Raspberry");
+
+  results = filterItems(fruits, "P");
+  assert(results.length === 5);
+  assert(results[0] === "Apple");
+  assert(results[1] === "Grape");
+  assert(results[2] === "Peach");
+  assert(results[3] === "Pineapple");
+  assert(results[4] === "Raspberry");
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.find.js

@@ -1,49 +1,54 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.find.length === 1);
-
-    assertThrowsError(() => {
-        [].find(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    var array = ["hello", "friends", 1, 2, false];
-
-    assert(array.find(value => value === "hello") === "hello");
-    assert(array.find((value, index, arr) => index === 1) === "friends");
-    assert(array.find(value => value == "1") === 1);
-    assert(array.find(value => value === 1) === 1);
-    assert(array.find(value => typeof(value) !== "string") === 1);
-    assert(array.find(value => typeof(value) === "boolean") === false);
-    assert(array.find(value => value > 1) === 2);
-    assert(array.find(value => value > 1 && value < 3) === 2);
-    assert(array.find(value => value > 100) === undefined);
-    assert([].find(value => value === 1) === undefined);
-
-    var callbackCalled = 0;
-    var callback = () => { callbackCalled++; };
-
-    [].find(callback)
-    assert(callbackCalled === 0);
-
-    [1, 2, 3].find(callback);
-    assert(callbackCalled === 3);
-
-    callbackCalled = 0;
-    [1, , , "foo", , undefined, , ,].find(callback);
-    assert(callbackCalled === 8);
-
-    callbackCalled = 0;
-    [1, , , "foo", , undefined, , ,].find(value => {
-        callbackCalled++;
-        return value === undefined;
-    });
-    assert(callbackCalled === 2);
-
-    console.log("PASS");
+  assert(Array.prototype.find.length === 1);
+
+  assertThrowsError(
+    () => {
+      [].find(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  var array = ["hello", "friends", 1, 2, false];
+
+  assert(array.find(value => value === "hello") === "hello");
+  assert(array.find((value, index, arr) => index === 1) === "friends");
+  assert(array.find(value => value == "1") === 1);
+  assert(array.find(value => value === 1) === 1);
+  assert(array.find(value => typeof value !== "string") === 1);
+  assert(array.find(value => typeof value === "boolean") === false);
+  assert(array.find(value => value > 1) === 2);
+  assert(array.find(value => value > 1 && value < 3) === 2);
+  assert(array.find(value => value > 100) === undefined);
+  assert([].find(value => value === 1) === undefined);
+
+  var callbackCalled = 0;
+  var callback = () => {
+    callbackCalled++;
+  };
+
+  [].find(callback);
+  assert(callbackCalled === 0);
+
+  [1, 2, 3].find(callback);
+  assert(callbackCalled === 3);
+
+  callbackCalled = 0;
+  [1, , , "foo", , undefined, , ,].find(callback);
+  assert(callbackCalled === 8);
+
+  callbackCalled = 0;
+  [1, , , "foo", , undefined, , ,].find(value => {
+    callbackCalled++;
+    return value === undefined;
+  });
+  assert(callbackCalled === 2);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.findIndex.js

@@ -1,49 +1,54 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.findIndex.length === 1);
-
-    assertThrowsError(() => {
-        [].findIndex(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    var array = ["hello", "friends", 1, 2, false];
-
-    assert(array.findIndex(value => value === "hello") === 0);
-    assert(array.findIndex((value, index, arr) => index === 1) === 1);
-    assert(array.findIndex(value => value == "1") === 2);
-    assert(array.findIndex(value => value === 1) === 2);
-    assert(array.findIndex(value => typeof(value) !== "string") === 2);
-    assert(array.findIndex(value => typeof(value) === "boolean") === 4);
-    assert(array.findIndex(value => value > 1) === 3);
-    assert(array.findIndex(value => value > 1 && value < 3) === 3);
-    assert(array.findIndex(value => value > 100) === -1);
-    assert([].findIndex(value => value === 1) === -1);
-
-    var callbackCalled = 0;
-    var callback = () => { callbackCalled++; };
-
-    [].findIndex(callback)
-    assert(callbackCalled === 0);
-
-    [1, 2, 3].findIndex(callback);
-    assert(callbackCalled === 3);
-
-    callbackCalled = 0;
-    [1, , , "foo", , undefined, , ,].findIndex(callback);
-    assert(callbackCalled === 8);
-
-    callbackCalled = 0;
-    [1, , , "foo", , undefined, , ,].findIndex(value => {
-        callbackCalled++;
-        return value === undefined;
-    });
-    assert(callbackCalled === 2);
-
-    console.log("PASS");
+  assert(Array.prototype.findIndex.length === 1);
+
+  assertThrowsError(
+    () => {
+      [].findIndex(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  var array = ["hello", "friends", 1, 2, false];
+
+  assert(array.findIndex(value => value === "hello") === 0);
+  assert(array.findIndex((value, index, arr) => index === 1) === 1);
+  assert(array.findIndex(value => value == "1") === 2);
+  assert(array.findIndex(value => value === 1) === 2);
+  assert(array.findIndex(value => typeof value !== "string") === 2);
+  assert(array.findIndex(value => typeof value === "boolean") === 4);
+  assert(array.findIndex(value => value > 1) === 3);
+  assert(array.findIndex(value => value > 1 && value < 3) === 3);
+  assert(array.findIndex(value => value > 100) === -1);
+  assert([].findIndex(value => value === 1) === -1);
+
+  var callbackCalled = 0;
+  var callback = () => {
+    callbackCalled++;
+  };
+
+  [].findIndex(callback);
+  assert(callbackCalled === 0);
+
+  [1, 2, 3].findIndex(callback);
+  assert(callbackCalled === 3);
+
+  callbackCalled = 0;
+  [1, , , "foo", , undefined, , ,].findIndex(callback);
+  assert(callbackCalled === 8);
+
+  callbackCalled = 0;
+  [1, , , "foo", , undefined, , ,].findIndex(value => {
+    callbackCalled++;
+    return value === undefined;
+  });
+  assert(callbackCalled === 2);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.forEach.js

@@ -1,62 +1,70 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.forEach.length === 1);
-
-    assertThrowsError(() => {
-        [].forEach();
-    }, {
-        error: TypeError,
-        message: "Array.prototype.forEach() requires at least one argument"
-    });
-
-    assertThrowsError(() => {
-        [].forEach(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    var a = [1, 2, 3];
-    var o = {};
-    var callbackCalled = 0;
-    var callback = () => { callbackCalled++; };
-
-    assert([].forEach(callback) === undefined);
-    assert(callbackCalled === 0);
-
-    assert(a.forEach(callback) === undefined);
-    assert(callbackCalled === 3);
-
-    callbackCalled = 0;
-    a.forEach(function(value, index) {
-        assert(value === a[index]);
-        assert(index === a[index] - 1);
-    });
-
-    callbackCalled = 0;
-    a.forEach(function(_, _, array) {
-        callbackCalled++;
-        assert(a.length === array.length);
-        a.push("test");
-    });
-    assert(callbackCalled === 3);
-    assert(a.length === 6);
-
-    callbackCalled = 0;
-    a.forEach(function(value, index) {
-        callbackCalled++;
-        this[index] = value;
-    }, o);
-    assert(callbackCalled === 6);
-    assert(o[0] === 1);
-    assert(o[1] === 2);
-    assert(o[2] === 3);
-    assert(o[3] === "test");
-    assert(o[4] === "test");
-    assert(o[5] === "test");
-
-    console.log("PASS");
+  assert(Array.prototype.forEach.length === 1);
+
+  assertThrowsError(
+    () => {
+      [].forEach();
+    },
+    {
+      error: TypeError,
+      message: "Array.prototype.forEach() requires at least one argument",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [].forEach(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  var a = [1, 2, 3];
+  var o = {};
+  var callbackCalled = 0;
+  var callback = () => {
+    callbackCalled++;
+  };
+
+  assert([].forEach(callback) === undefined);
+  assert(callbackCalled === 0);
+
+  assert(a.forEach(callback) === undefined);
+  assert(callbackCalled === 3);
+
+  callbackCalled = 0;
+  a.forEach(function (value, index) {
+    assert(value === a[index]);
+    assert(index === a[index] - 1);
+  });
+
+  callbackCalled = 0;
+  a.forEach(function (_, _, array) {
+    callbackCalled++;
+    assert(a.length === array.length);
+    a.push("test");
+  });
+  assert(callbackCalled === 3);
+  assert(a.length === 6);
+
+  callbackCalled = 0;
+  a.forEach(function (value, index) {
+    callbackCalled++;
+    this[index] = value;
+  }, o);
+  assert(callbackCalled === 6);
+  assert(o[0] === 1);
+  assert(o[1] === 2);
+  assert(o[2] === 3);
+  assert(o[3] === "test");
+  assert(o[4] === "test");
+  assert(o[5] === "test");
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.includes.js

@@ -1,22 +1,22 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.includes.length === 1);
+  assert(Array.prototype.includes.length === 1);
 
-    var array = ['hello', 'friends', 1, 2, false];
+  var array = ["hello", "friends", 1, 2, false];
 
-    assert([].includes() === false);
-    assert([undefined].includes() === true);
-    assert(array.includes('hello') === true);
-    assert(array.includes(1) === true);
-    assert(array.includes(1, -3) === true);
-    assert(array.includes('serenity') === false);
-    assert(array.includes(false, -1) === true);
-    assert(array.includes(2, -1) === false);
-    assert(array.includes(2, -100) === true);
-    assert(array.includes('friends', 100) === false);
+  assert([].includes() === false);
+  assert([undefined].includes() === true);
+  assert(array.includes("hello") === true);
+  assert(array.includes(1) === true);
+  assert(array.includes(1, -3) === true);
+  assert(array.includes("serenity") === false);
+  assert(array.includes(false, -1) === true);
+  assert(array.includes(2, -1) === false);
+  assert(array.includes(2, -100) === true);
+  assert(array.includes("friends", 100) === false);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.indexOf.js

@@ -1,29 +1,29 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.indexOf.length === 1);
+  assert(Array.prototype.indexOf.length === 1);
 
-    var array = ['hello', 'friends', 1, 2, false];
+  var array = ["hello", "friends", 1, 2, false];
 
-    assert(array.indexOf('hello') === 0);
-    assert(array.indexOf('friends') === 1);
-    assert(array.indexOf(false) === 4);
-    assert(array.indexOf(false, 2) === 4);
-    assert(array.indexOf(false, -2) === 4);
-    assert(array.indexOf(1) === 2);
-    assert(array.indexOf(1, 1000) === -1);
-    assert(array.indexOf(1, -1000) === 2);
-    assert(array.indexOf('serenity') === -1);
-    assert(array.indexOf(false, -1) === 4);
-    assert(array.indexOf(2, -1) === -1);
-    assert(array.indexOf(2, -2) === 3);
-    assert([].indexOf('serenity') === -1);
-    assert([].indexOf('serenity', 10) === -1);
-    assert([].indexOf('serenity', -10) === -1);
-    assert([].indexOf() === -1);
-    assert([undefined].indexOf() === 0);
+  assert(array.indexOf("hello") === 0);
+  assert(array.indexOf("friends") === 1);
+  assert(array.indexOf(false) === 4);
+  assert(array.indexOf(false, 2) === 4);
+  assert(array.indexOf(false, -2) === 4);
+  assert(array.indexOf(1) === 2);
+  assert(array.indexOf(1, 1000) === -1);
+  assert(array.indexOf(1, -1000) === 2);
+  assert(array.indexOf("serenity") === -1);
+  assert(array.indexOf(false, -1) === 4);
+  assert(array.indexOf(2, -1) === -1);
+  assert(array.indexOf(2, -2) === 3);
+  assert([].indexOf("serenity") === -1);
+  assert([].indexOf("serenity", 10) === -1);
+  assert([].indexOf("serenity", -10) === -1);
+  assert([].indexOf() === -1);
+  assert([undefined].indexOf() === 0);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.join.js

@@ -1,19 +1,19 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.join.length === 1);
+  assert(Array.prototype.join.length === 1);
 
-    assert(["hello", "friends"].join() === "hello,friends");
-    assert(["hello", "friends"].join(" ") === "hello friends");
-    assert(["hello", "friends", "foo"].join("~", "#") === "hello~friends~foo");
-    assert([].join() === "");
-    assert([null].join() === "");
-    assert([undefined].join() === "");
-    assert([undefined, null, ""].join() === ",,");
-    assert([1, null, 2, undefined, 3].join() === "1,,2,,3");
-    assert(Array(3).join() === ",,");
+  assert(["hello", "friends"].join() === "hello,friends");
+  assert(["hello", "friends"].join(" ") === "hello friends");
+  assert(["hello", "friends", "foo"].join("~", "#") === "hello~friends~foo");
+  assert([].join() === "");
+  assert([null].join() === "");
+  assert([undefined].join() === "");
+  assert([undefined, null, ""].join() === ",,");
+  assert([1, null, 2, undefined, 3].join() === "1,,2,,3");
+  assert(Array(3).join() === ",,");
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.lastIndexOf.js

@@ -1,26 +1,26 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.lastIndexOf.length === 1);
+  assert(Array.prototype.lastIndexOf.length === 1);
 
-    var array = [1, 2, 3, 1, "hello"];
+  var array = [1, 2, 3, 1, "hello"];
 
-    assert(array.lastIndexOf("hello") === 4);
-    assert(array.lastIndexOf("hello", 1000) === 4);
-    assert(array.lastIndexOf(1) === 3);
-    assert(array.lastIndexOf(1, -1) === 3);
-    assert(array.lastIndexOf(1, -2) === 3);
-    assert(array.lastIndexOf(2) === 1);
-    assert(array.lastIndexOf(2, -3) === 1);
-    assert(array.lastIndexOf(2, -4) === 1);
-    assert([].lastIndexOf('hello') === -1);
-    assert([].lastIndexOf('hello', 10) === -1);
-    assert([].lastIndexOf('hello', -10) === -1);
-    assert([].lastIndexOf() === -1);
-    assert([undefined].lastIndexOf() === 0);
-    assert([undefined, undefined, undefined].lastIndexOf() === 2);
+  assert(array.lastIndexOf("hello") === 4);
+  assert(array.lastIndexOf("hello", 1000) === 4);
+  assert(array.lastIndexOf(1) === 3);
+  assert(array.lastIndexOf(1, -1) === 3);
+  assert(array.lastIndexOf(1, -2) === 3);
+  assert(array.lastIndexOf(2) === 1);
+  assert(array.lastIndexOf(2, -3) === 1);
+  assert(array.lastIndexOf(2, -4) === 1);
+  assert([].lastIndexOf("hello") === -1);
+  assert([].lastIndexOf("hello", 10) === -1);
+  assert([].lastIndexOf("hello", -10) === -1);
+  assert([].lastIndexOf() === -1);
+  assert([undefined].lastIndexOf() === 0);
+  assert([undefined, undefined, undefined].lastIndexOf() === 2);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.map.js

@@ -1,53 +1,63 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.map.length === 1);
-
-    assertThrowsError(() => {
-        [].map();
-    }, {
-        error: TypeError,
-        message: "Array.prototype.map() requires at least one argument"
-    });
-
-    assertThrowsError(() => {
-        [].map(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    var callbackCalled = 0;
-    var callback = () => { callbackCalled++; };
-
-    assert([].map(callback).length === 0);
-    assert(callbackCalled === 0);
-
-    assert([1, 2, 3].map(callback).length === 3);
-    assert(callbackCalled === 3);
-
-    callbackCalled = 0;
-    assert([1, , , "foo", , undefined, , ,].map(callback).length === 8);
-    assert(callbackCalled === 3);
-
-    var results = [undefined, null, true, "foo", 42, {}].map((value, index) => "" + index + " -> " + value);
-    assert(results.length === 6);
-    assert(results[0] === "0 -> undefined");
-    assert(results[1] === "1 -> null");
-    assert(results[2] === "2 -> true");
-    assert(results[3] === "3 -> foo");
-    assert(results[4] === "4 -> 42");
-    assert(results[5] === "5 -> [object Object]");
-
-    var squaredNumbers = [0, 1, 2, 3, 4].map(x => x ** 2);
-    assert(squaredNumbers.length === 5);
-    assert(squaredNumbers[0] === 0);
-    assert(squaredNumbers[1] === 1);
-    assert(squaredNumbers[2] === 4);
-    assert(squaredNumbers[3] === 9);
-    assert(squaredNumbers[4] === 16);
-
-    console.log("PASS");
+  assert(Array.prototype.map.length === 1);
+
+  assertThrowsError(
+    () => {
+      [].map();
+    },
+    {
+      error: TypeError,
+      message: "Array.prototype.map() requires at least one argument",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [].map(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  var callbackCalled = 0;
+  var callback = () => {
+    callbackCalled++;
+  };
+
+  assert([].map(callback).length === 0);
+  assert(callbackCalled === 0);
+
+  assert([1, 2, 3].map(callback).length === 3);
+  assert(callbackCalled === 3);
+
+  callbackCalled = 0;
+  assert([1, , , "foo", , undefined, , ,].map(callback).length === 8);
+  assert(callbackCalled === 3);
+
+  var results = [undefined, null, true, "foo", 42, {}].map(
+    (value, index) => "" + index + " -> " + value
+  );
+  assert(results.length === 6);
+  assert(results[0] === "0 -> undefined");
+  assert(results[1] === "1 -> null");
+  assert(results[2] === "2 -> true");
+  assert(results[3] === "3 -> foo");
+  assert(results[4] === "4 -> 42");
+  assert(results[5] === "5 -> [object Object]");
+
+  var squaredNumbers = [0, 1, 2, 3, 4].map(x => x ** 2);
+  assert(squaredNumbers.length === 5);
+  assert(squaredNumbers[0] === 0);
+  assert(squaredNumbers[1] === 1);
+  assert(squaredNumbers[2] === 4);
+  assert(squaredNumbers[3] === 9);
+  assert(squaredNumbers[4] === 16);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.pop.js

@@ -1,21 +1,21 @@
 load("test-common.js");
 
 try {
-    var a = [1, 2, 3];
-    var value = a.pop();
-    assert(value === 3);
-    assert(a.length === 2);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
+  var a = [1, 2, 3];
+  var value = a.pop();
+  assert(value === 3);
+  assert(a.length === 2);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
 
-    var a = [];
-    var value = a.pop();
-    assert(value === undefined);
-    assert(a.length === 0);
+  var a = [];
+  var value = a.pop();
+  assert(value === undefined);
+  assert(a.length === 0);
 
-    assert([,].pop() === undefined);
+  assert([,].pop() === undefined);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.push.js

@@ -1,30 +1,30 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.push.length === 1);
+  assert(Array.prototype.push.length === 1);
 
-    var a = ["hello"];
-    var length = a.push();
-    assert(length === 1);
-    assert(a.length === 1);
-    assert(a[0] === "hello");
+  var a = ["hello"];
+  var length = a.push();
+  assert(length === 1);
+  assert(a.length === 1);
+  assert(a[0] === "hello");
 
-    length = a.push("friends");
-    assert(length === 2);
-    assert(a.length === 2);
-    assert(a[0] === "hello");
-    assert(a[1] === "friends");
+  length = a.push("friends");
+  assert(length === 2);
+  assert(a.length === 2);
+  assert(a[0] === "hello");
+  assert(a[1] === "friends");
 
-    length = a.push(1, 2, 3);
-    assert(length === 5);
-    assert(a.length === 5);
-    assert(a[0] === "hello");
-    assert(a[1] === "friends");
-    assert(a[2] === 1);
-    assert(a[3] === 2);
-    assert(a[4] === 3);
+  length = a.push(1, 2, 3);
+  assert(length === 5);
+  assert(a.length === 5);
+  assert(a[0] === "hello");
+  assert(a[1] === "friends");
+  assert(a[2] === 1);
+  assert(a[3] === 2);
+  assert(a[4] === 3);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.reduce.js

