LibJS/test-js: Create test-js program, prepare for test suite refactor

This moves most of the work from run-tests.sh to test-js.cpp. This way,
we have a lot more control over how the test suite runs, as well as how
it outputs. This should result in some cool functionality!

This commit also refactors test-common.js to mimic the jest library.
This should allow tests to be much more expressive :)

Libraries/LibJS/Tests/test-common.js

@@ -1,116 +1,34 @@
-/**
- * Custom error for failed assertions.
- * @constructor
- * @param {string} message Error message
- * @returns Error
- */
-function AssertionError(message) {
-    var instance = new Error(message);
-    instance.name = 'AssertionError';
-    Object.setPrototypeOf(instance, Object.getPrototypeOf(this));
-    return instance;
-}
+let describe;
+let test;
+let expect;
 
-/**
- * Throws an `AssertionError` if `value` is not truthy.
- * @param {*} value Value to be tested
- */
-function assert(value) {
-    if (!value)
-        throw new AssertionError("The assertion failed!");
-}
+// Stores the results of each test and suite. Has a terrible
+// name to avoid name collision.
+let __TestResults__ = {};
 
-/**
- * Throws an `AssertionError` when called.
- * @throws {AssertionError}
- */
-function assertNotReached() {
-    throw new AssertionError("assertNotReached() was reached!");
-}
+// This array is used to communicate with the C++ program. It treats
+// each message in this array as a separate message. Has a terrible
+// name to avoid name collision.
+let __UserOutput__ = [];
 
-/**
- * Ensures the provided functions throws a specific error.
- * @param {Function} testFunction Function executing the throwing code
- * @param {object} [options]
- * @param {Error} [options.error] Expected error type
- * @param {string} [options.name] Expected error name
- * @param {string} [options.message] Expected error message
- */
-function assertThrowsError(testFunction, options) {
-    try {
-        testFunction();
-        assertNotReached();
-    } catch (e) {
-        if (options.error !== undefined)
-            assert(e instanceof options.error);
-        if (options.name !== undefined)
-            assert(e.name === options.name);
-        if (options.message !== undefined)
-            assert(e.message === options.message);
-    }
-}
-
-/**
- * Ensures the provided JavaScript source code results in a SyntaxError
- * @param {string} source The JavaScript source code to compile
- */
-function assertIsSyntaxError(source) {
-    assertThrowsError(() => {
-        new Function(source)();
-    }, {
-        error: SyntaxError,
-    });
-}
-
-/**
- * Ensures the provided arrays contain exactly the same items.
- * @param {Array} a First array
- * @param {Array} b Second array
- */
-function assertArrayEquals(a, b) {
-    if (a.length != b.length)
-        throw new AssertionError("Array lengths do not match");
-    
-    for (var i = 0; i < a.length; i++) {
-        if (a[i] !== b[i])
-            throw new AssertionError("Elements do not match");
-    }
-}
-
-const assertVisitsAll = (testFunction, expectedOutput) => {
-    const visited = [];
-    testFunction(value => visited.push(value));
-    assert(visited.length === expectedOutput.length);
-    expectedOutput.forEach((value, i) => assert(visited[i] === value));
+// We also rebind console.log here to use the array above
+console.log = (...args) => {
+    __UserOutput__.push(args.join(" "));
 };
 
-/**
- * Check whether the difference between two numbers is less than 0.000001.
- * @param {Number} a First number
- * @param {Number} b Second number
- */
-function isClose(a, b) {
-    return Math.abs(a - b) < 0.000001;
-}
+// Use an IIFE to avoid polluting the global namespace as much as possible
+(() => {
 
-/**
- * Quick and dirty deep equals method.
- * @param {*} a First value
- * @param {*} b Second value
- */
-function assertDeepEquals(a, b) {
-    assert(deepEquals(a, b));
-}
-
-function deepEquals(a, b) {
+// FIXME: This is a very naive deepEquals algorithm
+const deepEquals = (a, b) => {
     if (Array.isArray(a))
         return Array.isArray(b) && deepArrayEquals(a, b);
     if (typeof a === "object")
         return typeof b === "object" && deepObjectEquals(a, b);
-    return a === b;
+    return Object.is(a, b);
 }
 
-function deepArrayEquals(a, b) {
+const deepArrayEquals = (a, b) => {
     if (a.length !== b.length)
         return false;
     for (let i = 0; i < a.length; ++i) {
@@ -120,7 +38,7 @@ function deepArrayEquals(a, b) {
     return true;
 }
 