@@ -1,104 +1,132 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.reduce.length === 1);
-
-    assertThrowsError(() => {
-        [1].reduce();
-    }, {
-        error: TypeError,
-        message: "Array.prototype.reduce() requires at least one argument"
-    });
-
-    assertThrowsError(() => {
-        [1].reduce(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
-
-    assertThrowsError(() => {
-        [].reduce((a, x) => x);
-    }, {
-        error: TypeError,
-        message: "Reduce of empty array with no initial value"
-    });
-
-    assertThrowsError(() => {
-        [, ,].reduce((a, x) => x);
-    }, {
-        error: TypeError,
-        message: "Reduce of empty array with no initial value"
-    });
-
-    [1, 2].reduce(function () { assert(this === undefined) });
-
-    var callbackCalled = 0;
-    var callback = () => { callbackCalled++; return true };
-
-    assert([1].reduce(callback) === 1);
-    assert(callbackCalled === 0);
-
-    assert([, 1].reduce(callback) === 1);
-    assert(callbackCalled === 0);
-
-    callbackCalled = 0;
-    assert([1, 2, 3].reduce(callback) === true);
-    assert(callbackCalled === 2);
-
-    callbackCalled = 0;
-    assert([, , 1, 2, 3].reduce(callback) === true);
-    assert(callbackCalled === 2);
-
-    callbackCalled = 0;
-    assert([1, , , 10, , 100, , ,].reduce(callback) === true);
-    assert(callbackCalled === 2);
-
-    var constantlySad = () => ":^(";
-    var result = [].reduce(constantlySad, ":^)");
-    assert(result === ":^)");
-
-    result = [":^0"].reduce(constantlySad, ":^)");
-    assert(result === ":^(");
-
-    result = [":^0"].reduce(constantlySad);
-    assert(result === ":^0");
-
-    result = [5, 4, 3, 2, 1].reduce((accum, elem) => accum + elem);
-    assert(result === 15);
-
-    result = [1, 2, 3, 4, 5, 6].reduce((accum, elem) => accum + elem, 100);
-    assert(result === 121);
-
-    result = [6, 5, 4, 3, 2, 1].reduce((accum, elem) => { return accum + elem }, 100);
-    assert(result === 121);
-
-    var indexes = [];
-    result = ["foo", 1, true].reduce((a, v, i) => { indexes.push(i) });
-    assert(result === undefined);
-    assert(indexes.length === 2);
-    assert(indexes[0] === 1);
-    assert(indexes[1] === 2);
-
-    indexes = [];
-    result = ["foo", 1, true].reduce((a, v, i) => { indexes.push(i) }, "foo");
-    assert(result === undefined);
-    assert(indexes.length === 3);
-    assert(indexes[0] === 0);
-    assert(indexes[1] === 1);
-    assert(indexes[2] === 2);
-
-    var mutable = { prop: 0 };
-    result = ["foo", 1, true].reduce((a, v) => { a.prop = v; return a; }, mutable);
-    assert(result === mutable);
-    assert(result.prop === true);
-
-    var a1 = [1, 2];
-    var a2 = null;
-    a1.reduce((a, v, i, t) => { a2 = t });
-    assert(a1 === a2);
-
-    console.log("PASS");
+  assert(Array.prototype.reduce.length === 1);
+
+  assertThrowsError(
+    () => {
+      [1].reduce();
+    },
+    {
+      error: TypeError,
+      message: "Array.prototype.reduce() requires at least one argument",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [1].reduce(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [].reduce((a, x) => x);
+    },
+    {
+      error: TypeError,
+      message: "Reduce of empty array with no initial value",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [, ,].reduce((a, x) => x);
+    },
+    {
+      error: TypeError,
+      message: "Reduce of empty array with no initial value",
+    }
+  );
+
+  [1, 2].reduce(function () {
+    assert(this === undefined);
+  });
+
+  var callbackCalled = 0;
+  var callback = () => {
+    callbackCalled++;
+    return true;
+  };
+
+  assert([1].reduce(callback) === 1);
+  assert(callbackCalled === 0);
+
+  assert([, 1].reduce(callback) === 1);
+  assert(callbackCalled === 0);
+
+  callbackCalled = 0;
+  assert([1, 2, 3].reduce(callback) === true);
+  assert(callbackCalled === 2);
+
+  callbackCalled = 0;
+  assert([, , 1, 2, 3].reduce(callback) === true);
+  assert(callbackCalled === 2);
+
+  callbackCalled = 0;
+  assert([1, , , 10, , 100, , ,].reduce(callback) === true);
+  assert(callbackCalled === 2);
+
+  var constantlySad = () => ":^(";
+  var result = [].reduce(constantlySad, ":^)");
+  assert(result === ":^)");
+
+  result = [":^0"].reduce(constantlySad, ":^)");
+  assert(result === ":^(");
+
+  result = [":^0"].reduce(constantlySad);
+  assert(result === ":^0");
+
+  result = [5, 4, 3, 2, 1].reduce((accum, elem) => accum + elem);
+  assert(result === 15);
+
+  result = [1, 2, 3, 4, 5, 6].reduce((accum, elem) => accum + elem, 100);
+  assert(result === 121);
+
+  result = [6, 5, 4, 3, 2, 1].reduce((accum, elem) => {
+    return accum + elem;
+  }, 100);
+  assert(result === 121);
+
+  var indexes = [];
+  result = ["foo", 1, true].reduce((a, v, i) => {
+    indexes.push(i);
+  });
+  assert(result === undefined);
+  assert(indexes.length === 2);
+  assert(indexes[0] === 1);
+  assert(indexes[1] === 2);
+
+  indexes = [];
+  result = ["foo", 1, true].reduce((a, v, i) => {
+    indexes.push(i);
+  }, "foo");
+  assert(result === undefined);
+  assert(indexes.length === 3);
+  assert(indexes[0] === 0);
+  assert(indexes[1] === 1);
+  assert(indexes[2] === 2);
+
+  var mutable = { prop: 0 };
+  result = ["foo", 1, true].reduce((a, v) => {
+    a.prop = v;
+    return a;
+  }, mutable);
+  assert(result === mutable);
+  assert(result.prop === true);
+
+  var a1 = [1, 2];
+  var a2 = null;
+  a1.reduce((a, v, i, t) => {
+    a2 = t;
+  });
+  assert(a1 === a2);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.reverse.js

@@ -1,31 +1,31 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.reverse.length === 0);
-
-    var array = [1, 2, 3];
-    
-    assert(array[0] === 1);
-    assert(array[1] === 2);
-    assert(array[2] === 3);
-    
-    array.reverse();
-    
-    assert(array[0] === 3);
-    assert(array[1] === 2);
-    assert(array[2] === 1);
-    
-    var array_ref = array.reverse();
-    
-    assert(array_ref[0] === 1);
-    assert(array_ref[1] === 2);
-    assert(array_ref[2] === 3);
-
-    assert(array[0] === 1);
-    assert(array[1] === 2);
-    assert(array[2] === 3);
-
-    console.log("PASS");
+  assert(Array.prototype.reverse.length === 0);
+
+  var array = [1, 2, 3];
+
+  assert(array[0] === 1);
+  assert(array[1] === 2);
+  assert(array[2] === 3);
+
+  array.reverse();
+
+  assert(array[0] === 3);
+  assert(array[1] === 2);
+  assert(array[2] === 1);
+
+  var array_ref = array.reverse();
+
+  assert(array_ref[0] === 1);
+  assert(array_ref[1] === 2);
+  assert(array_ref[2] === 3);
+
+  assert(array[0] === 1);
+  assert(array[1] === 2);
+  assert(array[2] === 3);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.shift.js

@@ -1,21 +1,21 @@
 load("test-common.js");
 
 try {
-    var a = [1, 2, 3];
-    var value = a.shift();
-    assert(value === 1);
-    assert(a.length === 2);
-    assert(a[0] === 2);
-    assert(a[1] === 3);
+  var a = [1, 2, 3];
+  var value = a.shift();
+  assert(value === 1);
+  assert(a.length === 2);
+  assert(a[0] === 2);
+  assert(a[1] === 3);
 
-    var a = [];
-    var value = a.shift();
-    assert(value === undefined);
-    assert(a.length === 0);
+  var a = [];
+  var value = a.shift();
+  assert(value === undefined);
+  assert(a.length === 0);
 
-    assert([,].shift() === undefined);
+  assert([,].shift() === undefined);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.slice.js

@@ -1,53 +1,53 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.slice.length === 2);
-
-    var array = ["hello", "friends", "serenity", 1];
-
-    var array_slice = array.slice();
-    assert(array_slice.length === array.length);
-    assert(array_slice.length === 4);
-    assert(array_slice[0] === "hello");
-    assert(array_slice[1] === "friends");
-    assert(array_slice[2] === "serenity");
-    assert(array_slice[3] === 1);
-
-    array_slice = array.slice(1)
-    assert(array_slice.length === 3);
-    assert(array_slice[0] === "friends");
-    assert(array_slice[1] === "serenity");
-    assert(array_slice[2] === 1);
-
-    array_slice = array.slice(0, 2);
-    assert(array_slice.length === 2);
-    assert(array_slice[0] === "hello");
-    assert(array_slice[1] === "friends");
-
-    array_slice = array.slice(-1);
-    assert(array_slice.length === 1);
-    assert(array_slice[0] === 1);
-
-    array_slice = array.slice(1, 1);
-    assert(array_slice.length === 0);
-    
-    array_slice = array.slice(1, -1);
-    assert(array_slice.length === 2);
-    assert(array_slice[0] === "friends");
-    assert(array_slice[1] === "serenity");
-    
-    array_slice = array.slice(2, -1);
-    assert(array_slice.length === 1);
-    assert(array_slice[0] === "serenity");
-
-    array_slice = array.slice(0, 100);
-    assert(array_slice.length === 4);
-    assert(array_slice[0] === "hello");
-    assert(array_slice[1] === "friends");
-    assert(array_slice[2] === "serenity");
-    assert(array_slice[3] === 1);
-
-    console.log("PASS");
+  assert(Array.prototype.slice.length === 2);
+
+  var array = ["hello", "friends", "serenity", 1];
+
+  var array_slice = array.slice();
+  assert(array_slice.length === array.length);
+  assert(array_slice.length === 4);
+  assert(array_slice[0] === "hello");
+  assert(array_slice[1] === "friends");
+  assert(array_slice[2] === "serenity");
+  assert(array_slice[3] === 1);
+
+  array_slice = array.slice(1);
+  assert(array_slice.length === 3);
+  assert(array_slice[0] === "friends");
+  assert(array_slice[1] === "serenity");
+  assert(array_slice[2] === 1);
+
+  array_slice = array.slice(0, 2);
+  assert(array_slice.length === 2);
+  assert(array_slice[0] === "hello");
+  assert(array_slice[1] === "friends");
+
+  array_slice = array.slice(-1);
+  assert(array_slice.length === 1);
+  assert(array_slice[0] === 1);
+
+  array_slice = array.slice(1, 1);
+  assert(array_slice.length === 0);
+
+  array_slice = array.slice(1, -1);
+  assert(array_slice.length === 2);
+  assert(array_slice[0] === "friends");
+  assert(array_slice[1] === "serenity");
+
+  array_slice = array.slice(2, -1);
+  assert(array_slice.length === 1);
+  assert(array_slice[0] === "serenity");
+
+  array_slice = array.slice(0, 100);
+  assert(array_slice.length === 4);
+  assert(array_slice[0] === "hello");
+  assert(array_slice[1] === "friends");
+  assert(array_slice[2] === "serenity");
+  assert(array_slice[3] === 1);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.some.js

@@ -1,34 +1,37 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.some.length === 1);
+  assert(Array.prototype.some.length === 1);
 
-    assertThrowsError(() => {
-        [].some(undefined);
-    }, {
-        error: TypeError,
-        message: "undefined is not a function"
-    });
+  assertThrowsError(
+    () => {
+      [].some(undefined);
+    },
+    {
+      error: TypeError,
+      message: "undefined is not a function",
+    }
+  );
 
-    var array = ["hello", "friends", 1, 2, false, -42, { name: "serenityos"}];
+  var array = ["hello", "friends", 1, 2, false, -42, { name: "serenityos" }];
 
-    assert(array.some(value => value === "hello") === true);
-    assert(array.some(value => value === "serenity") === false);
-    assert(array.some((value, index, arr) => index === 1) === true);
-    assert(array.some(value => value == "1") === true);
-    assert(array.some(value => value === 1) === true);
-    assert(array.some(value => value === 13) === false);
-    assert(array.some(value => typeof(value) !== "string") === true);
-    assert(array.some(value => typeof(value) === "boolean") === true);
-    assert(array.some(value => value > 1) === true);
-    assert(array.some(value => value > 1 && value < 3) === true);
-    assert(array.some(value => value > 100) === false);
-    assert(array.some(value => value < 0) === true);
-    assert(array.some(value => array.pop()) === true);
-    assert(["", "hello", "friends", "serenity"].some(value => value.length === 0) === true);
-    assert([].some(value => value === 1) === false);
+  assert(array.some(value => value === "hello") === true);
+  assert(array.some(value => value === "serenity") === false);
+  assert(array.some((value, index, arr) => index === 1) === true);
+  assert(array.some(value => value == "1") === true);
+  assert(array.some(value => value === 1) === true);
+  assert(array.some(value => value === 13) === false);
+  assert(array.some(value => typeof value !== "string") === true);
+  assert(array.some(value => typeof value === "boolean") === true);
+  assert(array.some(value => value > 1) === true);
+  assert(array.some(value => value > 1 && value < 3) === true);
+  assert(array.some(value => value > 100) === false);
+  assert(array.some(value => value < 0) === true);
+  assert(array.some(value => array.pop()) === true);
+  assert(["", "hello", "friends", "serenity"].some(value => value.length === 0) === true);
+  assert([].some(value => value === 1) === false);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.splice.js

@@ -1,87 +1,87 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.splice.length === 2);
+  assert(Array.prototype.splice.length === 2);
 
-    var array = ["hello", "friends", "serenity", 1, 2];
-    var removed = array.splice(3);
-    assert(array.length === 3);
-    assert(array[0] === "hello");
-    assert(array[1] === "friends");
-    assert(array[2] === "serenity");
-    assert(removed.length === 2);
-    assert(removed[0] === 1);
-    assert(removed[1] === 2);
+  var array = ["hello", "friends", "serenity", 1, 2];
+  var removed = array.splice(3);
+  assert(array.length === 3);
+  assert(array[0] === "hello");
+  assert(array[1] === "friends");
+  assert(array[2] === "serenity");
+  assert(removed.length === 2);
+  assert(removed[0] === 1);
+  assert(removed[1] === 2);
 
-    array = ["hello", "friends", "serenity", 1, 2];
-    removed = array.splice(-2);
-    assert(array.length === 3);
-    assert(array[0] === "hello");
-    assert(array[1] === "friends");
-    assert(array[2] === "serenity");
-    assert(removed.length === 2);
-    assert(removed[0] === 1);
-    assert(removed[1] === 2);
+  array = ["hello", "friends", "serenity", 1, 2];
+  removed = array.splice(-2);
+  assert(array.length === 3);
+  assert(array[0] === "hello");
+  assert(array[1] === "friends");
+  assert(array[2] === "serenity");
+  assert(removed.length === 2);
+  assert(removed[0] === 1);
+  assert(removed[1] === 2);
 
-    array = ["hello", "friends", "serenity", 1, 2];
-    removed = array.splice(-2, 1);
-    assert(array.length === 4);
-    assert(array[0] === "hello");
-    assert(array[1] === "friends");
-    assert(array[2] === "serenity");
-    assert(array[3] === 2);
-    assert(removed.length === 1);
-    assert(removed[0] === 1);
+  array = ["hello", "friends", "serenity", 1, 2];
+  removed = array.splice(-2, 1);
+  assert(array.length === 4);
+  assert(array[0] === "hello");
+  assert(array[1] === "friends");
+  assert(array[2] === "serenity");
+  assert(array[3] === 2);
+  assert(removed.length === 1);
+  assert(removed[0] === 1);
 
-    array = ["serenity"];
-    removed = array.splice(0, 0, "hello", "friends");
-    assert(array.length === 3);
-    assert(array[0] === "hello");
-    assert(array[1] === "friends");
-    assert(array[2] === "serenity");
-    assert(removed.length === 0);
+  array = ["serenity"];
+  removed = array.splice(0, 0, "hello", "friends");
+  assert(array.length === 3);
+  assert(array[0] === "hello");
+  assert(array[1] === "friends");
+  assert(array[2] === "serenity");
+  assert(removed.length === 0);
 
-    array = ["goodbye", "friends", "serenity"];
-    removed = array.splice(0, 1, "hello");
-    assert(array.length === 3);
-    assert(array[0] === "hello");
-    assert(array[1] === "friends");
-    assert(array[2] === "serenity");
-    assert(removed.length === 1);
-    assert(removed[0] === "goodbye");
+  array = ["goodbye", "friends", "serenity"];
+  removed = array.splice(0, 1, "hello");
+  assert(array.length === 3);
+  assert(array[0] === "hello");
+  assert(array[1] === "friends");
+  assert(array[2] === "serenity");
+  assert(removed.length === 1);
+  assert(removed[0] === "goodbye");
 
-    array = ["foo", "bar", "baz"];
-    removed = array.splice();
-    assert(array.length === 3);
-    assert(array[0] === "foo");
-    assert(array[1] === "bar");
-    assert(array[2] === "baz");
-    assert(removed.length === 0);
+  array = ["foo", "bar", "baz"];
+  removed = array.splice();
+  assert(array.length === 3);
+  assert(array[0] === "foo");
+  assert(array[1] === "bar");
+  assert(array[2] === "baz");
+  assert(removed.length === 0);
 
-    removed = array.splice(0, 123);
-    assert(array.length === 0);
-    assert(removed.length === 3);
-    assert(removed[0] === "foo");
-    assert(removed[1] === "bar");
-    assert(removed[2] === "baz");
+  removed = array.splice(0, 123);
+  assert(array.length === 0);
+  assert(removed.length === 3);
+  assert(removed[0] === "foo");
+  assert(removed[1] === "bar");
+  assert(removed[2] === "baz");
 
-    array = ["foo", "bar", "baz"];
-    removed = array.splice(123, 123);
-    assert(array.length === 3);
-    assert(array[0] === "foo");
-    assert(array[1] === "bar");
-    assert(array[2] === "baz");
-    assert(removed.length === 0);
+  array = ["foo", "bar", "baz"];
+  removed = array.splice(123, 123);
+  assert(array.length === 3);
+  assert(array[0] === "foo");
+  assert(array[1] === "bar");
+  assert(array[2] === "baz");
+  assert(removed.length === 0);
 
-    array = ["foo", "bar", "baz"];
-    removed = array.splice(-123, 123);
-    assert(array.length === 0);
-    assert(removed.length === 3);
-    assert(removed[0] === "foo");
-    assert(removed[1] === "bar");
-    assert(removed[2] === "baz");
+  array = ["foo", "bar", "baz"];
+  removed = array.splice(-123, 123);
+  assert(array.length === 0);
+  assert(removed.length === 3);
+  assert(removed[0] === "foo");
+  assert(removed[1] === "bar");
+  assert(removed[2] === "baz");
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.toLocaleString.js

@@ -1,24 +1,24 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.toLocaleString.length === 0);
+  assert(Array.prototype.toLocaleString.length === 0);
 
-    assert([].toLocaleString() === "");
-    assert(["foo"].toLocaleString() === "foo");
-    assert(["foo", "bar"].toLocaleString() === "foo,bar");
-    assert(["foo", undefined, "bar", null, "baz"].toLocaleString() === "foo,,bar,,baz");
+  assert([].toLocaleString() === "");
+  assert(["foo"].toLocaleString() === "foo");
+  assert(["foo", "bar"].toLocaleString() === "foo,bar");
+  assert(["foo", undefined, "bar", null, "baz"].toLocaleString() === "foo,,bar,,baz");
 
-    var toStringCalled = 0;
-    var o = {
-        toString: () => {
-            toStringCalled++;
-            return "o";
-        }
-    };
-    assert([o, undefined, o, null, o].toLocaleString() === "o,,o,,o");
-    assert(toStringCalled === 3);
+  var toStringCalled = 0;
+  var o = {
+    toString: () => {
+      toStringCalled++;
+      return "o";
+    },
+  };
+  assert([o, undefined, o, null, o].toLocaleString() === "o,,o,,o");
+  assert(toStringCalled === 3);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.toString.js

@@ -1,22 +1,22 @@
 load("test-common.js");
 
 try {
-    var a = [1, 2, 3];
-    assert(a.toString() === '1,2,3');
-    assert([].toString() === '');
-    assert([5].toString() === '5');
+  var a = [1, 2, 3];
+  assert(a.toString() === "1,2,3");
+  assert([].toString() === "");
+  assert([5].toString() === "5");
 
-    assert("rgb(" + [10, 11, 12] + ")" === "rgb(10,11,12)");
+  assert("rgb(" + [10, 11, 12] + ")" === "rgb(10,11,12)");
 
-    assert([undefined, null].toString() === ",");
+  assert([undefined, null].toString() === ",");
 
-    a = new Array(5);
-    assert(a.toString() === ",,,,");
-    a[2] = "foo";
-    a[4] = "bar";
-    assert(a.toString() === ",,foo,,bar");
+  a = new Array(5);
+  assert(a.toString() === ",,,,");
+  a[2] = "foo";
+  a[4] = "bar";
+  assert(a.toString() === ",,foo,,bar");
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/Array.prototype.unshift.js

@@ -1,30 +1,30 @@
 load("test-common.js");
 
 try {
-    assert(Array.prototype.unshift.length === 1);
+  assert(Array.prototype.unshift.length === 1);
 
-    var a = ["hello"];
-    var length = a.unshift();
-    assert(length === 1);
-    assert(a.length === 1);
-    assert(a[0] === "hello");
+  var a = ["hello"];
+  var length = a.unshift();
+  assert(length === 1);
+  assert(a.length === 1);
+  assert(a[0] === "hello");
 
-    length = a.unshift("friends");
-    assert(length === 2);
-    assert(a.length === 2);
-    assert(a[0] === "friends");
-    assert(a[1] === "hello");
+  length = a.unshift("friends");
+  assert(length === 2);
+  assert(a.length === 2);
+  assert(a[0] === "friends");
+  assert(a[1] === "hello");
 
-    length = a.unshift(1, 2, 3);
-    assert(length === 5);
-    assert(a.length === 5);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-    assert(a[3] === "friends");
-    assert(a[4] === "hello");
+  length = a.unshift(1, 2, 3);
+  assert(length === 5);
+  assert(a.length === 5);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+  assert(a[3] === "friends");
+  assert(a[4] === "hello");
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/array-basic.js

@@ -1,63 +1,63 @@
 load("test-common.js");
 
 try {
-    var a = [1, 2, 3];
-
-    assert(typeof a === "object");
-    assert(a.length === 3);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-
-    a[1] = 5;
-    assert(a[1] === 5);
-    assert(a.length === 3);
-
-    a.push(7);
-    assert(a[3] === 7);
-    assert(a.length === 4);
-
-    a = [,];
-    assert(a.length === 1);
-    assert(a.toString() === "");
-    assert(a[0] === undefined);
-
-    a = [,,,,];
-    assert(a.length === 4);
-    assert(a.toString() === ",,,");
-    assert(a[0] === undefined);
-    assert(a[1] === undefined);
-    assert(a[2] === undefined);
-    assert(a[3] === undefined);
-
-    a = [1,,2,,,3,];
-    assert(a.length === 6);
-    assert(a.toString() === "1,,2,,,3");
-    assert(a[0] === 1);
-    assert(a[1] === undefined);
-    assert(a[2] === 2);
-    assert(a[3] === undefined);
-    assert(a[4] === undefined);
-    assert(a[5] === 3);
-
-    a = [1,,2,,,3,];
-    Object.defineProperty(a, 1, {
-        get() {
-            return this.secret_prop;
-        },
-        set(value) {
-            this.secret_prop = value;
-        },
-    });
-    assert(a.length === 6);
-    assert(a.toString() === "1,,2,,,3");
-    assert(a.secret_prop === undefined);
-    a[1] = 20;
-    assert(a.length === 6);
-    assert(a.toString() === "1,20,2,,,3");
-    assert(a.secret_prop === 20);
-
-    console.log("PASS");
+  var a = [1, 2, 3];
+
+  assert(typeof a === "object");
+  assert(a.length === 3);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+
+  a[1] = 5;
+  assert(a[1] === 5);
+  assert(a.length === 3);
+
+  a.push(7);
+  assert(a[3] === 7);
+  assert(a.length === 4);
+
+  a = [,];
+  assert(a.length === 1);
+  assert(a.toString() === "");
+  assert(a[0] === undefined);
+
+  a = [, , , ,];
+  assert(a.length === 4);
+  assert(a.toString() === ",,,");
+  assert(a[0] === undefined);
+  assert(a[1] === undefined);
+  assert(a[2] === undefined);
+  assert(a[3] === undefined);
+
+  a = [1, , 2, , , 3];
+  assert(a.length === 6);
+  assert(a.toString() === "1,,2,,,3");
+  assert(a[0] === 1);
+  assert(a[1] === undefined);
+  assert(a[2] === 2);
+  assert(a[3] === undefined);
+  assert(a[4] === undefined);
+  assert(a[5] === 3);
+
+  a = [1, , 2, , , 3];
+  Object.defineProperty(a, 1, {
+    get() {
+      return this.secret_prop;
+    },
+    set(value) {
+      this.secret_prop = value;
+    },
+  });
+  assert(a.length === 6);
+  assert(a.toString() === "1,,2,,,3");
+  assert(a.secret_prop === undefined);
+  a[1] = 20;
+  assert(a.length === 6);
+  assert(a.toString() === "1,20,2,,,3");
+  assert(a.secret_prop === 20);
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/array-length-setter.js

@@ -1,48 +1,51 @@
 load("test-common.js");
 
 try {
-    var a = [1, 2, 3];
-
-    assert(a.length === 3);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-
-    a.length = 5;
-    assert(a.length === 5);
-    assert(a[0] === 1);
-    assert(a[1] === 2);
-    assert(a[2] === 3);
-    assert(a[3] === undefined);
-    assert(a[4] === undefined);
-
-    a.length = 1;
+  var a = [1, 2, 3];
+
+  assert(a.length === 3);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+
+  a.length = 5;
+  assert(a.length === 5);
+  assert(a[0] === 1);
+  assert(a[1] === 2);
+  assert(a[2] === 3);
+  assert(a[3] === undefined);
+  assert(a[4] === undefined);
+
+  a.length = 1;
+  assert(a.length === 1);
+  assert(a[0] === 1);
+
+  a.length = 0;
+  assert(a.length === 0);
+
+  a.length = "42";
+  assert(a.length === 42);
+
+  a.length = [];
+  assert(a.length === 0);
+
+  a.length = true;
+  assert(a.length === 1);
+
+  [undefined, "foo", -1, Infinity, -Infinity, NaN].forEach(value => {
+    assertThrowsError(
+      () => {
+        a.length = value;
+      },
+      {
+        error: RangeError,
+        message: "Invalid array length",
+      }
+    );
     assert(a.length === 1);
-    assert(a[0] === 1);
+  });
 
-    a.length = 0;
-    assert(a.length === 0);
-
-    a.length = "42";
-    assert(a.length === 42);
-
-    a.length = [];
-    assert(a.length === 0);
-
-    a.length = true;
-    assert(a.length === 1);
-
-    [undefined, "foo", -1, Infinity, -Infinity, NaN].forEach(value => {
-        assertThrowsError(() => {
-            a.length = value;
-        }, {
-            error: RangeError,
-            message: "Invalid array length"
-        });
-        assert(a.length === 1);
-    });
-
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/array-shrink-during-find-crash.js

@@ -1,25 +1,25 @@
 load("test-common.js");
 
 try {
-    var a, callbackCalled;
+  var a, callbackCalled;
 
-    callbackCalled = 0;
-    a = [1, 2, 3, 4, 5];
-    a.find(() => {
-        callbackCalled++;
-        a.pop();
-    });
-    assert(callbackCalled === 5);
+  callbackCalled = 0;
+  a = [1, 2, 3, 4, 5];
+  a.find(() => {
+    callbackCalled++;
+    a.pop();
+  });
+  assert(callbackCalled === 5);
 
-    callbackCalled = 0;
-    a = [1, 2, 3, 4, 5];
-    a.findIndex(() => {
-        callbackCalled++;
-        a.pop();
-    });
-    assert(callbackCalled === 5);
+  callbackCalled = 0;
+  a = [1, 2, 3, 4, 5];
+  a.findIndex(() => {
+    callbackCalled++;
+    a.pop();
+  });
+  assert(callbackCalled === 5);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Array/array-spread.js

@@ -1,44 +1,45 @@
 load("test-common.js");
 
 function testArray(arr) {
-    return arr.length === 4 &&
-        arr[0] === 0 &&
-        arr[1] === 1 &&
-        arr[2] === 2 &&
-        arr[3] === 3;
+  return arr.length === 4 && arr[0] === 0 && arr[1] === 1 && arr[2] === 2 && arr[3] === 3;
 }
 
 try {
-    let arr = [0, ...[1, 2], 3];
-    assert(testArray(arr));
-
-    let a = [1, 2];
-    arr = [0, ...a, 3];
-    assert(testArray(arr));
-
-    let obj = { a: [1, 2] };
-    arr = [0, ...obj.a, 3];
-    assert(testArray(arr));
-
-    arr = [...[], ...[...[0, 1, 2]], 3];
-    assert(testArray(arr));
-
-    assertThrowsError(() => {
-        [...1];
-    }, {
-        error: TypeError,
-        message: "1 is not iterable",
-    });
-
-
-    assertThrowsError(() => {
-        [...{}];
-    }, {
-        error: TypeError,
-        message: "[object Object] is not iterable",
-    });
-
-    console.log("PASS");
+  let arr = [0, ...[1, 2], 3];
+  assert(testArray(arr));
+
+  let a = [1, 2];
+  arr = [0, ...a, 3];
+  assert(testArray(arr));
+
+  let obj = { a: [1, 2] };
+  arr = [0, ...obj.a, 3];
+  assert(testArray(arr));
+
+  arr = [...[], ...[...[0, 1, 2]], 3];
+  assert(testArray(arr));
+
+  assertThrowsError(
+    () => {
+      [...1];
+    },
+    {
+      error: TypeError,
+      message: "1 is not iterable",
+    }
+  );
+
+  assertThrowsError(
+    () => {
+      [...{}];
+    },
+    {
+      error: TypeError,
+      message: "[object Object] is not iterable",
+    }
+  );
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/BigInt.asIntN.js

@@ -1,9 +1,9 @@
 load("test-common.js");
 
 try {
-    assert(BigInt.asIntN.length === 2);
+  assert(BigInt.asIntN.length === 2);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/BigInt.asUintN.js

@@ -1,9 +1,9 @@
 load("test-common.js");
 
 try {
-    assert(BigInt.asUintN.length === 2);
+  assert(BigInt.asUintN.length === 2);
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/BigInt.js

@@ -1,62 +1,78 @@
 load("test-common.js");
 
 try {
-    assert(BigInt.length === 1);
-    assert(BigInt.name === "BigInt");
+  assert(BigInt.length === 1);
+  assert(BigInt.name === "BigInt");
 
-    assert(BigInt(0) === 0n);
-    assert(BigInt(1) === 1n);
-    assert(BigInt(+1) === 1n);
-    assert(BigInt(-1) === -1n);
-    assert(BigInt("") === 0n);
-    assert(BigInt("0") === 0n);
-    assert(BigInt("1") === 1n);
-    assert(BigInt("+1") === 1n);
-    assert(BigInt("-1") === -1n);
-    assert(BigInt("-1") === -1n);
-    assert(BigInt([]) === 0n);
-    assert(BigInt("42") === 42n);
-    assert(BigInt("  \n  00100  \n  ") === 100n);
-    assert(BigInt(123n) === 123n);
-    assert(BigInt("3323214327642987348732109829832143298746432437532197321") === 3323214327642987348732109829832143298746432437532197321n);
+  assert(BigInt(0) === 0n);
+  assert(BigInt(1) === 1n);
+  assert(BigInt(+1) === 1n);
+  assert(BigInt(-1) === -1n);
+  assert(BigInt("") === 0n);
+  assert(BigInt("0") === 0n);
+  assert(BigInt("1") === 1n);
+  assert(BigInt("+1") === 1n);
+  assert(BigInt("-1") === -1n);
+  assert(BigInt("-1") === -1n);
+  assert(BigInt([]) === 0n);
+  assert(BigInt("42") === 42n);
+  assert(BigInt("  \n  00100  \n  ") === 100n);
+  assert(BigInt(123n) === 123n);
+  assert(
+    BigInt("3323214327642987348732109829832143298746432437532197321") ===
+      3323214327642987348732109829832143298746432437532197321n
+  );
 
-    assertThrowsError(() => {
-        new BigInt();
-    }, {
-        error: TypeError,
-        message: "BigInt is not a constructor"
-    });
+  assertThrowsError(
+    () => {
+      new BigInt();
+    },
+    {
+      error: TypeError,
+      message: "BigInt is not a constructor",
+    }
+  );
 
-    [null, undefined, Symbol()].forEach(value => {
-        assertThrowsError(() => {
-            BigInt(value);
-        }, {
-            error: TypeError,
-            message: typeof value === "symbol"
-                ? "Cannot convert symbol to BigInt"
-                : `Cannot convert ${value} to BigInt`
-        });
-    });
+  [null, undefined, Symbol()].forEach(value => {
+    assertThrowsError(
+      () => {
+        BigInt(value);
+      },
+      {
+        error: TypeError,
+        message:
+          typeof value === "symbol"
+            ? "Cannot convert symbol to BigInt"
+            : `Cannot convert ${value} to BigInt`,
+      }
+    );
+  });
 
-    ["foo", "123n", "1+1", {}, function () { }].forEach(value => {
-        assertThrowsError(() => {
-            BigInt(value);
-        }, {
-            error: SyntaxError,
-            message: `Invalid value for BigInt: ${value}`
-        });
-    });
+  ["foo", "123n", "1+1", {}, function () {}].forEach(value => {
+    assertThrowsError(
+      () => {
+        BigInt(value);
+      },
+      {
+        error: SyntaxError,
+        message: `Invalid value for BigInt: ${value}`,
+      }
+    );
+  });
 
-    [1.23, Infinity, -Infinity, NaN].forEach(value => {
-        assertThrowsError(() => {
-            BigInt(value);
-        }, {
-            error: RangeError,
-            message: "BigInt argument must be an integer"
-        });
-    });
+  [1.23, Infinity, -Infinity, NaN].forEach(value => {
+    assertThrowsError(
+      () => {
+        BigInt(value);
+      },
+      {
+        error: RangeError,
+        message: "BigInt argument must be an integer",
+      }
+    );
+  });
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.toLocaleString.js

@@ -1,18 +1,21 @@
 load("test-common.js");
 
 try {
-    assert(BigInt.prototype.toLocaleString.length === 0);
+  assert(BigInt.prototype.toLocaleString.length === 0);
 
-    assertThrowsError(() => {
-        BigInt.prototype.toLocaleString.call("foo");
-    }, {
-        error: TypeError,
-        message: "Not a BigInt object"
-    });
-    
-    assert(BigInt(123).toLocaleString() === "123");
+  assertThrowsError(
+    () => {
+      BigInt.prototype.toLocaleString.call("foo");
+    },
+    {
+      error: TypeError,
+      message: "Not a BigInt object",
+    }
+  );
 
-    console.log("PASS");
+  assert(BigInt(123).toLocaleString() === "123");
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.toString.js

@@ -1,18 +1,21 @@
 load("test-common.js");
 
 try {
-    assert(BigInt.prototype.toString.length === 0);
+  assert(BigInt.prototype.toString.length === 0);
 
-    assertThrowsError(() => {
-        BigInt.prototype.toString.call("foo");
-    }, {
-        error: TypeError,
-        message: "Not a BigInt object"
-    });
-    
-    assert(BigInt(123).toString() === "123");
+  assertThrowsError(
+    () => {
+      BigInt.prototype.toString.call("foo");
+    },
+    {
+      error: TypeError,
+      message: "Not a BigInt object",
+    }
+  );
 
-    console.log("PASS");
+  assert(BigInt(123).toString() === "123");
+
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/BigInt.prototype.valueOf.js

@@ -1,20 +1,23 @@
 load("test-common.js");
 
 try {
-    assert(BigInt.prototype.valueOf.length === 0);
+  assert(BigInt.prototype.valueOf.length === 0);
 
-    assertThrowsError(() => {
-        BigInt.prototype.valueOf.call("foo");
-    }, {
-        error: TypeError,
-        message: "Not a BigInt object"
-    });
+  assertThrowsError(
+    () => {
+      BigInt.prototype.valueOf.call("foo");
+    },
+    {
+      error: TypeError,
+      message: "Not a BigInt object",
+    }
+  );
 
-    assert(typeof BigInt(123).valueOf() === "bigint");
-    // FIXME: Uncomment once we support Object() with argument
-    // assert(typeof Object(123n).valueOf() === "bigint");
+  assert(typeof BigInt(123).valueOf() === "bigint");
+  // FIXME: Uncomment once we support Object() with argument
+  // assert(typeof Object(123n).valueOf() === "bigint");
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/bigint-basic.js

@@ -1,68 +1,74 @@
 load("test-common.js");
 
 try {
-    var bigint = 123n;
+  var bigint = 123n;
 
-    assert(typeof bigint === "bigint");
-    assert(-bigint === -123n);
-    assert("" + bigint === "123")
+  assert(typeof bigint === "bigint");
+  assert(-bigint === -123n);
+  assert("" + bigint === "123");
 
-    assertThrowsError(() => {
-        +bigint;
-    }, {
-        error: TypeError,
-        message: "Cannot convert BigInt to number"
-    });
+  assertThrowsError(
+    () => {
+      +bigint;
+    },
+    {
+      error: TypeError,
+      message: "Cannot convert BigInt to number",
+    }
+  );
 
-    assert(12n + 34n === 46n);
-    assert(12n - 34n === -22n);
-    assert(8n * 12n === 96n);
-    assert(123n / 10n === 12n);
-    assert(2n ** 3n === 8n);
-    assert(5n % 3n === 2n);
-    assert(45977665298704210987n + 714320987142450987412098743217984576n / 4598741987421098765327980n * 987498743n === 199365500239020623962n);
+  assert(12n + 34n === 46n);
+  assert(12n - 34n === -22n);
+  assert(8n * 12n === 96n);
+  assert(123n / 10n === 12n);
+  assert(2n ** 3n === 8n);
+  assert(5n % 3n === 2n);
+  assert(
+    45977665298704210987n +
+      (714320987142450987412098743217984576n / 4598741987421098765327980n) * 987498743n ===
+      199365500239020623962n
+  );
 
-    assert((12n & 5n) === 4n);
-    assert((1n | 2n) === 3n);
-    assert((5n ^ 3n) === 6n);
-    assert(~1n === -2n);
+  assert((12n & 5n) === 4n);
+  assert((1n | 2n) === 3n);
+  assert((5n ^ 3n) === 6n);
+  assert(~1n === -2n);
 
-    bigint = 1n;
-    assert(bigint++ === 1n);
-    assert(bigint === 2n);
-    assert(bigint-- === 2n);
-    assert(bigint === 1n);
-    assert(++bigint === 2n);
-    assert(bigint === 2n);
-    assert(--bigint === 1n);
-    assert(bigint === 1n);
+  bigint = 1n;
+  assert(bigint++ === 1n);
+  assert(bigint === 2n);
+  assert(bigint-- === 2n);
+  assert(bigint === 1n);
+  assert(++bigint === 2n);
+  assert(bigint === 2n);
+  assert(--bigint === 1n);
+  assert(bigint === 1n);
 
+  assert((1n == 1n) === true);
+  assert((1n == 1) === true);
+  assert((1 == 1n) === true);
+  assert((1n == 1.23) === false);
+  assert((1.23 == 1n) === false);
 