-function deepObjectEquals(a, b) {
+const deepObjectEquals = (a, b) => {
     if (a === null)
         return b === null;
     for (let key of Reflect.ownKeys(a)) {
@@ -129,3 +47,321 @@ function deepObjectEquals(a, b) {
     }
     return true;
 }
+
+class ExpectationError extends Error {
+    constructor(message, fileName, lineNumber) {
+        super(message, fileName, lineNumber);
+        this.name = "ExpectationError";
+    }
+}
+
+class Expector {
+    constructor(target, inverted) {
+        this.target = target;
+        this.inverted = !!inverted;
+    }
+
+    get not() {
+        return new Expector(this.target, !this.inverted);
+    }
+
+    toBe(value) {
+        this.__doMatcher(() => {
+            this.__expect(Object.is(this.target, value));
+        });
+    }
+
+    toHaveLength(length) {
+        this.__doMatcher(() => {
+            this.__expect(Object.is(this.target.length, length));
+        });
+    }
+
+    toHaveProperty(property, value) {
+        this.__doMatcher(() => {
+            let object = this.target;
+    
+            if (typeof property === "string" && property.includes(".")) {
+                let propertyArray = [];
+    
+                while (true) {
+                    let index = property.indexOf(".");
+                    if (index === -1) {
+                        propertyArray.push(property);
+                        break;
+                    }
+    
+                    propertyArray.push(property.substring(0, index));
+                    property = property.substring(index, property.length);
+                }
+    
+                property = propertyArray;
+            }
+    
+            if (Array.isArray(property)) {
+                for (let key of property) {
+                    if (object === undefined || object === null) {
+                        if (this.inverted)
+                            return;
+                        throw new ExpectationError();
+                    }
+                    object = object[key];
+                }
+            } else {
+                object = object[property];
+            }
+
+            this.__expect(object !== undefined);
+            if (value !== undefined)
+                this.__expect(deepEquals(object, value));
+        });
+    }
+
+    toBeCloseTo(number, numDigits) {
+        if (numDigits === undefined)
+            numDigits = 2;
+
+        this.__doMatcher(() => {
+            this.__expect(Math.abs(number - this.target) < (10 ** -numDigits / numDigits));
+        });
+    }
+
+    toBeDefined() {
+        this.__doMatcher(() => {
+            this.__expect(this.target !== undefined);
+        });
+    }
+
+    toBeFalsey() {
+        this.__doMatcher(() => {
+            this.__expect(!this.target);
+        });
+    }
+
+    toBeGreaterThan(number) {
+        this.__doMatcher(() => {
+            this.__expect(this.target > number);
+        });
+    }
+
+    toBeGreaterThanOrEqual(number) {
+        this.__doMatcher(() => {
+            this.__expect(this.target >= number);
+        });
+    }
+
+    toBeLessThan(number) {
+        this.__doMatcher(() => {
+            this.__expect(this.target < number);
+        });
+    }
+
+    toBeLessThanOrEqual(number) {
+        this.__doMatcher(() => {
+            this.__expect(this.target <= number);
+        });
+    }
+
+    toBeInstanceOf(class_) {
+        this.__doMatcher(() => {
+            this.__expect(this.target instanceof class_);
+        });
+    }
+
+    toBeNull() {
+        this.__doMatcher(() => {
+            this.__expect(this.target === null);
+        });
+    }
+
+    toBeTruthy() {
+        this.__doMatcher(() => {
+            this.__expect(!!this.target);
+        });
+    }
+
+    toBeUndefined() {
+        this.__doMatcher(() => {
+            this.__expect(this.target === undefined);
+        });
+    }
+
+    toBeNaN() {
+        this.__doMatcher(() => {
+            this.__expect(isNaN(this.target));
+        });
+    }
+
+    toContain(item) {
+        this.__doMatcher(() => {
+            // FIXME: Iterator check
+            for (let element of this.target) {
+                if (item === element)
+                    return;
+            }
+            
+            throw new ExpectationError();
+        });
+    }
+