-    assert((1n == 1n) === true);
-    assert((1n == 1) === true);
-    assert((1 == 1n) === true);
-    assert((1n == 1.23) === false);
-    assert((1.23 == 1n) === false);
+  assert((1n != 1n) === false);
+  assert((1n != 1) === false);
+  assert((1 != 1n) === false);
+  assert((1n != 1.23) === true);
+  assert((1.23 != 1n) === true);
 
-    assert((1n != 1n) === false);
-    assert((1n != 1) === false);
-    assert((1 != 1n) === false);
-    assert((1n != 1.23) === true);
-    assert((1.23 != 1n) === true);
+  assert((1n === 1n) === true);
+  assert((1n === 1) == false);
+  assert((1 === 1n) === false);
+  assert((1n === 1.23) === false);
+  assert((1.23 === 1n) === false);
 
-    assert((1n === 1n) === true);
-    assert((1n === 1) == false);
-    assert((1 === 1n) === false);
-    assert((1n === 1.23) === false);
-    assert((1.23 === 1n) === false);
+  assert((1n !== 1n) === false);
+  assert((1n !== 1) === true);
+  assert((1 !== 1n) === true);
+  assert((1n !== 1.23) === true);
+  assert((1.23 !== 1n) === true);
 
-    assert((1n !== 1n) === false);
-    assert((1n !== 1) === true);
-    assert((1 !== 1n) === true);
-    assert((1n !== 1.23) === true);
-    assert((1.23 !== 1n) === true);
-
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/BigInt/bigint-number-mix-errors.js

@@ -1,82 +1,118 @@
 load("test-common.js");
 
 try {
-    [1, null, undefined].forEach(value => {
-        assertThrowsError(() => {
-            1n + value;
-        }, {
-            error: TypeError,
-            message: "Cannot use addition operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n - value;
-        }, {
-            error: TypeError,
-            message: "Cannot use subtraction operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n * value;
-        }, {
-            error: TypeError,
-            message: "Cannot use multiplication operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n / value;
-        }, {
-            error: TypeError,
-            message: "Cannot use division operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n % value;
-        }, {
-            error: TypeError,
-            message: "Cannot use modulo operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n ** value;
-        }, {
-            error: TypeError,
-            message: "Cannot use exponentiation operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n | value;
-        }, {
-            error: TypeError,
-            message: "Cannot use bitwise OR operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n & value;
-        }, {
-            error: TypeError,
-            message: "Cannot use bitwise AND operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n ^ value;
-        }, {
-            error: TypeError,
-            message: "Cannot use bitwise XOR operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n << value;
-        }, {
-            error: TypeError,
-            message: "Cannot use left-shift operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n >> value;
-        }, {
-            error: TypeError,
-            message: "Cannot use right-shift operator with BigInt and other type"
-        });
-        assertThrowsError(() => {
-            1n >>> value;
-        }, {
-            error: TypeError,
-            message: "Cannot use unsigned right-shift operator with BigInt"
-        });
-    });
+  [1, null, undefined].forEach(value => {
+    assertThrowsError(
+      () => {
+        1n + value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use addition operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n - value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use subtraction operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n * value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use multiplication operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n / value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use division operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n % value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use modulo operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n ** value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use exponentiation operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n | value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use bitwise OR operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n & value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use bitwise AND operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n ^ value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use bitwise XOR operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n << value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use left-shift operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n >> value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use right-shift operator with BigInt and other type",
+      }
+    );
+    assertThrowsError(
+      () => {
+        1n >>> value;
+      },
+      {
+        error: TypeError,
+        message: "Cannot use unsigned right-shift operator with BigInt",
+      }
+    );
+  });
 
-    console.log("PASS");
+  console.log("PASS");
 } catch (e) {
-    console.log("FAIL: " + e);
+  console.log("FAIL: " + e);
 }

Libraries/LibJS/Tests/builtins/Boolean/Boolean.js

@@ -1,32 +1,32 @@
 test("constructor properties", () => {
-    expect(Boolean).toHaveLength(1);
-    expect(Boolean.name).toBe("Boolean");
+  expect(Boolean).toHaveLength(1);
+  expect(Boolean.name).toBe("Boolean");
 });
 
 test("typeof", () => {
-    expect(typeof new Boolean()).toBe("object");
-    expect(typeof Boolean()).toBe("boolean");
-    expect(typeof Boolean(true)).toBe("boolean");
-})
+  expect(typeof new Boolean()).toBe("object");
+  expect(typeof Boolean()).toBe("boolean");
+  expect(typeof Boolean(true)).toBe("boolean");
+});
 
 test("basic functionality", () => {
-    var foo = new Boolean(true);
-    var bar = new Boolean(true);
+  var foo = new Boolean(true);
+  var bar = new Boolean(true);
 
-    expect(foo).not.toBe(bar);
-    expect(foo.valueOf()).toBe(bar.valueOf());
+  expect(foo).not.toBe(bar);
+  expect(foo.valueOf()).toBe(bar.valueOf());
 
-    expect(Boolean()).toBeFalse();
-    expect(Boolean(false)).toBeFalse();
-    expect(Boolean(null)).toBeFalse();
-    expect(Boolean(undefined)).toBeFalse();
-    expect(Boolean(NaN)).toBeFalse();
-    expect(Boolean("")).toBeFalse();
-    expect(Boolean(0.0)).toBeFalse();
-    expect(Boolean(-0.0)).toBeFalse();
-    expect(Boolean(true)).toBeTrue();
-    expect(Boolean("0")).toBeTrue();
-    expect(Boolean({})).toBeTrue();
-    expect(Boolean([])).toBeTrue();
-    expect(Boolean(1)).toBeTrue();
+  expect(Boolean()).toBeFalse();
+  expect(Boolean(false)).toBeFalse();
+  expect(Boolean(null)).toBeFalse();
+  expect(Boolean(undefined)).toBeFalse();
+  expect(Boolean(NaN)).toBeFalse();
+  expect(Boolean("")).toBeFalse();
+  expect(Boolean(0.0)).toBeFalse();
+  expect(Boolean(-0.0)).toBeFalse();
+  expect(Boolean(true)).toBeTrue();
+  expect(Boolean("0")).toBeTrue();
+  expect(Boolean({})).toBeTrue();
+  expect(Boolean([])).toBeTrue();
+  expect(Boolean(1)).toBeTrue();
 });

Libraries/LibJS/Tests/builtins/Boolean/Boolean.prototype.js

@@ -1,5 +1,5 @@
 test("basic functionality", () => {
-    expect(typeof Boolean.prototype).toBe("object");
-    expect(Boolean.prototype.valueOf()).toBeFalse();
-    expect(Boolean.prototype.length).toBeUndefined();
+  expect(typeof Boolean.prototype).toBe("object");
+  expect(Boolean.prototype.valueOf()).toBeFalse();
+  expect(Boolean.prototype).not.toHaveProperty("length");
 });

Libraries/LibJS/Tests/builtins/Boolean/Boolean.prototype.toString.js

@@ -1,17 +1,17 @@
 test("basic functionality", () => {
-    var foo = true;
-    expect(foo.toString()).toBe("true");
-    expect(true.toString()).toBe("true");
+  var foo = true;
+  expect(foo.toString()).toBe("true");
+  expect(true.toString()).toBe("true");
 
-    expect(Boolean.prototype.toString.call(true)).toBe("true");
-    expect(Boolean.prototype.toString.call(false)).toBe("false");
+  expect(Boolean.prototype.toString.call(true)).toBe("true");
+  expect(Boolean.prototype.toString.call(false)).toBe("false");
 
-    expect(new Boolean(true).toString()).toBe("true");
-    expect(new Boolean(false).toString()).toBe("false");
+  expect(new Boolean(true).toString()).toBe("true");
+  expect(new Boolean(false).toString()).toBe("false");
 });
 
 test("errors on non-boolean |this|", () => {
-    expect(() => {
-        Boolean.prototype.toString.call("foo");
-    }).toThrowWithMessage(TypeError, "Not a Boolean object");
+  expect(() => {
+    Boolean.prototype.toString.call("foo");
+  }).toThrowWithMessage(TypeError, "Not a Boolean object");
 });

Libraries/LibJS/Tests/builtins/Boolean/Boolean.prototype.valueOf.js

@@ -1,16 +1,16 @@
 test("basic functionality", () => {
-    var foo = true;
-    expect(foo.valueOf()).toBeTrue();
-    expect(true.valueOf()).toBeTrue();
+  var foo = true;
+  expect(foo.valueOf()).toBeTrue();
+  expect(true.valueOf()).toBeTrue();
 
-    expect(Boolean.prototype.valueOf.call(true)).toBeTrue();
-    expect(Boolean.prototype.valueOf.call(false)).toBeFalse();
+  expect(Boolean.prototype.valueOf.call(true)).toBeTrue();
+  expect(Boolean.prototype.valueOf.call(false)).toBeFalse();
 
-    expect(new Boolean().valueOf()).toBeFalse();
+  expect(new Boolean().valueOf()).toBeFalse();
 });
 
 test("errors on non-boolean |this|", () => {
-    expect(() => {
-        Boolean.prototype.valueOf.call("foo");
-    }).toThrowWithMessage(TypeError, "Not a Boolean object");
+  expect(() => {
+    Boolean.prototype.valueOf.call("foo");
+  }).toThrowWithMessage(TypeError, "Not a Boolean object");
 });

Libraries/LibJS/Tests/builtins/Date/Date.js

@@ -1,5 +1,5 @@
 test("basic functionality", () => {
-    expect(Date).toHaveLength(7);
-    expect(Date.name === "Date");
-    expect(Date.prototype).not.toHaveProperty("length");
+  expect(Date).toHaveLength(7);
+  expect(Date.name === "Date");
+  expect(Date.prototype).not.toHaveProperty("length");
 });

Libraries/LibJS/Tests/builtins/Date/Date.now.js

@@ -1,10 +1,10 @@
 test("basic functionality", () => {
-    var last = 0;
-    for (var i = 0; i < 100; ++i) {
-        var now = Date.now();
-        expect(now).not.toBeNaN();
-        expect(now).toBeGreaterThan(1580000000000);
-        expect(now).toBeGreaterThanOrEqual(last);
-        last = now;
-    }
+  var last = 0;
+  for (var i = 0; i < 100; ++i) {
+    var now = Date.now();
+    expect(now).not.toBeNaN();
+    expect(now).toBeGreaterThan(1580000000000);
+    expect(now).toBeGreaterThanOrEqual(last);
+    last = now;
+  }
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getDate.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    let d = new Date();
-    expect(d.getDate()).toBe(d.getDate());
-    expect(d.getDate()).not.toBeNaN();
-    expect(d.getDate()).toBeGreaterThanOrEqual(1);
-    expect(d.getDate()).toBeLessThanOrEqual(31);
+  let d = new Date();
+  expect(d.getDate()).toBe(d.getDate());
+  expect(d.getDate()).not.toBeNaN();
+  expect(d.getDate()).toBeGreaterThanOrEqual(1);
+  expect(d.getDate()).toBeLessThanOrEqual(31);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getDay.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getDay()).toBe(d.getDay());
-    expect(d.getDay()).not.toBeNaN();
-    expect(d.getDay()).toBeGreaterThanOrEqual(0);
-    expect(d.getDay()).toBeLessThanOrEqual(6);
+  var d = new Date();
+  expect(d.getDay()).toBe(d.getDay());
+  expect(d.getDay()).not.toBeNaN();
+  expect(d.getDay()).toBeGreaterThanOrEqual(0);
+  expect(d.getDay()).toBeLessThanOrEqual(6);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getFullYear.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getFullYear()).toBe(d.getFullYear());
-    expect(d.getFullYear()).not.toBeNaN();
-    expect(d.getFullYear()).toBe(d.getFullYear());
-    expect(d.getFullYear()).toBeGreaterThanOrEqual(2020);
+  var d = new Date();
+  expect(d.getFullYear()).toBe(d.getFullYear());
+  expect(d.getFullYear()).not.toBeNaN();
+  expect(d.getFullYear()).toBe(d.getFullYear());
+  expect(d.getFullYear()).toBeGreaterThanOrEqual(2020);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getHours.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getHours()).toBe(d.getHours());
-    expect(d.getHours()).not.toBeNaN();
-    expect(d.getHours()).toBeGreaterThanOrEqual(0);
-    expect(d.getHours()).toBeLessThanOrEqual(23);
+  var d = new Date();
+  expect(d.getHours()).toBe(d.getHours());
+  expect(d.getHours()).not.toBeNaN();
+  expect(d.getHours()).toBeGreaterThanOrEqual(0);
+  expect(d.getHours()).toBeLessThanOrEqual(23);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getMilliseconds.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getMilliseconds()).toBe(d.getMilliseconds());
-    expect(d.getMilliseconds()).not.toBeNaN();
-    expect(d.getMilliseconds()).toBeGreaterThanOrEqual(0);
-    expect(d.getMilliseconds()).toBeLessThanOrEqual(999);
+  var d = new Date();
+  expect(d.getMilliseconds()).toBe(d.getMilliseconds());
+  expect(d.getMilliseconds()).not.toBeNaN();
+  expect(d.getMilliseconds()).toBeGreaterThanOrEqual(0);
+  expect(d.getMilliseconds()).toBeLessThanOrEqual(999);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getMinutes.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getMinutes()).toBe(d.getMinutes());
-    expect(d.getMinutes()).not.toBeNaN();
-    expect(d.getMinutes()).toBeGreaterThanOrEqual(0);
-    expect(d.getMinutes()).toBeLessThanOrEqual(59);
+  var d = new Date();
+  expect(d.getMinutes()).toBe(d.getMinutes());
+  expect(d.getMinutes()).not.toBeNaN();
+  expect(d.getMinutes()).toBeGreaterThanOrEqual(0);
+  expect(d.getMinutes()).toBeLessThanOrEqual(59);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getMonth.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getMonth()).toBe(d.getMonth());
-    expect(d.getMonth()).not.toBeNaN();
-    expect(d.getMonth()).toBeGreaterThanOrEqual(0);
-    expect(d.getMonth()).toBeLessThanOrEqual(11);
+  var d = new Date();
+  expect(d.getMonth()).toBe(d.getMonth());
+  expect(d.getMonth()).not.toBeNaN();
+  expect(d.getMonth()).toBeGreaterThanOrEqual(0);
+  expect(d.getMonth()).toBeLessThanOrEqual(11);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getSeconds.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getSeconds()).toBe(d.getSeconds());
-    expect(d.getSeconds()).not.toBeNaN();
-    expect(d.getSeconds()).toBeGreaterThanOrEqual(0);
-    expect(d.getSeconds()).toBeLessThanOrEqual(59);
+  var d = new Date();
+  expect(d.getSeconds()).toBe(d.getSeconds());
+  expect(d.getSeconds()).not.toBeNaN();
+  expect(d.getSeconds()).toBeGreaterThanOrEqual(0);
+  expect(d.getSeconds()).toBeLessThanOrEqual(59);
 });

Libraries/LibJS/Tests/builtins/Date/Date.prototype.getTime.js

@@ -1,6 +1,6 @@
 test("basic functionality", () => {
-    var d = new Date();
-    expect(d.getTime()).toBe(d.getTime());
-    expect(d.getTime()).not.toBeNaN();
-    expect(d.getTime()).toBeGreaterThanOrEqual(1580000000000);
+  var d = new Date();
+  expect(d.getTime()).toBe(d.getTime());
+  expect(d.getTime()).not.toBeNaN();
+  expect(d.getTime()).toBeGreaterThanOrEqual(1580000000000);
 });

Libraries/LibJS/Tests/builtins/Error/Error.js

@@ -1,18 +1,18 @@
 test("basic functionality", () => {
-    expect(Error).toHaveLength(1);
-    expect(Error.name).toBe("Error");
+  expect(Error).toHaveLength(1);
+  expect(Error.name).toBe("Error");
 });
 
 test("name", () => {
-    [Error(), Error(undefined), Error("test"), Error(42), Error(null)].forEach(error => {
-        expect(error.name).toBe("Error");
-    });
+  [Error(), Error(undefined), Error("test"), Error(42), Error(null)].forEach(error => {
+    expect(error.name).toBe("Error");
+  });
 });
 
 test("message", () => {
-    expect(Error().message).toBe("");
-    expect(Error(undefined).message).toBe("");
-    expect(Error("test").message).toBe("test");
-    expect(Error(42).message).toBe("42");
-    expect(Error(null).message).toBe("null");
+  expect(Error().message).toBe("");
+  expect(Error(undefined).message).toBe("");
+  expect(Error("test").message).toBe("test");
+  expect(Error(42).message).toBe("42");
+  expect(Error(null).message).toBe("null");
 });

Libraries/LibJS/Tests/builtins/Error/Error.prototype.name.js

@@ -1,10 +1,10 @@
 test("basic functionality", () => {
-    expect(Error.prototype).not.toHaveProperty("length");
-    
-    var changedInstance = new Error("");
-    changedInstance.name = "NewCustomError";
-    expect(changedInstance.name).toBe("NewCustomError");
+  expect(Error.prototype).not.toHaveProperty("length");
 
-    var normalInstance = new Error("");
-    expect(normalInstance.name).toBe("Error");
+  var changedInstance = new Error("");
+  changedInstance.name = "NewCustomError";
+  expect(changedInstance.name).toBe("NewCustomError");
+
+  var normalInstance = new Error("");
+  expect(normalInstance.name).toBe("Error");
 });

Libraries/LibJS/Tests/builtins/Error/Error.prototype.toString.js

@@ -1,7 +1,7 @@
 test("basic functionality", () => {
-    expect(Error().toString()).toBe("Error");
-    expect(Error(undefined).toString()).toBe("Error");
-    expect(Error(null).toString()).toBe("Error: null");
-    expect(Error("test").toString()).toBe("Error: test");
-    expect(Error(42).toString()).toBe("Error: 42");
+  expect(Error().toString()).toBe("Error");
+  expect(Error(undefined).toString()).toBe("Error");
+  expect(Error(null).toString()).toBe("Error: null");
+  expect(Error("test").toString()).toBe("Error: test");
+  expect(Error(42).toString()).toBe("Error: 42");
 });

Libraries/LibJS/Tests/builtins/Function/Function.js

@@ -1,44 +1,49 @@
 describe("correct behavior", () => {
-    test("constructor properties", () => {
-        expect(Function).toHaveLength(1);
-        expect(Function.name).toBe("Function");
-        expect(Function.prototype).toHaveLength(0);
-        expect(Function.prototype.name).toBe("");
-    });
+  test("constructor properties", () => {
+    expect(Function).toHaveLength(1);
+    expect(Function.name).toBe("Function");
+    expect(Function.prototype).toHaveLength(0);
+    expect(Function.prototype.name).toBe("");
+  });
 
-    test("typeof", () => {
-        expect(typeof Function()).toBe("function");
-        expect(typeof new Function()).toBe("function");
-    });
+  test("typeof", () => {
+    expect(typeof Function()).toBe("function");
+    expect(typeof new Function()).toBe("function");
+  });
 