+    toContainEqual(item) {
+        this.__doMatcher(() => {
+            // FIXME: Iterator check
+            for (let element of this.target) {
+                if (deepEquals(item, element))
+                    return;
+            }
+            
+            throw new ExpectationError();
+        });
+    }
+
+    toEqual(value) {
+        this.__doMatcher(() => {
+            this.__expect(deepEquals(this.target, value));
+        });
+    }
+
+    toThrow(value) {
+        this.__expect(typeof this.target === "function");
+        this.__expect(typeof value === "string" || typeof value === "function" || value === undefined);
+
+        this.__doMatcher(() => {
+            try {
+                this.target();
+                this.__expect(false);
+            } catch (e) {
+                if (typeof value === "string") {
+                    this.__expect(e.message.includes(value));
+                } else if (typeof value === "function") {
+                    this.__expect(e instanceof value);
+                }
+            }
+        });
+    }
+
+    pass(message) {
+        // FIXME: This does nothing. If we want to implement things
+        // like assertion count, this will have to do something
+    }
+
+    // jest-extended
+    fail(message) {
+        // FIXME: message is currently ignored
+        this.__doMatcher(() => {
+            this.__expect(false);
+        })
+    }
+
+    // jest-extended
+    toThrowWithMessage(class_, message) {
+        this.__expect(typeof this.target === "function");
+        this.__expect(class_ !== undefined);
+        this.__expect(message !== undefined);
+
+        this.__doMatcher(() => {
+            try {
+                this.target();
+                this.__expect(false);
+            } catch (e) {
+                this.__expect(e instanceof class_);
+                this.__expect(e.message.includes(message));
+            }
+        });
+    }
+
+    // Test for syntax errors; target must be a string
+    toEval() {
+        this.__expect(typeof this.target === "string");
+
+        if (!this.inverted) {
+            try {
+                new Function(this.target)();
+            } catch (e) {
+                throw new ExpectationError();
+            }
+        } else {
+            try {
+                new Function(this.target)();
+                throw new ExpectationError();
+            } catch (e) {
+                if (e.name !== "SyntaxError") 
+                    throw new ExpectationError();
+            }
+        }
+    }
+
+    // Must compile regardless of inverted-ness
+    toEvalTo(value) {
+        this.__expect(typeof this.target === "string");
+
+        let result;
+
+        try {
+            result = new Function(this.target)();
+        } catch (e) {
+            throw new ExpectationError();
+        }
+
+        this.__doMatcher(() => {
+            this.__expect(deepEquals(value, result));
+        });
+    }
+
+    __doMatcher(matcher) {
+        if (!this.inverted) {
+            matcher();
+        } else {
+            let threw = false;
+            try {
+                matcher();
+            } catch (e) {
+                if (e.name === "ExpectationError")
+                    threw = true;
+            }
+            if (!threw)
+                throw new ExpectationError();
+        }
+    }
+
+    __expect(value) {
+        if (value !== true)
+            throw new ExpectationError();
+    }
+}
+
+expect = value => new Expector(value);
+
+// describe is able to lump test results inside of it by using this context
+// variable. Top level tests are assumed to be in the default context
+const defaultSuiteMessage = "__$$TOP_LEVEL$$__";
+let suiteMessage = defaultSuiteMessage;
+
+describe = (message, callback) => {
+    suiteMessage = message;
+    callback();
+    suiteMessage = defaultSuiteMessage;
+}
+
+test = (message, callback) => {
+    if (!__TestResults__[suiteMessage])
+        __TestResults__[suiteMessage] = {};
+
+    const suite = __TestResults__[suiteMessage];
+
+    if (!suite[message])
+        suite[message] = {};
+
+    try {
+        callback();
+        suite[message] = {
+            passed: true,
+        };
+    } catch (e) {
+        suite[message] = {
+            passed: false,
+        };
+    }
+}
+
+})();