-    test("basic functionality", () => {
-        expect(Function()()).toBe(undefined);
-        expect(new Function()()).toBe(undefined);
-        expect(Function("return 42")()).toBe(42);
-        expect(new Function("return 42")()).toBe(42);
-        expect(new Function("foo", "return foo")(42)).toBe(42);
-        expect(new Function("foo,bar", "return foo + bar")(1, 2)).toBe(3);
-        expect(new Function("foo", "bar", "return foo + bar")(1, 2)).toBe(3);
-        expect(new Function("foo", "bar,baz", "return foo + bar + baz")(1, 2, 3)).toBe(6);
-        expect(new Function("foo", "bar", "baz", "return foo + bar + baz")(1, 2, 3)).toBe(6);
-        expect(new Function("foo", "if (foo) { return 42; } else { return 'bar'; }")(true)).toBe(42);
-        expect(new Function("foo", "if (foo) { return 42; } else { return 'bar'; }")(false)).toBe("bar");
-        expect(new Function("return typeof Function()")()).toBe("function");
-        expect(new Function("x", "return function (y) { return x + y };")(1)(2)).toBe(3);
+  test("basic functionality", () => {
+    expect(Function()()).toBeUndefined();
+    expect(new Function()()).toBeUndefined();
+    expect(Function("return 42")()).toBe(42);
+    expect(new Function("return 42")()).toBe(42);
+    expect(new Function("foo", "return foo")(42)).toBe(42);
+    expect(new Function("foo,bar", "return foo + bar")(1, 2)).toBe(3);
+    expect(new Function("foo", "bar", "return foo + bar")(1, 2)).toBe(3);
+    expect(new Function("foo", "bar,baz", "return foo + bar + baz")(1, 2, 3)).toBe(6);
+    expect(new Function("foo", "bar", "baz", "return foo + bar + baz")(1, 2, 3)).toBe(6);
+    expect(new Function("foo", "if (foo) { return 42; } else { return 'bar'; }")(true)).toBe(42);
+    expect(new Function("foo", "if (foo) { return 42; } else { return 'bar'; }")(false)).toBe(
+      "bar"
+    );
+    expect(new Function("return typeof Function()")()).toBe("function");
+    expect(new Function("x", "return function (y) { return x + y };")(1)(2)).toBe(3);
 
-        expect(new Function().name).toBe("anonymous");
-        expect(new Function().toString()).toBe("function anonymous() {\n  ???\n}");
-    });
+    expect(new Function().name).toBe("anonymous");
+    expect(new Function().toString()).toBe("function anonymous() {\n  ???\n}");
+  });
 });
 
 describe("errors", () => {
-    test("syntax error", () => {
-        expect(() => {
-            new Function("[");
-        })
-            // This might be confusing at first but keep in mind it's actually parsing
-            // function anonymous() { [ }
-            // This is in line with what other engines are reporting.
-            .toThrowWithMessage(SyntaxError, "Unexpected token CurlyClose. Expected BracketClose (line: 1, column: 26)");
-    });
+  test("syntax error", () => {
+    expect(() => {
+      new Function("[");
+    })
+      // This might be confusing at first but keep in mind it's actually parsing
+      // function anonymous() { [ }
+      // This is in line with what other engines are reporting.
+      .toThrowWithMessage(
+        SyntaxError,
+        "Unexpected token CurlyClose. Expected BracketClose (line: 1, column: 26)"
+      );
+  });
 });

Libraries/LibJS/Tests/builtins/Function/Function.prototype.apply.js

@@ -1,49 +1,51 @@
 test("basic functionality", () => {
-    function Foo(arg) {
-        this.foo = arg;
-    }
-    function Bar(arg) {
-        this.bar = arg;
-    }
-    function FooBar(arg) {
-        Foo.apply(this, [arg]);
-        Bar.apply(this, [arg]);
-    }
-    function FooBarBaz(arg) {
-        Foo.apply(this, [arg]);
-        Bar.apply(this, [arg]);
-        this.baz = arg;
-    }
-
-    expect(Function.prototype.apply).toHaveLength(2);
-
-    var foo = new Foo("test");
-    expect(foo.foo).toBe("test");
-    expect(foo.bar).toBeUndefined();
-    expect(foo.baz).toBeUndefined();
-
-    var bar = new Bar("test");
-    expect(bar.foo).toBeUndefined();
-    expect(bar.bar).toBe("test");
-    expect(bar.baz).toBeUndefined();
-
-    var foobar = new FooBar("test");
-    expect(foobar.foo).toBe("test");
-    expect(foobar.bar).toBe("test");
-    expect(foobar.baz).toBeUndefined();
-
-    var foobarbaz = new FooBarBaz("test");
-    expect(foobarbaz.foo).toBe("test");
-    expect(foobarbaz.bar).toBe("test");
-    expect(foobarbaz.baz).toBe("test");
-
-    expect(Math.abs.apply(null, [-1])).toBe(1);
-
-    var add = (x, y) => x + y;
-    expect(add.apply(null, [1, 2])).toBe(3);
-
-    var multiply = function (x, y) { return x * y; };
-    expect(multiply.apply(null, [3, 4])).toBe(12);
-
-    expect((() => this).apply("foo")).toBe(globalThis);
+  function Foo(arg) {
+    this.foo = arg;
+  }
+  function Bar(arg) {
+    this.bar = arg;
+  }
+  function FooBar(arg) {
+    Foo.apply(this, [arg]);
+    Bar.apply(this, [arg]);
+  }
+  function FooBarBaz(arg) {
+    Foo.apply(this, [arg]);
+    Bar.apply(this, [arg]);
+    this.baz = arg;
+  }
+
+  expect(Function.prototype.apply).toHaveLength(2);
+
+  var foo = new Foo("test");
+  expect(foo.foo).toBe("test");
+  expect(foo.bar).toBeUndefined();
+  expect(foo.baz).toBeUndefined();
+
+  var bar = new Bar("test");
+  expect(bar.foo).toBeUndefined();
+  expect(bar.bar).toBe("test");
+  expect(bar.baz).toBeUndefined();
+
+  var foobar = new FooBar("test");
+  expect(foobar.foo).toBe("test");
+  expect(foobar.bar).toBe("test");
+  expect(foobar.baz).toBeUndefined();
+
+  var foobarbaz = new FooBarBaz("test");
+  expect(foobarbaz.foo).toBe("test");
+  expect(foobarbaz.bar).toBe("test");
+  expect(foobarbaz.baz).toBe("test");
+
+  expect(Math.abs.apply(null, [-1])).toBe(1);
+
+  var add = (x, y) => x + y;
+  expect(add.apply(null, [1, 2])).toBe(3);
+
+  var multiply = function (x, y) {
+    return x * y;
+  };
+  expect(multiply.apply(null, [3, 4])).toBe(12);
+
+  expect((() => this).apply("foo")).toBe(globalThis);
 });

Libraries/LibJS/Tests/builtins/Function/Function.prototype.bind.js

@@ -1,138 +1,149 @@
 describe("basic behavior", () => {
-    test("basic binding", () => {
-        expect(Function.prototype.bind.length).toBe(1);
+  test("basic binding", () => {
+    expect(Function.prototype.bind).toHaveLength(1);
 
-        var charAt = String.prototype.charAt.bind("bar");
-        expect(charAt(0) + charAt(1) + charAt(2)).toBe("bar");
+    var charAt = String.prototype.charAt.bind("bar");
+    expect(charAt(0) + charAt(1) + charAt(2)).toBe("bar");
 
-        function getB() {
-            return this.toUpperCase().charAt(0);
-        }
-        expect(getB.bind("bar")()).toBe("B");
-    });
-
-    test("bound functions work with array functions", () => {
-        var Make3 = Number.bind(null, 3);
-        expect([55].map(Make3)[0]).toBe(3);
-
-        var MakeTrue = Boolean.bind(null, true);
-
-        expect([1, 2, 3].filter(MakeTrue).length).toBe(3);
-        expect([1, 2, 3].reduce((function (acc, x) { return acc + x }).bind(null, 4, 5))).toBe(9);
-        expect([1, 2, 3].reduce((function (acc, x) { return acc + x + this; }).bind(3))).toBe(12);
-    });
+    function getB() {
+      return this.toUpperCase().charAt(0);
+    }
+    expect(getB.bind("bar")()).toBe("B");
+  });
+
+  test("bound functions work with array functions", () => {
+    var Make3 = Number.bind(null, 3);
+    expect([55].map(Make3)[0]).toBe(3);
+
+    var MakeTrue = Boolean.bind(null, true);
+
+    expect([1, 2, 3].filter(MakeTrue)).toHaveLength(3);
+    expect(
+      [1, 2, 3].reduce(
+        function (acc, x) {
+          return acc + x;
+        }.bind(null, 4, 5)
+      )
+    ).toBe(9);
+    expect(
+      [1, 2, 3].reduce(
+        function (acc, x) {
+          return acc + x + this;
+        }.bind(3)
+      )
+    ).toBe(12);
+  });
 });
 
 describe("bound function arguments", () => {
-    function sum(a, b, c) {
-        return a + b + c;
-    }
-    var boundSum = sum.bind(null, 10, 5);
-
-    test("arguments are bound to the function", () => {
-        expect(boundSum()).toBeNaN();
-        expect(boundSum(5)).toBe(20);
-        expect(boundSum(5, 6, 7)).toBe(20);
-    });
-
-    test("arguments are appended to a BoundFunction's bound arguments", () => {
-        expect(boundSum.bind(null, 5)()).toBe(20);
-    });
-
-    test("binding a constructor's arguments", () => {
-        var Make5 = Number.bind(null, 5);
-        expect(Make5()).toBe(5);
-        expect(new Make5().valueOf()).toBe(5);
-    });
-
-    test("length property", () => {
-        expect(sum).toHaveLength(3);
-        expect(boundSum).toHaveLength(1);
-        expect(boundSum.bind(null, 5)).toHaveLength(0);
-        expect(boundSum.bind(null, 5, 6, 7, 8)).toHaveLength(0);
-    });
-})
+  function sum(a, b, c) {
+    return a + b + c;
+  }
+  var boundSum = sum.bind(null, 10, 5);
+
+  test("arguments are bound to the function", () => {
+    expect(boundSum()).toBeNaN();
+    expect(boundSum(5)).toBe(20);
+    expect(boundSum(5, 6, 7)).toBe(20);
+  });
+
+  test("arguments are appended to a BoundFunction's bound arguments", () => {
+    expect(boundSum.bind(null, 5)()).toBe(20);
+  });
+
+  test("binding a constructor's arguments", () => {
+    var Make5 = Number.bind(null, 5);
+    expect(Make5()).toBe(5);
+    expect(new Make5().valueOf()).toBe(5);
+  });
+
+  test("length property", () => {
+    expect(sum).toHaveLength(3);
+    expect(boundSum).toHaveLength(1);
+    expect(boundSum.bind(null, 5)).toHaveLength(0);
+    expect(boundSum.bind(null, 5, 6, 7, 8)).toHaveLength(0);
+  });
+});
 
 describe("bound function |this|", () => {
-    function identity() {
-        return this;
+  function identity() {
+    return this;
+  }
+
+  test("captures global object as |this| if |this| is null or undefined", () => {
+    expect(identity.bind()()).toBe(globalThis);
+    expect(identity.bind(null)()).toBe(globalThis);
+    expect(identity.bind(undefined)()).toBe(globalThis);
+
+    function Foo() {
+      expect(identity.bind()()).toBe(globalThis);
+      expect(identity.bind(this)()).toBe(this);
     }
+    new Foo();
+  });
 
-    test("captures global object as |this| if |this| is null or undefined", () => {
-        expect(identity.bind()()).toBe(globalThis);
-        expect(identity.bind(null)()).toBe(globalThis);
-        expect(identity.bind(undefined)()).toBe(globalThis);
-
-        function Foo() {
-            expect(identity.bind()()).toBe(globalThis);
-            expect(identity.bind(this)()).toBe(this);
-        }
-        new Foo();
-    });
-
-    test("does not capture global object as |this| if |this| is null or undefined in strict mode", () => {
-        "use strict";
-
-        function strictIdentity() {
-            return this;
-        }
-
-        expect(strictIdentity.bind()()).toBeUndefined();
-        expect(strictIdentity.bind(null)()).toBeNull();
-        expect(strictIdentity.bind(undefined)()).toBeUndefined();
-    });
-
-    test("primitive |this| values are converted to objects", () => {
-        expect(identity.bind("foo")()).toBeInstanceOf(String);
-        expect(identity.bind(123)()).toBeInstanceOf(Number);
-        expect(identity.bind(true)()).toBeInstanceOf(Boolean);
-    });
-
-    test("bound functions retain |this| values passed to them", () => {
-        var obj = { foo: "bar" };
-        expect(identity.bind(obj)()).toBe(obj);
-    });
-
-    test("bound |this| cannot be changed after being set", () => {
-        expect(identity.bind("foo").bind(123)()).toBeInstanceOf(String);
-    });
-
-    test("arrow functions cannot be bound", () => {
-        expect((() => this).bind("foo")()).toBe(globalThis)
-    });
-})
+  test("does not capture global object as |this| if |this| is null or undefined in strict mode", () => {
+    "use strict";
 
-describe("bound function constructors", () => {
-    function Bar() {
-        this.x = 3;
-        this.y = 4;
+    function strictIdentity() {
+      return this;
     }
 
-    Bar.prototype.baz = "baz";
-    var BoundBar = Bar.bind({ u: 5, v: 6 });
-    var bar = new BoundBar();
-
-
-    test("bound |this| value does not affect constructor", () => {
-        expect(bar.x).toBe(3);
-        expect(bar.y).toBe(4);
-        expect(typeof bar.u).toBe("undefined");
-        expect(typeof bar.v).toBe("undefined");
-    });
-
-    test("bound functions retain original prototype", () => {
-        expect(bar.baz).toBe("baz");
-    });
+    expect(strictIdentity.bind()()).toBeUndefined();
+    expect(strictIdentity.bind(null)()).toBeNull();
+    expect(strictIdentity.bind(undefined)()).toBeUndefined();
+  });
+
+  test("primitive |this| values are converted to objects", () => {
+    expect(identity.bind("foo")()).toBeInstanceOf(String);
+    expect(identity.bind(123)()).toBeInstanceOf(Number);
+    expect(identity.bind(true)()).toBeInstanceOf(Boolean);
+  });
+
+  test("bound functions retain |this| values passed to them", () => {
+    var obj = { foo: "bar" };
+    expect(identity.bind(obj)()).toBe(obj);
+  });
+
+  test("bound |this| cannot be changed after being set", () => {
+    expect(identity.bind("foo").bind(123)()).toBeInstanceOf(String);
+  });
+
+  test("arrow functions cannot be bound", () => {
+    expect((() => this).bind("foo")()).toBe(globalThis);
+  });
+});
 
-    test("bound functions do not have a prototype property", () => {
-        expect(BoundBar).not.toHaveProperty("prototype");
-    });
+describe("bound function constructors", () => {
+  function Bar() {
+    this.x = 3;
+    this.y = 4;
+  }
+
+  Bar.prototype.baz = "baz";
+  var BoundBar = Bar.bind({ u: 5, v: 6 });
+  var bar = new BoundBar();
+
+  test("bound |this| value does not affect constructor", () => {
+    expect(bar.x).toBe(3);
+    expect(bar.y).toBe(4);
+    expect(typeof bar.u).toBe("undefined");
+    expect(typeof bar.v).toBe("undefined");
+  });
+
+  test("bound functions retain original prototype", () => {
+    expect(bar.baz).toBe("baz");
+  });
+
+  test("bound functions do not have a prototype property", () => {
+    expect(BoundBar).not.toHaveProperty("prototype");
+  });
 });
 
 describe("errors", () => {
-    test("does not accept non-function values", () => {
-        expect(() => {
-            Function.prototype.bind.call("foo");
-        }).toThrowWithMessage(TypeError, "Not a Function object");
-    });
+  test("does not accept non-function values", () => {
+    expect(() => {
+      Function.prototype.bind.call("foo");
+    }).toThrowWithMessage(TypeError, "Not a Function object");
+  });
 });

Libraries/LibJS/Tests/builtins/Function/Function.prototype.call.js

@@ -1,51 +1,53 @@
 test("length", () => {
-    expect(Function.prototype.call).toHaveLength(1);
+  expect(Function.prototype.call).toHaveLength(1);
 });
 
 test("basic functionality", () => {
-    function Foo(arg) {
-        this.foo = arg;
-    }
-    function Bar(arg) {
-        this.bar = arg;
-    }
-    function FooBar(arg) {
-        Foo.call(this, arg);
-        Bar.call(this, arg);
-    }
-    function FooBarBaz(arg) {
-        Foo.call(this, arg);
-        Bar.call(this, arg);
-        this.baz = arg;
-    }
-
-    var foo = new Foo("test");
-    expect(foo.foo).toBe("test");
-    expect(foo.bar).toBeUndefined();
-    expect(foo.baz).toBeUndefined();
-
-    var bar = new Bar("test");
-    expect(bar.foo).toBeUndefined();
-    expect(bar.bar).toBe("test");
-    expect(bar.baz).toBeUndefined();
-
-    var foobar = new FooBar("test");
-    expect(foobar.foo).toBe("test");
-    expect(foobar.bar).toBe("test");
-    expect(foobar.baz).toBeUndefined();
-
-    var foobarbaz = new FooBarBaz("test");
-    expect(foobarbaz.foo).toBe("test");
-    expect(foobarbaz.bar).toBe("test");
-    expect(foobarbaz.baz).toBe("test");
-
-    expect(Math.abs.call(null, -1)).toBe(1);
-
-    var add = (x, y) => x + y;
-    expect(add.call(null, 1, 2)).toBe(3);
-
-    var multiply = function (x, y) { return x * y; };
-    expect(multiply.call(null, 3, 4)).toBe(12);
-
-    expect((() => this).call("foo")).toBe(globalThis);
+  function Foo(arg) {
+    this.foo = arg;
+  }
+  function Bar(arg) {
+    this.bar = arg;
+  }
+  function FooBar(arg) {
+    Foo.call(this, arg);
+    Bar.call(this, arg);
+  }
+  function FooBarBaz(arg) {
+    Foo.call(this, arg);
+    Bar.call(this, arg);
+    this.baz = arg;
+  }
+
+  var foo = new Foo("test");
+  expect(foo.foo).toBe("test");
+  expect(foo.bar).toBeUndefined();
+  expect(foo.baz).toBeUndefined();
+
+  var bar = new Bar("test");
+  expect(bar.foo).toBeUndefined();
+  expect(bar.bar).toBe("test");
+  expect(bar.baz).toBeUndefined();
+
+  var foobar = new FooBar("test");
+  expect(foobar.foo).toBe("test");
+  expect(foobar.bar).toBe("test");
+  expect(foobar.baz).toBeUndefined();
+
+  var foobarbaz = new FooBarBaz("test");
+  expect(foobarbaz.foo).toBe("test");
+  expect(foobarbaz.bar).toBe("test");
+  expect(foobarbaz.baz).toBe("test");
+
+  expect(Math.abs.call(null, -1)).toBe(1);
+
+  var add = (x, y) => x + y;
+  expect(add.call(null, 1, 2)).toBe(3);
+
+  var multiply = function (x, y) {
+    return x * y;
+  };
+  expect(multiply.call(null, 3, 4)).toBe(12);
+
+  expect((() => this).call("foo")).toBe(globalThis);
 });

Libraries/LibJS/Tests/builtins/Function/Function.prototype.toString.js

@@ -1,15 +1,17 @@
 test("basic functionality", () => {
-    expect((function() {}).toString()).toBe("function () {\n  ???\n}");
-    expect((function(foo) {}).toString()).toBe("function (foo) {\n  ???\n}");
-    expect((function(foo, bar, baz) {}).toString()).toBe("function (foo, bar, baz) {\n  ???\n}");
-    expect((function(foo, bar, baz) {
-        if (foo) {
-            return baz;
-        } else if (bar) {
-            return foo;
-        }
-        return bar + 42;
-    }).toString()).toBe("function (foo, bar, baz) {\n  ???\n}");
-    expect(console.debug.toString()).toBe("function debug() {\n  [NativeFunction]\n}");
-    expect(Function.toString()).toBe("function Function() {\n  [FunctionConstructor]\n}");
+  expect(function () {}.toString()).toBe("function () {\n  ???\n}");
+  expect(function (foo) {}.toString()).toBe("function (foo) {\n  ???\n}");
+  expect(function (foo, bar, baz) {}.toString()).toBe("function (foo, bar, baz) {\n  ???\n}");
+  expect(
+    function (foo, bar, baz) {
+      if (foo) {
+        return baz;
+      } else if (bar) {
+        return foo;
+      }
+      return bar + 42;
+    }.toString()
+  ).toBe("function (foo, bar, baz) {\n  ???\n}");
+  expect(console.debug.toString()).toBe("function debug() {\n  [NativeFunction]\n}");
+  expect(Function.toString()).toBe("function Function() {\n  [FunctionConstructor]\n}");
 });