Meta/Lagom/CMakeLists.txt

@@ -75,6 +75,12 @@ if (BUILD_LAGOM)
     target_link_libraries(js_lagom stdc++)
     target_link_libraries(js_lagom pthread)
 
+    add_executable(test-js_lagom ../../Userland/test-js.cpp)
+    set_target_properties(test-js_lagom PROPERTIES OUTPUT_NAME test-js)
+    target_link_libraries(test-js_lagom Lagom)
+    target_link_libraries(test-js_lagom stdc++)
+    target_link_libraries(test-js_lagom pthread)
+
     add_executable(test-crypto_lagom ../../Userland/test-crypto.cpp)
     set_target_properties(test-crypto_lagom PROPERTIES OUTPUT_NAME test-crypto)
     target_link_libraries(test-crypto_lagom Lagom)

Userland/CMakeLists.txt

@@ -32,4 +32,5 @@ target_link_libraries(pape LibGUI)
 target_link_libraries(paste LibGUI)
 target_link_libraries(pro LibProtocol)
 target_link_libraries(test-crypto LibCrypto LibTLS LibLine)
+target_link_libraries(test-js LibJS LibLine LibCore)
 target_link_libraries(tt LibPthread)

Userland/test-js.cpp

@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) 2020, Matthew Olsson <matthewcolsson@gmail.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/JsonValue.h>
+#include <AK/JsonObject.h>
+#include <AK/LogStream.h>
+#include <LibCore/File.h>
+#include <LibJS/Interpreter.h>
+#include <LibJS/Lexer.h>
+#include <LibJS/Parser.h>
+#include <LibJS/Runtime/Array.h>
+#include <LibJS/Runtime/GlobalObject.h>
+#include <LibJS/Runtime/MarkedValueList.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define TOP_LEVEL_TEST_NAME "__$$TOP_LEVEL$$__"
+
+// FIXME: Will eventually not be necessary when all tests are converted
+Vector<String> tests_to_run = {
+    "add-values-to-primitive.js",
+    "automatic-semicolon-insertion.js",
+    "comments-basic.js",
+    "debugger-statement.js",
+    "empty-statements.js",
+    "exception-ReferenceError.js",
+    "exponentiation-basic.js",
+    "indexed-access-string-object.js",
+    "invalid-lhs-in-assignment.js",
+    "tagged-template-literals.js",
+    "switch-basic.js",
+    "update-expression-on-member-expression.js",
+};
+
+struct FileTest {
+    String name;
+    bool passed;
+};
+
+struct FileSuite {
+    String name;
+    int passed { 0 };
+    int failed { 0 };
+    Vector<FileTest> tests {};
+};
+
+struct TestError {
+    JS::Parser::Error error;
+    String hint;
+};
+
+struct FileResults {
+    String file;
+    Optional<TestError> error {};
+    int passed { 0 };
+    int failed { 0 };
+    Vector<FileSuite> suites {};
+};
+
+struct Results {
+    Vector<FileResults> file_results {};
+};
+
+Optional<TestError> parse_and_run_file(JS::Interpreter& interpreter, const String& path)
+{
+    auto file = Core::File::construct(path);
+    auto result = file->open(Core::IODevice::ReadOnly);
+    ASSERT(result);
+
+    auto contents = file->read_all();
+    String test_file_string(reinterpret_cast<const char*>(contents.data()), contents.size());
+    file->close();
+
+    auto parser = JS::Parser(JS::Lexer(test_file_string));
+    auto program = parser.parse_program();
+
+    if (parser.has_errors()) {
+        auto error = parser.errors()[0];
+        return TestError { error, error.source_location_hint(test_file_string) };
+    } else {
+        interpreter.run(interpreter.global_object(), *program);
+    }
+
+    return {};
+}
+
+FileResults run_test(const String& path, const String& test_root)
+{
+    auto interpreter = JS::Interpreter::create<JS::GlobalObject>();
+
+    if (parse_and_run_file(*interpreter, String::format("%s/test-common.js", test_root.characters())).has_value()) {
+        dbg() << "test-common.js failed to parse";
+        exit(1);
+    }
+
+    auto source_file_result = parse_and_run_file(*interpreter, String::format("%s/%s", test_root.characters(), path.characters()));
+    if (source_file_result.has_value())
+        return { path, source_file_result };
+
+    // Print any output
+    // FIXME: Should be printed to stdout in a nice format
+    auto& arr = interpreter->get_variable("__UserOutput__", interpreter->global_object()).as_array();
+    for (auto& entry : arr.indexed_properties()) {
+        dbg() << "OUTPUT: " << entry.value_and_attributes(&interpreter->global_object()).value.to_string(*interpreter);
+    }
+
+    // FIXME: This is _so_ scuffed
+    auto result = interpreter->get_variable("__TestResults__", interpreter->global_object());
+    auto json_object = interpreter->get_variable("JSON", interpreter->global_object());
+    auto stringify = json_object.as_object().get("stringify");