Libraries/LibJS/Tests/builtins/Infinity/Infinity.js

@@ -1,22 +1,22 @@
 test("basic functionality", () => {
-    expect(Infinity + "").toBe("Infinity");
-    expect(-Infinity + "").toBe("-Infinity");
-    expect(Infinity).toBe(Infinity);
-    expect(Infinity - 1).toBe(Infinity);
-    expect(Infinity + 1).toBe(Infinity);
-    expect(-Infinity).toBe(-Infinity);
-    expect(-Infinity - 1).toBe(-Infinity);
-    expect(-Infinity + 1).toBe(-Infinity);
-    expect(1 / Infinity).toBe(0);
-    expect(1 / -Infinity).toBe(-0);
-    expect(1 / 0).toBe(Infinity);
-    expect(-1 / 0).toBe(-Infinity);
-    expect(-100).toBeLessThan(Infinity);
-    expect(0).toBeLessThan(Infinity);
-    expect(100).toBeLessThan(Infinity);
-    expect(-Infinity).toBeLessThan(Infinity);
-    expect(-100).toBeGreaterThan(-Infinity);
-    expect(0).toBeGreaterThan(-Infinity);
-    expect(100).toBeGreaterThan(-Infinity);
-    expect(Infinity).toBeGreaterThan(-Infinity);
+  expect(Infinity + "").toBe("Infinity");
+  expect(-Infinity + "").toBe("-Infinity");
+  expect(Infinity).toBe(Infinity);
+  expect(Infinity - 1).toBe(Infinity);
+  expect(Infinity + 1).toBe(Infinity);
+  expect(-Infinity).toBe(-Infinity);
+  expect(-Infinity - 1).toBe(-Infinity);
+  expect(-Infinity + 1).toBe(-Infinity);
+  expect(1 / Infinity).toBe(0);
+  expect(1 / -Infinity).toBe(-0);
+  expect(1 / 0).toBe(Infinity);
+  expect(-1 / 0).toBe(-Infinity);
+  expect(-100).toBeLessThan(Infinity);
+  expect(0).toBeLessThan(Infinity);
+  expect(100).toBeLessThan(Infinity);
+  expect(-Infinity).toBeLessThan(Infinity);
+  expect(-100).toBeGreaterThan(-Infinity);
+  expect(0).toBeGreaterThan(-Infinity);
+  expect(100).toBeGreaterThan(-Infinity);
+  expect(Infinity).toBeGreaterThan(-Infinity);
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.parse-reviver.js

@@ -1,9 +1,9 @@
 test("basic functionality", () => {
-    let string = `{"var1":10,"var2":"hello","var3":{"nested":5}}`;
+  let string = `{"var1":10,"var2":"hello","var3":{"nested":5}}`;
 
-    let object = JSON.parse(string, (key, value) => typeof value === "number" ? value * 2 : value);
-    expect(object).toEqual({ var1: 20, var2: "hello", var3: { nested: 10 } });
+  let object = JSON.parse(string, (key, value) => (typeof value === "number" ? value * 2 : value));
+  expect(object).toEqual({ var1: 20, var2: "hello", var3: { nested: 10 } });
 
-    object = JSON.parse(string, (key, value) => typeof value === "number" ? undefined : value);
-    expect(object).toEqual({ var2: "hello", var3: {} });
+  object = JSON.parse(string, (key, value) => (typeof value === "number" ? undefined : value));
+  expect(object).toEqual({ var2: "hello", var3: {} });
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.parse.js

@@ -1,37 +1,37 @@
 test("basic functionality", () => {
-    expect(JSON.parse).toHaveLength(2);
+  expect(JSON.parse).toHaveLength(2);
 
-    const properties = [
-        ["5", 5],
-        ["null", null],
-        ["true", true],
-        ["false", false],
-        ['"test"', "test"],
-        ['[1,2,"foo"]', [1, 2, "foo"]],
-        ['{"foo":1,"bar":"baz"}', { foo: 1, bar: "baz" }],
-    ];
+  const properties = [
+    ["5", 5],
+    ["null", null],
+    ["true", true],
+    ["false", false],
+    ['"test"', "test"],
+    ['[1,2,"foo"]', [1, 2, "foo"]],
+    ['{"foo":1,"bar":"baz"}', { foo: 1, bar: "baz" }],
+  ];
 
-    properties.forEach(testCase => {
-        expect(JSON.parse(testCase[0])).toEqual(testCase[1]);
-    });
+  properties.forEach(testCase => {
+    expect(JSON.parse(testCase[0])).toEqual(testCase[1]);
+  });
 });
 
 test("syntax errors", () => {
-    [
-        undefined,
-        NaN,
-        -NaN,
-        Infinity,
-        -Infinity,
-        '{ "foo" }',
-        '{ foo: "bar" }',
-        "[1,2,3,]",
-        "[1,2,3, ]",
-        '{ "foo": "bar",}',
-        '{ "foo": "bar", }',
-    ].forEach(test => {
-        expect(() => {
-            JSON.parse(test);
-        }).toThrow(SyntaxError);
-    });
+  [
+    undefined,
+    NaN,
+    -NaN,
+    Infinity,
+    -Infinity,
+    '{ "foo" }',
+    '{ foo: "bar" }',
+    "[1,2,3,]",
+    "[1,2,3, ]",
+    '{ "foo": "bar",}',
+    '{ "foo": "bar", }',
+  ].forEach(test => {
+    expect(() => {
+      JSON.parse(test);
+    }).toThrow(SyntaxError);
+  });
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.stringify-order.js

@@ -1,28 +1,30 @@
 test("basic functionality", () => {
-    let o = {
-        key1: "key1",
-        key2: "key2",
-        key3: "key3",
-    };
+  let o = {
+    key1: "key1",
+    key2: "key2",
+    key3: "key3",
+  };
 
-    Object.defineProperty(o, "defined", {
-        enumerable: true,
-        get() {
-            o.prop = "prop";
-            return "defined";
-        },
-    });
+  Object.defineProperty(o, "defined", {
+    enumerable: true,
+    get() {
+      o.prop = "prop";
+      return "defined";
+    },
+  });
 
-    o.key4 = "key4";
+  o.key4 = "key4";
 
-    o[2] = 2;
-    o[0] = 0;
-    o[1] = 1;
+  o[2] = 2;
+  o[0] = 0;
+  o[1] = 1;
 
-    delete o.key1;
-    delete o.key3;
+  delete o.key1;
+  delete o.key3;
 
-    o.key1 = "key1";
+  o.key1 = "key1";
 
-    expect(JSON.stringify(o)).toBe('{"0":0,"1":1,"2":2,"key2":"key2","defined":"defined","key4":"key4","key1":"key1"}');
+  expect(JSON.stringify(o)).toBe(
+    '{"0":0,"1":1,"2":2,"key2":"key2","defined":"defined","key4":"key4","key1":"key1"}'
+  );
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.stringify-proxy.js

@@ -1,12 +1,11 @@
 test("basic functionality", () => {
-    let p = new Proxy([], {
-        get(_, key) {
-            if (key === "length")
-                return 3;
-            return Number(key);
-        },
-    });
+  let p = new Proxy([], {
+    get(_, key) {
+      if (key === "length") return 3;
+      return Number(key);
+    },
+  });
 
-    expect(JSON.stringify(p)).toBe("[0,1,2]");
-    expect(JSON.stringify([[new Proxy(p, {})]])).toBe("[[[0,1,2]]]");
+  expect(JSON.stringify(p)).toBe("[0,1,2]");
+  expect(JSON.stringify([[new Proxy(p, {})]])).toBe("[[[0,1,2]]]");
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.stringify-replacer.js

@@ -1,33 +1,38 @@
 test("basic functionality", () => {
-    let o = {
-        var1: "foo",
-        var2: 42,
-        arr: [1, 2, {
-            nested: {
-                hello: "world",
-            },
-            get x() { return 10; }
-        }],
-        obj: {
-            subarr: [3],
+  let o = {
+    var1: "foo",
+    var2: 42,
+    arr: [
+      1,
+      2,
+      {
+        nested: {
+          hello: "world",
         },
-    };
+        get x() {
+          return 10;
+        },
+      },
+    ],
+    obj: {
+      subarr: [3],
+    },
+  };
 
-    let string = JSON.stringify(o, (key, value) => {
-        if (key === "hello")
-            return undefined;
-        if (value === 10)
-            return 20;
-        if (key === "subarr")
-            return [3, 4, 5];
-        return value;
-    });
+  let string = JSON.stringify(o, (key, value) => {
+    if (key === "hello") return undefined;
+    if (value === 10) return 20;
+    if (key === "subarr") return [3, 4, 5];
+    return value;
+  });
 
-    expect(string).toBe('{"var1":"foo","var2":42,"arr":[1,2,{"nested":{},"x":20}],"obj":{"subarr":[3,4,5]}}');
+  expect(string).toBe(
+    '{"var1":"foo","var2":42,"arr":[1,2,{"nested":{},"x":20}],"obj":{"subarr":[3,4,5]}}'
+  );
 
-    string = JSON.stringify(o, ["var1", "var1", "var2", "obj"]);
-    expect(string).toBe('{"var1":"foo","var2":42,"obj":{}}');
+  string = JSON.stringify(o, ["var1", "var1", "var2", "obj"]);
+  expect(string).toBe('{"var1":"foo","var2":42,"obj":{}}');
 
-    string = JSON.stringify(o, ["var1", "var1", "var2", "obj", "subarr"]);
-    expect(string).toBe('{"var1":"foo","var2":42,"obj":{"subarr":[3]}}');
+  string = JSON.stringify(o, ["var1", "var1", "var2", "obj", "subarr"]);
+  expect(string).toBe('{"var1":"foo","var2":42,"obj":{"subarr":[3]}}');
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.stringify-space.js

@@ -1,17 +1,20 @@
 test("basic functionality", () => {
-    let o = {
-        foo: 1,
-        bar: "baz",
-        qux: {
-            get x() { return 10; },
-            y() { return 20; },
-            arr: [1, 2, 3],
-        }
-    };
+  let o = {
+    foo: 1,
+    bar: "baz",
+    qux: {
+      get x() {
+        return 10;
+      },
+      y() {
+        return 20;
+      },
+      arr: [1, 2, 3],
+    },
+  };
 
-    let string = JSON.stringify(o, null, 4);
-    let expected =
-`{
+  let string = JSON.stringify(o, null, 4);
+  let expected = `{
     "foo": 1,
     "bar": "baz",
     "qux": {
@@ -24,11 +27,10 @@ test("basic functionality", () => {
     }
 }`;
 
-    expect(string).toBe(expected);
+  expect(string).toBe(expected);
 
-    string = JSON.stringify(o, null, "abcd");
-    expected =
-`{
+  string = JSON.stringify(o, null, "abcd");
+  expected = `{
 abcd"foo": 1,
 abcd"bar": "baz",
 abcd"qux": {
@@ -41,5 +43,5 @@ abcdabcd]
 abcd}
 }`;
 
-    expect(string).toBe(expected);
+  expect(string).toBe(expected);
 });

Libraries/LibJS/Tests/builtins/JSON/JSON.stringify.js

@@ -1,71 +1,71 @@
 describe("correct behavior", () => {
-    test("length", () => {
-        expect(JSON.stringify).toHaveLength(3);
-    });
+  test("length", () => {
+    expect(JSON.stringify).toHaveLength(3);
+  });
 
-    test("basic functionality", () => {
-        [
-            [5, "5"],
-            [undefined, undefined],
-            [null, "null"],
-            [NaN, "null"],
-            [-NaN, "null"],
-            [Infinity, "null"],
-            [-Infinity, "null"],
-            [true, "true"],
-            [false, "false"],
-            ["test", '"test"'],
-            [new Number(5), "5"],
-            [new Boolean(false), "false"],
-            [new String("test"), '"test"'],
-            [() => {}, undefined],
-            [[1, 2, "foo"], '[1,2,"foo"]'],
-            [{ foo: 1, bar: "baz", qux() {} }, '{"foo":1,"bar":"baz"}'],
-            [
-                {
-                    var1: 1,
-                    var2: 2,
-                    toJSON(key) {
-                        let o = this;
-                        o.var2 = 10;
-                        return o;
-                    }
-                },
-                '{"var1":1,"var2":10}',
-            ],
-        ].forEach(testCase => {
-            expect(JSON.stringify(testCase[0])).toEqual(testCase[1]);
-        });
+  test("basic functionality", () => {
+    [
+      [5, "5"],
+      [undefined, undefined],
+      [null, "null"],
+      [NaN, "null"],
+      [-NaN, "null"],
+      [Infinity, "null"],
+      [-Infinity, "null"],
+      [true, "true"],
+      [false, "false"],
+      ["test", '"test"'],
+      [new Number(5), "5"],
+      [new Boolean(false), "false"],
+      [new String("test"), '"test"'],
+      [() => {}, undefined],
+      [[1, 2, "foo"], '[1,2,"foo"]'],
+      [{ foo: 1, bar: "baz", qux() {} }, '{"foo":1,"bar":"baz"}'],
+      [
+        {
+          var1: 1,
+          var2: 2,
+          toJSON(key) {
+            let o = this;
+            o.var2 = 10;
+            return o;
+          },
+        },
+        '{"var1":1,"var2":10}',
+      ],
+    ].forEach(testCase => {
+      expect(JSON.stringify(testCase[0])).toEqual(testCase[1]);
     });
+  });
 
-    test("ignores non-enumerable properties", () => {
-        let o = { foo: "bar" };
-        Object.defineProperty(o, "baz", { value: "qux", enumerable: false });
-        expect(JSON.stringify(o)).toBe('{"foo":"bar"}');
-    });
+  test("ignores non-enumerable properties", () => {
+    let o = { foo: "bar" };
+    Object.defineProperty(o, "baz", { value: "qux", enumerable: false });
+    expect(JSON.stringify(o)).toBe('{"foo":"bar"}');
+  });
 });
 
 describe("errors", () => {
-    test("cannot serialize BigInt", () => {
-        expect(() => {
-            JSON.stringify(5n);
-        }).toThrow(TypeError, "Cannot serialize BigInt value to JSON");
-    });
+  test("cannot serialize BigInt", () => {
+    expect(() => {
+      JSON.stringify(5n);
+    }).toThrow(TypeError, "Cannot serialize BigInt value to JSON");
+  });
 
-    test("cannot serialize circular structures", () => {
-        let bad1 = {};
-        bad1.foo = bad1;
-        let bad2 = [];
-        bad2[5] = [[[bad2]]];
+  test("cannot serialize circular structures", () => {
+    let bad1 = {};
+    bad1.foo = bad1;
+    let bad2 = [];
+    bad2[5] = [[[bad2]]];
 
-        let bad3a = { foo: "bar" };
-        let bad3b = [1, 2, bad3a];
-        bad3a.bad = bad3b;
+    let bad3a = { foo: "bar" };
+    let bad3b = [1, 2, bad3a];
+    bad3a.bad = bad3b;
 
-        [bad1, bad2, bad3a].forEach(bad => {
-            expect(() => {
-                JSON.stringify(bad);
-            }).toThrow(TypeError, "Cannot stringify circular object");
-        });
+    [bad1, bad2, bad3a].forEach(bad => {
+      expect(() => {
+        JSON.stringify(bad);
+      }).toThrow(TypeError, "Cannot stringify circular object");
     });
+  });
 });

Libraries/LibJS/Tests/builtins/Math/Math-constants.js

@@ -1,10 +1,10 @@
 test("basic functionality", () => {
-    expect(Math.E).toBeCloseTo(2.718281);
-    expect(Math.LN2).toBeCloseTo(0.693147);
-    expect(Math.LN10).toBeCloseTo(2.302585);
-    expect(Math.LOG2E).toBeCloseTo(1.442695);
-    expect(Math.LOG10E).toBeCloseTo(0.434294);
-    expect(Math.PI).toBeCloseTo(3.1415926);
-    expect(Math.SQRT1_2).toBeCloseTo(0.707106);
-    expect(Math.SQRT2).toBeCloseTo(1.414213);
+  expect(Math.E).toBeCloseTo(2.718281);
+  expect(Math.LN2).toBeCloseTo(0.693147);
+  expect(Math.LN10).toBeCloseTo(2.302585);
+  expect(Math.LOG2E).toBeCloseTo(1.442695);
+  expect(Math.LOG10E).toBeCloseTo(0.434294);
+  expect(Math.PI).toBeCloseTo(3.1415926);
+  expect(Math.SQRT1_2).toBeCloseTo(0.707106);
+  expect(Math.SQRT2).toBeCloseTo(1.414213);
 });

Libraries/LibJS/Tests/builtins/Math/Math.abs.js

@@ -1,14 +1,14 @@
 test("basic functionality", () => {
-    expect(Math.abs).toHaveLength(1);
+  expect(Math.abs).toHaveLength(1);
 
-    expect(Math.abs('-1')).toBe(1);
-    expect(Math.abs(-2)).toBe(2);
-    expect(Math.abs(null)).toBe(0);
-    expect(Math.abs('')).toBe(0);
-    expect(Math.abs([])).toBe(0);
-    expect(Math.abs([2])).toBe(2);
-    expect(Math.abs([1, 2])).toBeNaN();
-    expect(Math.abs({})).toBeNaN();
-    expect(Math.abs('string')).toBeNaN();
-    expect(Math.abs()).toBeNaN();
+  expect(Math.abs("-1")).toBe(1);
+  expect(Math.abs(-2)).toBe(2);
+  expect(Math.abs(null)).toBe(0);
+  expect(Math.abs("")).toBe(0);
+  expect(Math.abs([])).toBe(0);
+  expect(Math.abs([2])).toBe(2);
+  expect(Math.abs([1, 2])).toBeNaN();
+  expect(Math.abs({})).toBeNaN();
+  expect(Math.abs("string")).toBeNaN();
+  expect(Math.abs()).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.acosh.js

@@ -1,9 +1,9 @@
 test("basic functionality", () => {
-    expect(Math.acosh).toHaveLength(1);
+  expect(Math.acosh).toHaveLength(1);
 
-    expect(Math.acosh(-1)).toBeNaN();
-    expect(Math.acosh(0)).toBeNaN();
-    expect(Math.acosh(0.5)).toBeNaN();
-    expect(Math.acosh(1)).toBeCloseTo(0);
-    // FIXME: expect(Math.acosh(2)).toBeCloseTo(1.316957);
+  expect(Math.acosh(-1)).toBeNaN();
+  expect(Math.acosh(0)).toBeNaN();
+  expect(Math.acosh(0.5)).toBeNaN();
+  expect(Math.acosh(1)).toBeCloseTo(0);
+  // FIXME: expect(Math.acosh(2)).toBeCloseTo(1.316957);
 });

Libraries/LibJS/Tests/builtins/Math/Math.asinh.js

@@ -1,6 +1,6 @@
 test("basic functionality", () => {
-    expect(Math.asinh).toHaveLength(1);
+  expect(Math.asinh).toHaveLength(1);
 
-    expect(Math.asinh(0)).toBeCloseTo(0);
-    // FIXME: expect(Math.asinh(1)).toBeCloseTo(0.881373);
+  expect(Math.asinh(0)).toBeCloseTo(0);
+  // FIXME: expect(Math.asinh(1)).toBeCloseTo(0.881373);
 });

Libraries/LibJS/Tests/builtins/Math/Math.atanh.js

@@ -1,10 +1,10 @@
 test("basic functionality", () => {
-    expect(Math.atanh).toHaveLength(1);
+  expect(Math.atanh).toHaveLength(1);
 
-    expect(Math.atanh(-2)).toBeNaN();
-    expect(Math.atanh(2)).toBeNaN();
-    expect(Math.atanh(-1)).toBe(-Infinity);
-    // FIXME: expect(Math.atanh(0)).toBe(0);
-    expect(Math.atanh(0.5)).toBeCloseTo(0.549306);
-    // FIXME: expect(Math.atanh(1)).toBe(Infinity);
+  expect(Math.atanh(-2)).toBeNaN();
+  expect(Math.atanh(2)).toBeNaN();
+  expect(Math.atanh(-1)).toBe(-Infinity);
+  // FIXME: expect(Math.atanh(0)).toBe(0);
+  expect(Math.atanh(0.5)).toBeCloseTo(0.549306);
+  // FIXME: expect(Math.atanh(1)).toBe(Infinity);
 });

Libraries/LibJS/Tests/builtins/Math/Math.cbrt.js

@@ -1,12 +1,12 @@
 test("basic functionality", () => {
-    expect(Math.cbrt).toHaveLength(1);
+  expect(Math.cbrt).toHaveLength(1);
 
-    expect(Math.cbrt(NaN)).toBeNaN();
-    // FIXME: expect(Math.cbrt(-1)).toBe(-1);
-    expect(Math.cbrt(-0)).toBe(-0);
-    // FIXME: expect(Math.cbrt(-Infinity)).toBe(-Infinity);
-    // FIXME: expect(Math.cbrt(1)).toBe(1);
-    // FIXME: expect(Math.cbrt(Infinity)).toBe(Infinity);
-    expect(Math.cbrt(null)).toBe(0);
-    // FIXME: expect(Math.cbrt(2)).toBeCloseTo(1.259921));
+  expect(Math.cbrt(NaN)).toBeNaN();
+  // FIXME: expect(Math.cbrt(-1)).toBe(-1);
+  expect(Math.cbrt(-0)).toBe(-0);
+  // FIXME: expect(Math.cbrt(-Infinity)).toBe(-Infinity);
+  // FIXME: expect(Math.cbrt(1)).toBe(1);
+  // FIXME: expect(Math.cbrt(Infinity)).toBe(Infinity);
+  expect(Math.cbrt(null)).toBe(0);
+  // FIXME: expect(Math.cbrt(2)).toBeCloseTo(1.259921));
 });

Libraries/LibJS/Tests/builtins/Math/Math.ceil.js

@@ -1,13 +1,13 @@
 test("basic functionality", () => {
-    expect(Math.ceil).toHaveLength(1);
+  expect(Math.ceil).toHaveLength(1);
 
-    expect(Math.ceil(0.95)).toBe(1);
-    expect(Math.ceil(4)).toBe(4);
-    expect(Math.ceil(7.004)).toBe(8);
-    expect(Math.ceil(-0.95)).toBe(-0);
-    expect(Math.ceil(-4)   ).toBe(-4);
-    expect(Math.ceil(-7.004)).toBe(-7);
+  expect(Math.ceil(0.95)).toBe(1);
+  expect(Math.ceil(4)).toBe(4);
+  expect(Math.ceil(7.004)).toBe(8);
+  expect(Math.ceil(-0.95)).toBe(-0);
+  expect(Math.ceil(-4)).toBe(-4);
+  expect(Math.ceil(-7.004)).toBe(-7);
 
-    expect(Math.ceil()).toBeNaN();
-    expect(Math.ceil(NaN)).toBeNaN();
+  expect(Math.ceil()).toBeNaN();
+  expect(Math.ceil(NaN)).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.clz32.js

@@ -1,44 +1,44 @@
 test("basic functionality", () => {
-    expect(Math.clz32).toHaveLength(1);
+  expect(Math.clz32).toHaveLength(1);
 
-    expect(Math.clz32(0)).toBe(32);
-    expect(Math.clz32(1)).toBe(31);
-    expect(Math.clz32(2)).toBe(30);
-    expect(Math.clz32(3)).toBe(30);
-    expect(Math.clz32(4)).toBe(29);
-    expect(Math.clz32(5)).toBe(29);
-    expect(Math.clz32(-1)).toBe(0);
-    expect(Math.clz32(-10)).toBe(0);
-    expect(Math.clz32(-100)).toBe(0);
-    expect(Math.clz32(-1000)).toBe(0);
-    expect(Math.clz32(-0.123)).toBe(32);
-    expect(Math.clz32(0.123)).toBe(32);
-    expect(Math.clz32(1.23)).toBe(31);
-    expect(Math.clz32(12)).toBe(28);
-    expect(Math.clz32(123)).toBe(25);
-    expect(Math.clz32(1234)).toBe(21);
-    expect(Math.clz32(12345)).toBe(18);
-    expect(Math.clz32(123456)).toBe(15);
-    expect(Math.clz32(1234567)).toBe(11);
-    expect(Math.clz32(12345678)).toBe(8);
-    expect(Math.clz32(123456789)).toBe(5);
-    expect(Math.clz32(999999999)).toBe(2);
-    expect(Math.clz32(9999999999)).toBe(1);
-    expect(Math.clz32(99999999999)).toBe(1);
-    expect(Math.clz32(999999999999)).toBe(0);
-    expect(Math.clz32(9999999999999)).toBe(1);
-    expect(Math.clz32(99999999999999)).toBe(3);
-    expect(Math.clz32(999999999999999)).toBe(0);
+  expect(Math.clz32(0)).toBe(32);
+  expect(Math.clz32(1)).toBe(31);
+  expect(Math.clz32(2)).toBe(30);
+  expect(Math.clz32(3)).toBe(30);
+  expect(Math.clz32(4)).toBe(29);
+  expect(Math.clz32(5)).toBe(29);
+  expect(Math.clz32(-1)).toBe(0);
+  expect(Math.clz32(-10)).toBe(0);
+  expect(Math.clz32(-100)).toBe(0);
+  expect(Math.clz32(-1000)).toBe(0);
+  expect(Math.clz32(-0.123)).toBe(32);
+  expect(Math.clz32(0.123)).toBe(32);
+  expect(Math.clz32(1.23)).toBe(31);
+  expect(Math.clz32(12)).toBe(28);
+  expect(Math.clz32(123)).toBe(25);
+  expect(Math.clz32(1234)).toBe(21);
+  expect(Math.clz32(12345)).toBe(18);
+  expect(Math.clz32(123456)).toBe(15);
+  expect(Math.clz32(1234567)).toBe(11);
+  expect(Math.clz32(12345678)).toBe(8);
+  expect(Math.clz32(123456789)).toBe(5);
+  expect(Math.clz32(999999999)).toBe(2);
+  expect(Math.clz32(9999999999)).toBe(1);
+  expect(Math.clz32(99999999999)).toBe(1);
+  expect(Math.clz32(999999999999)).toBe(0);
+  expect(Math.clz32(9999999999999)).toBe(1);
+  expect(Math.clz32(99999999999999)).toBe(3);
+  expect(Math.clz32(999999999999999)).toBe(0);
 
-    expect(Math.clz32()).toBe(32);
-    expect(Math.clz32(NaN)).toBe(32);
-    expect(Math.clz32(Infinity)).toBe(32);
-    expect(Math.clz32(-Infinity)).toBe(32);
-    expect(Math.clz32(false)).toBe(32);
-    expect(Math.clz32(true)).toBe(31);
-    expect(Math.clz32(null)).toBe(32);
-    expect(Math.clz32(undefined)).toBe(32);
-    expect(Math.clz32([])).toBe(32);
-    expect(Math.clz32({})).toBe(32);
-    expect(Math.clz32("foo")).toBe(32);
+  expect(Math.clz32()).toBe(32);
+  expect(Math.clz32(NaN)).toBe(32);
+  expect(Math.clz32(Infinity)).toBe(32);
+  expect(Math.clz32(-Infinity)).toBe(32);
+  expect(Math.clz32(false)).toBe(32);
+  expect(Math.clz32(true)).toBe(31);
+  expect(Math.clz32(null)).toBe(32);
+  expect(Math.clz32(undefined)).toBe(32);
+  expect(Math.clz32([])).toBe(32);
+  expect(Math.clz32({})).toBe(32);
+  expect(Math.clz32("foo")).toBe(32);
 });

Libraries/LibJS/Tests/builtins/Math/Math.cos.js

@@ -1,14 +1,14 @@
 test("basic functionality", () => {
-    expect(Math.cos).toHaveLength(1);
+  expect(Math.cos).toHaveLength(1);
 
-    expect(Math.cos(0)).toBe(1);
-    expect(Math.cos(null)).toBe(1);
-    expect(Math.cos('')).toBe(1);
-    expect(Math.cos([])).toBe(1);
-    expect(Math.cos(Math.PI)).toBe(-1);
-    expect(Math.cos()).toBeNaN();
-    expect(Math.cos(undefined)).toBeNaN();
-    expect(Math.cos([1, 2, 3])).toBeNaN();
-    expect(Math.cos({})).toBeNaN();
-    expect(Math.cos("foo")).toBeNaN();
+  expect(Math.cos(0)).toBe(1);
+  expect(Math.cos(null)).toBe(1);
+  expect(Math.cos("")).toBe(1);
+  expect(Math.cos([])).toBe(1);
+  expect(Math.cos(Math.PI)).toBe(-1);
+  expect(Math.cos()).toBeNaN();
+  expect(Math.cos(undefined)).toBeNaN();
+  expect(Math.cos([1, 2, 3])).toBeNaN();
+  expect(Math.cos({})).toBeNaN();
+  expect(Math.cos("foo")).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.exp.js

@@ -1,13 +1,13 @@
 test("basic functionality", () => {
-    expect(Math.exp).toHaveLength(1);
+  expect(Math.exp).toHaveLength(1);
 
-    expect(Math.exp(0)).toBe(1);
-    expect(Math.exp(-2)).toBeCloseTo(0.135335);
-    expect(Math.exp(-1)).toBeCloseTo(0.367879);
-    expect(Math.exp(1)).toBeCloseTo(2.718281);
-    expect(Math.exp(2)).toBeCloseTo(7.389056);
+  expect(Math.exp(0)).toBe(1);
+  expect(Math.exp(-2)).toBeCloseTo(0.135335);
+  expect(Math.exp(-1)).toBeCloseTo(0.367879);
+  expect(Math.exp(1)).toBeCloseTo(2.718281);
+  expect(Math.exp(2)).toBeCloseTo(7.389056);
 
-    expect(Math.exp()).toBeNaN();
-    expect(Math.exp(undefined)).toBeNaN();
-    expect(Math.exp("foo")).toBeNaN();
+  expect(Math.exp()).toBeNaN();
+  expect(Math.exp(undefined)).toBeNaN();
+  expect(Math.exp("foo")).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.expm1.js

@@ -1,13 +1,13 @@
 test("basic functionality", () => {
-    expect(Math.expm1).toHaveLength(1);
+  expect(Math.expm1).toHaveLength(1);
 
-    expect(Math.expm1(0)).toBe(0);
-    expect(Math.expm1(-2)).toBeCloseTo(-0.864664);
-    expect(Math.expm1(-1)).toBeCloseTo(-0.632120);
-    expect(Math.expm1(1)).toBeCloseTo(1.718281);
-    expect(Math.expm1(2)).toBeCloseTo(6.389056);
+  expect(Math.expm1(0)).toBe(0);
+  expect(Math.expm1(-2)).toBeCloseTo(-0.864664);
+  expect(Math.expm1(-1)).toBeCloseTo(-0.63212);
+  expect(Math.expm1(1)).toBeCloseTo(1.718281);
+  expect(Math.expm1(2)).toBeCloseTo(6.389056);
 
-    expect(Math.expm1()).toBeNaN();
-    expect(Math.expm1(undefined)).toBeNaN();
-    expect(Math.expm1("foo")).toBeNaN();
+  expect(Math.expm1()).toBeNaN();
+  expect(Math.expm1(undefined)).toBeNaN();
+  expect(Math.expm1("foo")).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.floor.js

@@ -1,13 +1,13 @@
 test("basic functionality", () => {
-    expect(Math.floor).toHaveLength(1);
+  expect(Math.floor).toHaveLength(1);
 
-    expect(Math.floor(0.95)).toBe(0);
-    expect(Math.floor(4)).toBe(4);
-    expect(Math.floor(7.004)).toBe(7);
-    expect(Math.floor(-0.95)).toBe(-1);
-    expect(Math.floor(-4)).toBe(-4);
-    expect(Math.floor(-7.004)).toBe(-8);
+  expect(Math.floor(0.95)).toBe(0);
+  expect(Math.floor(4)).toBe(4);
+  expect(Math.floor(7.004)).toBe(7);
+  expect(Math.floor(-0.95)).toBe(-1);
+  expect(Math.floor(-4)).toBe(-4);
+  expect(Math.floor(-7.004)).toBe(-8);
 
-    expect(Math.floor()).toBeNaN();
-    expect(Math.floor(NaN)).toBeNaN();
+  expect(Math.floor()).toBeNaN();
+  expect(Math.floor(NaN)).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.log1p.js

@@ -1,8 +1,8 @@
 test("basic functionality", () => {
-    expect(Math.log1p).toHaveLength(1);
+  expect(Math.log1p).toHaveLength(1);
 
-    expect(Math.log1p(-2)).toBeNaN();
-    expect(Math.log1p(-1)).toBe(-Infinity);
-    // FIXME: expect(Math.log1p(0)).toBe(0);
-    // FIXME: expect(Math.log1p(1)).toBeCloseTo(0.693147);
+  expect(Math.log1p(-2)).toBeNaN();
+  expect(Math.log1p(-1)).toBe(-Infinity);
+  // FIXME: expect(Math.log1p(0)).toBe(0);
+  // FIXME: expect(Math.log1p(1)).toBeCloseTo(0.693147);
 });

Libraries/LibJS/Tests/builtins/Math/Math.max.js

@@ -1,10 +1,10 @@
 test("basic functionality", () => {
-    expect(Math.max).toHaveLength(2);
+  expect(Math.max).toHaveLength(2);
 
-    expect(Math.max()).toBe(-Infinity);
-    expect(Math.max(1)).toBe(1);
-    expect(Math.max(2, 1)).toBe(2);
-    expect(Math.max(1, 2, 3)).toBe(3);
-    expect(Math.max(NaN)).toBeNaN();
-    expect(Math.max("String", 1)).toBeNaN();
+  expect(Math.max()).toBe(-Infinity);
+  expect(Math.max(1)).toBe(1);
+  expect(Math.max(2, 1)).toBe(2);
+  expect(Math.max(1, 2, 3)).toBe(3);
+  expect(Math.max(NaN)).toBeNaN();
+  expect(Math.max("String", 1)).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.min.js

@@ -1,9 +1,9 @@
 test("basic functionality", () => {
-    expect(Math.min).toHaveLength(2);
+  expect(Math.min).toHaveLength(2);
 
-    expect(Math.min(1)).toBe(1);
-    expect(Math.min(2, 1)).toBe(1);
-    expect(Math.min(1, 2, 3)).toBe(1);
-    expect(Math.min(NaN)).toBeNaN();
-    expect(Math.min("String", 1)).toBeNaN();
+  expect(Math.min(1)).toBe(1);
+  expect(Math.min(2, 1)).toBe(1);
+  expect(Math.min(1, 2, 3)).toBe(1);
+  expect(Math.min(NaN)).toBeNaN();
+  expect(Math.min("String", 1)).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.pow.js

@@ -1,25 +1,25 @@
 test("basic functionality", () => {
-    expect(Math.pow).toHaveLength(2);
+  expect(Math.pow).toHaveLength(2);
 
-    expect(Math.pow(2, 0)).toBe(1);
-    expect(Math.pow(2, 1)).toBe(2);
-    expect(Math.pow(2, 2)).toBe(4);
-    expect(Math.pow(2, 3)).toBe(8);
-    expect(Math.pow(2, -3)).toBe(0.125);
-    expect(Math.pow(3, 2)).toBe(9);
-    expect(Math.pow(0, 0)).toBe(1);
-    expect(Math.pow(2, Math.pow(3, 2))).toBe(512);
-    expect(Math.pow(Math.pow(2, 3), 2)).toBe(64);
-    expect(Math.pow("2", "3")).toBe(8);
-    expect(Math.pow("", [])).toBe(1);
-    expect(Math.pow([], null)).toBe(1);
-    expect(Math.pow(null, null)).toBe(1);
-    expect(Math.pow(undefined, null)).toBe(1);
-    expect(Math.pow(NaN, 2)).toBeNaN();
-    expect(Math.pow(2, NaN)).toBeNaN();
-    expect(Math.pow(undefined, 2)).toBeNaN();
-    expect(Math.pow(2, undefined)).toBeNaN();
-    expect(Math.pow(null, undefined)).toBeNaN();
-    expect(Math.pow(2, "foo")).toBeNaN();
-    expect(Math.pow("foo", 2)).toBeNaN();
+  expect(Math.pow(2, 0)).toBe(1);
+  expect(Math.pow(2, 1)).toBe(2);
+  expect(Math.pow(2, 2)).toBe(4);
+  expect(Math.pow(2, 3)).toBe(8);
+  expect(Math.pow(2, -3)).toBe(0.125);
+  expect(Math.pow(3, 2)).toBe(9);
+  expect(Math.pow(0, 0)).toBe(1);
+  expect(Math.pow(2, Math.pow(3, 2))).toBe(512);
+  expect(Math.pow(Math.pow(2, 3), 2)).toBe(64);
+  expect(Math.pow("2", "3")).toBe(8);
+  expect(Math.pow("", [])).toBe(1);
+  expect(Math.pow([], null)).toBe(1);
+  expect(Math.pow(null, null)).toBe(1);
+  expect(Math.pow(undefined, null)).toBe(1);
+  expect(Math.pow(NaN, 2)).toBeNaN();
+  expect(Math.pow(2, NaN)).toBeNaN();
+  expect(Math.pow(undefined, 2)).toBeNaN();
+  expect(Math.pow(2, undefined)).toBeNaN();
+  expect(Math.pow(null, undefined)).toBeNaN();
+  expect(Math.pow(2, "foo")).toBeNaN();
+  expect(Math.pow("foo", 2)).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.sign.js

@@ -1,38 +1,36 @@
 function isPositiveZero(value) {
-    return value === 0 && 1 / value === Infinity;
+  return value === 0 && 1 / value === Infinity;
 }
 
 function isNegativeZero(value) {
-    return value === 0 && 1 / value === -Infinity;
+  return value === 0 && 1 / value === -Infinity;
 }
 
 test("basic functionality", () => {
-    expect(Math.sign).toHaveLength(1);
+  expect(Math.sign).toHaveLength(1);
 
-    expect(Math.sign.length).toBe(1);
+  expect(Math.sign(0.0001)).toBe(1);
+  expect(Math.sign(1)).toBe(1);
+  expect(Math.sign(42)).toBe(1);
+  expect(Math.sign(Infinity)).toBe(1);
+  expect(isPositiveZero(Math.sign(0))).toBeTrue();
+  expect(isPositiveZero(Math.sign(null))).toBeTrue();
+  expect(isPositiveZero(Math.sign(""))).toBeTrue();
+  expect(isPositiveZero(Math.sign([]))).toBeTrue();
 
-    expect(Math.sign(0.0001)).toBe(1);
-    expect(Math.sign(1)).toBe(1);
-    expect(Math.sign(42)).toBe(1);
-    expect(Math.sign(Infinity)).toBe(1);
-    expect(isPositiveZero(Math.sign(0))).toBeTrue();
-    expect(isPositiveZero(Math.sign(null))).toBeTrue();
-    expect(isPositiveZero(Math.sign(''))).toBeTrue();
-    expect(isPositiveZero(Math.sign([]))).toBeTrue();
+  expect(Math.sign(-0.0001)).toBe(-1);
+  expect(Math.sign(-1)).toBe(-1);
+  expect(Math.sign(-42)).toBe(-1);
+  expect(Math.sign(-Infinity)).toBe(-1);
+  expect(isNegativeZero(Math.sign(-0))).toBeTrue();
+  expect(isNegativeZero(Math.sign(-null))).toBeTrue();
+  expect(isNegativeZero(Math.sign(-""))).toBeTrue();
+  expect(isNegativeZero(Math.sign(-[]))).toBeTrue();
 
-    expect(Math.sign(-0.0001)).toBe(-1);
-    expect(Math.sign(-1)).toBe(-1);
-    expect(Math.sign(-42)).toBe(-1);
-    expect(Math.sign(-Infinity)).toBe(-1);
-    expect(isNegativeZero(Math.sign(-0))).toBeTrue();
-    expect(isNegativeZero(Math.sign(-null))).toBeTrue();
-    expect(isNegativeZero(Math.sign(-''))).toBeTrue();
-    expect(isNegativeZero(Math.sign(-[]))).toBeTrue();
-
-    expect(Math.sign()).toBeNaN();
-    expect(Math.sign(undefined)).toBeNaN();
-    expect(Math.sign([1, 2, 3])).toBeNaN();
-    expect(Math.sign({})).toBeNaN();
-    expect(Math.sign(NaN)).toBeNaN();
-    expect(Math.sign("foo")).toBeNaN();
+  expect(Math.sign()).toBeNaN();
+  expect(Math.sign(undefined)).toBeNaN();
+  expect(Math.sign([1, 2, 3])).toBeNaN();
+  expect(Math.sign({})).toBeNaN();
+  expect(Math.sign(NaN)).toBeNaN();
+  expect(Math.sign("foo")).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.sin.js

@@ -1,15 +1,15 @@
 test("basic functionality", () => {
-    expect(Math.sin).toHaveLength(1);
+  expect(Math.sin).toHaveLength(1);
 
-    expect(Math.sin(0)).toBe(0);
-    expect(Math.sin(null)).toBe(0);
-    expect(Math.sin('')).toBe(0);
-    expect(Math.sin([])).toBe(0);
-    expect(Math.sin(Math.PI * 3 / 2)).toBe(-1);
-    expect(Math.sin(Math.PI / 2)).toBe(1);
-    expect(Math.sin()).toBeNaN();
-    expect(Math.sin(undefined)).toBeNaN();
-    expect(Math.sin([1, 2, 3])).toBeNaN();
-    expect(Math.sin({})).toBeNaN();
-    expect(Math.sin("foo")).toBeNaN();
+  expect(Math.sin(0)).toBe(0);
+  expect(Math.sin(null)).toBe(0);
+  expect(Math.sin("")).toBe(0);
+  expect(Math.sin([])).toBe(0);
+  expect(Math.sin((Math.PI * 3) / 2)).toBe(-1);
+  expect(Math.sin(Math.PI / 2)).toBe(1);
+  expect(Math.sin()).toBeNaN();
+  expect(Math.sin(undefined)).toBeNaN();
+  expect(Math.sin([1, 2, 3])).toBeNaN();
+  expect(Math.sin({})).toBeNaN();
+  expect(Math.sin("foo")).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.sqrt.js

@@ -1,4 +1,4 @@
 test("basic functionality", () => {
-    expect(Math.sqrt).toHaveLength(1);
-    expect(Math.sqrt(9)).toBe(3);
+  expect(Math.sqrt).toHaveLength(1);
+  expect(Math.sqrt(9)).toBe(3);
 });

Libraries/LibJS/Tests/builtins/Math/Math.tan.js

@@ -1,14 +1,14 @@
 test("basic functionality", () => {
-    expect(Math.tan).toHaveLength(1);
+  expect(Math.tan).toHaveLength(1);
 
-    expect(Math.tan(0)).toBe(0);
-    expect(Math.tan(null)).toBe(0);
-    expect(Math.tan('')).toBe(0);
-    expect(Math.tan([])).toBe(0);
-    expect(Math.ceil(Math.tan(Math.PI / 4))).toBe(1);
-    expect(Math.tan()).toBeNaN();
-    expect(Math.tan(undefined)).toBeNaN();
-    expect(Math.tan([1, 2, 3])).toBeNaN();
-    expect(Math.tan({})).toBeNaN();
-    expect(Math.tan("foo")).toBeNaN();
+  expect(Math.tan(0)).toBe(0);
+  expect(Math.tan(null)).toBe(0);
+  expect(Math.tan("")).toBe(0);
+  expect(Math.tan([])).toBe(0);
+  expect(Math.ceil(Math.tan(Math.PI / 4))).toBe(1);
+  expect(Math.tan()).toBeNaN();
+  expect(Math.tan(undefined)).toBeNaN();
+  expect(Math.tan([1, 2, 3])).toBeNaN();
+  expect(Math.tan({})).toBeNaN();
+  expect(Math.tan("foo")).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Math/Math.trunc.js

@@ -1,12 +1,12 @@
 test("basic functionality", () => {
-    expect(Math.trunc).toHaveLength(1);
+  expect(Math.trunc).toHaveLength(1);
 
-    expect(Math.trunc(13.37)).toBe(13);
-    expect(Math.trunc(42.84)).toBe(42);
-    expect(Math.trunc(0.123)).toBe( 0);
-    expect(Math.trunc(-0.123)).toBe(-0);
+  expect(Math.trunc(13.37)).toBe(13);
+  expect(Math.trunc(42.84)).toBe(42);
+  expect(Math.trunc(0.123)).toBe(0);
+  expect(Math.trunc(-0.123)).toBe(-0);
 
-    expect(Math.trunc(NaN)).toBeNaN();
-    expect(Math.trunc('foo')).toBeNaN();
-    expect(Math.trunc()).toBeNaN();
+  expect(Math.trunc(NaN)).toBeNaN();
+  expect(Math.trunc("foo")).toBeNaN();
+  expect(Math.trunc()).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/NaN/NaN.js

@@ -1,13 +1,13 @@
 test("basic functionality", () => {
-    const nan = undefined + 1;
+  const nan = undefined + 1;
 
-    expect(nan + "").toBe("NaN");
-    expect(NaN + "").toBe("NaN");
-    expect(nan !== nan).toBeTrue();
-    expect(NaN !== NaN).toBeTrue();
-    expect(nan).toBeNaN();
-    expect(NaN).toBeNaN();
-    expect(0).not.toBeNaN();
-    expect(!!nan).toBeFalse();
-    expect(!!NaN).toBeFalse();
+  expect(nan + "").toBe("NaN");
+  expect(NaN + "").toBe("NaN");
+  expect(nan !== nan).toBeTrue();
+  expect(NaN !== NaN).toBeTrue();
+  expect(nan).toBeNaN();
+  expect(NaN).toBeNaN();
+  expect(0).not.toBeNaN();
+  expect(!!nan).toBeFalse();
+  expect(!!NaN).toBeFalse();
 });

Libraries/LibJS/Tests/builtins/Number/Number-constants.js

@@ -1,11 +1,11 @@
 test("basic functionality", () => {
-    expect(Number.EPSILON).toBe(2 ** -52);
-    expect(Number.EPSILON).toBeGreaterThan(0);
-    expect(Number.MAX_SAFE_INTEGER).toBe(2 ** 53 - 1);
-    expect(Number.MAX_SAFE_INTEGER + 1).toBe(Number.MAX_SAFE_INTEGER + 2);
-    expect(Number.MIN_SAFE_INTEGER).toBe(-(2 ** 53 - 1));
-    expect(Number.MIN_SAFE_INTEGER - 1).toBe(Number.MIN_SAFE_INTEGER - 2);
-    expect(Number.POSITIVE_INFINITY).toBe(Infinity);
-    expect(Number.NEGATIVE_INFINITY).toBe(-Infinity);
-    expect(Number.NaN).toBeNaN();
+  expect(Number.EPSILON).toBe(2 ** -52);
+  expect(Number.EPSILON).toBeGreaterThan(0);
+  expect(Number.MAX_SAFE_INTEGER).toBe(2 ** 53 - 1);
+  expect(Number.MAX_SAFE_INTEGER + 1).toBe(Number.MAX_SAFE_INTEGER + 2);
+  expect(Number.MIN_SAFE_INTEGER).toBe(-(2 ** 53 - 1));
+  expect(Number.MIN_SAFE_INTEGER - 1).toBe(Number.MIN_SAFE_INTEGER - 2);
+  expect(Number.POSITIVE_INFINITY).toBe(Infinity);
+  expect(Number.NEGATIVE_INFINITY).toBe(-Infinity);
+  expect(Number.NaN).toBeNaN();
 });

Libraries/LibJS/Tests/builtins/Number/Number.isFinite.js

@@ -1,24 +1,24 @@
 test("basic functionality", () => {
-    expect(Number.isFinite).toHaveLength(1);
-    expect(Number.isFinite).not.toBe(isFinite);
+  expect(Number.isFinite).toHaveLength(1);
+  expect(Number.isFinite).not.toBe(isFinite);
 
-    expect(Number.isFinite(0)).toBeTrue();
-    expect(Number.isFinite(1.23)).toBeTrue();
-    expect(Number.isFinite(42)).toBeTrue();
+  expect(Number.isFinite(0)).toBeTrue();
+  expect(Number.isFinite(1.23)).toBeTrue();
+  expect(Number.isFinite(42)).toBeTrue();
 
-    expect(Number.isFinite("")).toBeFalse();
-    expect(Number.isFinite("0")).toBeFalse();
-    expect(Number.isFinite("42")).toBeFalse();
-    expect(Number.isFinite(true)).toBeFalse();
-    expect(Number.isFinite(false)).toBeFalse();
-    expect(Number.isFinite(null)).toBeFalse();
-    expect(Number.isFinite([])).toBeFalse();
-    expect(Number.isFinite()).toBeFalse();
-    expect(Number.isFinite(NaN)).toBeFalse();
-    expect(Number.isFinite(undefined)).toBeFalse();
-    expect(Number.isFinite(Infinity)).toBeFalse();
-    expect(Number.isFinite(-Infinity)).toBeFalse();
-    expect(Number.isFinite("foo")).toBeFalse();
-    expect(Number.isFinite({})).toBeFalse();
-    expect(Number.isFinite([1, 2, 3])).toBeFalse();
+  expect(Number.isFinite("")).toBeFalse();
+  expect(Number.isFinite("0")).toBeFalse();
+  expect(Number.isFinite("42")).toBeFalse();
+  expect(Number.isFinite(true)).toBeFalse();
+  expect(Number.isFinite(false)).toBeFalse();
+  expect(Number.isFinite(null)).toBeFalse();
+  expect(Number.isFinite([])).toBeFalse();
+  expect(Number.isFinite()).toBeFalse();
+  expect(Number.isFinite(NaN)).toBeFalse();
+  expect(Number.isFinite(undefined)).toBeFalse();
+  expect(Number.isFinite(Infinity)).toBeFalse();
+  expect(Number.isFinite(-Infinity)).toBeFalse();
+  expect(Number.isFinite("foo")).toBeFalse();
+  expect(Number.isFinite({})).toBeFalse();
+  expect(Number.isFinite([1, 2, 3])).toBeFalse();
 });

Libraries/LibJS/Tests/builtins/Number/Number.isInteger.js

@@ -1,32 +1,32 @@
 test("basic functionality", () => {
-    expect(Number.isInteger).toHaveLength(1);
+  expect(Number.isInteger).toHaveLength(1);
 
-    expect(Number.isInteger(0)).toBeTrue();
-    expect(Number.isInteger(42)).toBeTrue();
-    expect(Number.isInteger(-10000)).toBeTrue();
-    expect(Number.isInteger(5)).toBeTrue();
-    expect(Number.isInteger(5.0)).toBeTrue();
-    expect(Number.isInteger(5 + 1/10000000000000000)).toBeTrue();
-    // FIXME: values outside of i32's range should still return true
-    // expect(Number.isInteger(+2147483647 + 1)).toBeTrue();
-    // expect(Number.isInteger(-2147483648 - 1)).toBeTrue();
-    // expect(Number.isInteger(99999999999999999999999999999999999)).toBeTrue();
+  expect(Number.isInteger(0)).toBeTrue();
+  expect(Number.isInteger(42)).toBeTrue();
+  expect(Number.isInteger(-10000)).toBeTrue();
+  expect(Number.isInteger(5)).toBeTrue();
+  expect(Number.isInteger(5.0)).toBeTrue();
+  expect(Number.isInteger(5 + 1 / 10000000000000000)).toBeTrue();
+  // FIXME: values outside of i32's range should still return true
+  // expect(Number.isInteger(+2147483647 + 1)).toBeTrue();
+  // expect(Number.isInteger(-2147483648 - 1)).toBeTrue();
+  // expect(Number.isInteger(99999999999999999999999999999999999)).toBeTrue();
 
-    expect(Number.isInteger(5 + 1/1000000000000000)).toBeFalse();
-    expect(Number.isInteger(1.23)).toBeFalse();
-    expect(Number.isInteger("")).toBeFalse();
-    expect(Number.isInteger("0")).toBeFalse();
-    expect(Number.isInteger("42")).toBeFalse();
-    expect(Number.isInteger(true)).toBeFalse();
-    expect(Number.isInteger(false)).toBeFalse();
-    expect(Number.isInteger(null)).toBeFalse();
-    expect(Number.isInteger([])).toBeFalse();
-    expect(Number.isInteger(Infinity)).toBeFalse();
-    expect(Number.isInteger(-Infinity)).toBeFalse();
-    expect(Number.isInteger(NaN)).toBeFalse();
-    expect(Number.isInteger()).toBeFalse();
-    expect(Number.isInteger(undefined)).toBeFalse();
-    expect(Number.isInteger("foo")).toBeFalse();
-    expect(Number.isInteger({})).toBeFalse();
-    expect(Number.isInteger([1, 2, 3])).toBeFalse();
+  expect(Number.isInteger(5 + 1 / 1000000000000000)).toBeFalse();
+  expect(Number.isInteger(1.23)).toBeFalse();
+  expect(Number.isInteger("")).toBeFalse();
+  expect(Number.isInteger("0")).toBeFalse();
+  expect(Number.isInteger("42")).toBeFalse();
+  expect(Number.isInteger(true)).toBeFalse();
+  expect(Number.isInteger(false)).toBeFalse();
+  expect(Number.isInteger(null)).toBeFalse();
+  expect(Number.isInteger([])).toBeFalse();
+  expect(Number.isInteger(Infinity)).toBeFalse();
+  expect(Number.isInteger(-Infinity)).toBeFalse();
+  expect(Number.isInteger(NaN)).toBeFalse();
+  expect(Number.isInteger()).toBeFalse();
+  expect(Number.isInteger(undefined)).toBeFalse();
+  expect(Number.isInteger("foo")).toBeFalse();
+  expect(Number.isInteger({})).toBeFalse();
+  expect(Number.isInteger([1, 2, 3])).toBeFalse();
 });

Libraries/LibJS/Tests/builtins/Number/Number.isNaN.js

@@ -1,25 +1,25 @@
 test("basic functionality", () => {
-    expect(Number.isNaN).toHaveLength(1);
-    expect(Number.isNaN).not.toBe(isNaN);
+  expect(Number.isNaN).toHaveLength(1);
+  expect(Number.isNaN).not.toBe(isNaN);
 
-    expect(Number.isNaN(0)).toBeFalse();
-    expect(Number.isNaN(42)).toBeFalse();
-    expect(Number.isNaN("")).toBeFalse();
-    expect(Number.isNaN("0")).toBeFalse();
-    expect(Number.isNaN("42")).toBeFalse();
-    expect(Number.isNaN(true)).toBeFalse();
-    expect(Number.isNaN(false)).toBeFalse();
-    expect(Number.isNaN(null)).toBeFalse();
-    expect(Number.isNaN([])).toBeFalse();
-    expect(Number.isNaN(Infinity)).toBeFalse();
-    expect(Number.isNaN(-Infinity)).toBeFalse();
-    expect(Number.isNaN()).toBeFalse();
-    expect(Number.isNaN(undefined)).toBeFalse();
-    expect(Number.isNaN("foo")).toBeFalse();
-    expect(Number.isNaN({})).toBeFalse();
-    expect(Number.isNaN([1, 2, 3])).toBeFalse();
+  expect(Number.isNaN(0)).toBeFalse();
+  expect(Number.isNaN(42)).toBeFalse();
+  expect(Number.isNaN("")).toBeFalse();
+  expect(Number.isNaN("0")).toBeFalse();
+  expect(Number.isNaN("42")).toBeFalse();
+  expect(Number.isNaN(true)).toBeFalse();
+  expect(Number.isNaN(false)).toBeFalse();
+  expect(Number.isNaN(null)).toBeFalse();
+  expect(Number.isNaN([])).toBeFalse();
+  expect(Number.isNaN(Infinity)).toBeFalse();
+  expect(Number.isNaN(-Infinity)).toBeFalse();
+  expect(Number.isNaN()).toBeFalse();
+  expect(Number.isNaN(undefined)).toBeFalse();
+  expect(Number.isNaN("foo")).toBeFalse();
+  expect(Number.isNaN({})).toBeFalse();
+  expect(Number.isNaN([1, 2, 3])).toBeFalse();
 
-    expect(Number.isNaN(NaN)).toBeTrue();
-    expect(Number.isNaN(Number.NaN)).toBeTrue();
-    expect(Number.isNaN(0 / 0)).toBeTrue();
+  expect(Number.isNaN(NaN)).toBeTrue();
+  expect(Number.isNaN(Number.NaN)).toBeTrue();
+  expect(Number.isNaN(0 / 0)).toBeTrue();
 });

Libraries/LibJS/Tests/builtins/Number/Number.isSafeInteger.js

@@ -1,24 +1,24 @@
 test("basic functionality", () => {
-    expect(Number.isSafeInteger).toHaveLength(1);
+  expect(Number.isSafeInteger).toHaveLength(1);
 
-    expect(Number.isSafeInteger(0)).toBeTrue();
-    expect(Number.isSafeInteger(1)).toBeTrue();
-    expect(Number.isSafeInteger(2.0)).toBeTrue();
-    expect(Number.isSafeInteger(42)).toBeTrue();
-    expect(Number.isSafeInteger(Number.MAX_SAFE_INTEGER)).toBeTrue();
-    expect(Number.isSafeInteger(Number.MIN_SAFE_INTEGER)).toBeTrue();
+  expect(Number.isSafeInteger(0)).toBeTrue();
+  expect(Number.isSafeInteger(1)).toBeTrue();
+  expect(Number.isSafeInteger(2.0)).toBeTrue();
+  expect(Number.isSafeInteger(42)).toBeTrue();
+  expect(Number.isSafeInteger(Number.MAX_SAFE_INTEGER)).toBeTrue();
+  expect(Number.isSafeInteger(Number.MIN_SAFE_INTEGER)).toBeTrue();
 
-    expect(Number.isSafeInteger()).toBeFalse();
-    expect(Number.isSafeInteger("1")).toBeFalse();
-    expect(Number.isSafeInteger(2.1)).toBeFalse();
-    expect(Number.isSafeInteger(42.42)).toBeFalse();
-    expect(Number.isSafeInteger("")).toBeFalse();
-    expect(Number.isSafeInteger([])).toBeFalse();
-    expect(Number.isSafeInteger(null)).toBeFalse();
-    expect(Number.isSafeInteger(undefined)).toBeFalse();
-    expect(Number.isSafeInteger(NaN)).toBeFalse();
-    expect(Number.isSafeInteger(Infinity)).toBeFalse();
-    expect(Number.isSafeInteger(-Infinity)).toBeFalse();
-    expect(Number.isSafeInteger(Number.MAX_SAFE_INTEGER + 1)).toBeFalse();
-    expect(Number.isSafeInteger(Number.MIN_SAFE_INTEGER - 1)).toBeFalse();
+  expect(Number.isSafeInteger()).toBeFalse();
+  expect(Number.isSafeInteger("1")).toBeFalse();
+  expect(Number.isSafeInteger(2.1)).toBeFalse();
+  expect(Number.isSafeInteger(42.42)).toBeFalse();
+  expect(Number.isSafeInteger("")).toBeFalse();
+  expect(Number.isSafeInteger([])).toBeFalse();
+  expect(Number.isSafeInteger(null)).toBeFalse();
+  expect(Number.isSafeInteger(undefined)).toBeFalse();
+  expect(Number.isSafeInteger(NaN)).toBeFalse();
+  expect(Number.isSafeInteger(Infinity)).toBeFalse();
+  expect(Number.isSafeInteger(-Infinity)).toBeFalse();
+  expect(Number.isSafeInteger(Number.MAX_SAFE_INTEGER + 1)).toBeFalse();
+  expect(Number.isSafeInteger(Number.MIN_SAFE_INTEGER - 1)).toBeFalse();
 });