+    JS::MarkedValueList arguments(interpreter->heap());
+    arguments.append(result);
+    auto json_string = interpreter->call(stringify.as_function(), interpreter->this_value(interpreter->global_object()), move(arguments)).to_string(*interpreter);
+
+    auto json_result = JsonValue::from_string(json_string);
+
+    if (!json_result.has_value()) {
+        dbg() << "BAD JSON:";
+        dbg() << json_string;
+        return {};
+    }
+
+    auto json = json_result.value();
+
+    FileResults results { path };
+
+    json.as_object().for_each_member([&](const String& property, const JsonValue& value) {
+        FileSuite suite { property };
+
+        value.as_object().for_each_member([&](const String& property1, const JsonValue& value1) {
+            FileTest test { property1, false };
+
+            if (value1.is_object()) {
+                auto obj = value1.as_object();
+                if (obj.has("passed")) {
+                    auto passed = obj.get("passed");
+                    test.passed = passed.is_bool() && passed.as_bool();
+                }
+            }
+
+            if (test.passed) {
+                suite.passed++;
+            } else {
+                suite.failed++;
+            }
+
+            suite.tests.append(test);
+        });
+
+        if (suite.failed) {
+            results.failed++;
+        } else {
+            results.passed++;
+        }
+
+        results.suites.append(suite);
+    });
+
+    return results;
+}
+
+bool skip_test(char* test_name)
+{
+    return !strcmp(test_name, "test-common.js") || !strcmp(test_name, "run_tests.sh");
+}
+
+enum Modifier {
+    BG_RED,
+    BG_GREEN,
+    FG_RED,
+    FG_GREEN,
+    FG_GRAY,
+    FG_BLACK,
+    FG_BOLD,
+    CLEAR,
+};
+
+void print_modifiers(Vector<Modifier> modifiers)
+{
+    for (auto& modifier : modifiers) {
+        auto code = [&]() -> String {
+            switch (modifier) {
+            case BG_RED:
+                return "\033[48;2;255;0;102m";
+            case BG_GREEN:
+                return "\033[48;2;102;255;0m";
+            case FG_RED:
+                return "\033[38;2;255;0;102m";
+            case FG_GREEN:
+                return "\033[38;2;102;255;0m";
+            case FG_GRAY:
+                return "\033[38;2;135;139;148m";
+            case FG_BLACK:
+                return "\033[30m";
+            case FG_BOLD:
+                return "\033[1m";
+            case CLEAR:
+                return "\033[0m";
+            }
+            ASSERT_NOT_REACHED();
+        };
+        printf("%s", code().characters());
+    }
+}
+
+void print_file_results(const FileResults& results)
+{
+    if (results.failed || results.error.has_value()) {
+        print_modifiers({ BG_RED, FG_BLACK, FG_BOLD });
+        printf(" FAIL ");
+        print_modifiers({ CLEAR });
+    } else {
+        print_modifiers({ BG_GREEN, FG_BLACK, FG_BOLD });
+        printf(" PASS ");
+        print_modifiers({ CLEAR });
+    }
+
+    printf(" %s\n", results.file.characters());
+
+    if (results.error.has_value()) {
+        auto test_error = results.error.value();
+
+        print_modifiers({ FG_RED });
+        printf("       ❌ The file failed to parse\n\n");
+        print_modifiers({ FG_GRAY });
+        for (auto& message : test_error.hint.split('\n', true)) {
+            printf("            %s\n", message.characters());
+        }
+        print_modifiers({ FG_RED });
+        printf("            %s\n\n", test_error.error.to_string().characters());
+
+        return;
+    }
+
+    if (results.failed) {
+        for (auto& suite : results.suites) {
+            if (!suite.failed)
+                continue;
+
+            bool top_level = suite.name == TOP_LEVEL_TEST_NAME;
+
+            if (!top_level) {
+                print_modifiers({ FG_GRAY, FG_BOLD });
+                printf("       ❌ Suite:  ");
+                print_modifiers({ CLEAR, FG_RED });
+                printf("%s\n", suite.name.characters());
+                print_modifiers({ CLEAR });
+            }
+
+            for (auto& test : suite.tests) {
+                if (test.passed)
+                    continue;
+
+                if (!top_level) {
+                    print_modifiers({ FG_GRAY, FG_BOLD });
+                    printf("            Test: ");
+                    print_modifiers({ CLEAR, FG_RED });
+                    printf("%s\n", test.name.characters());
+                    print_modifiers({ CLEAR });
+                } else {
+                    print_modifiers({ FG_GRAY, FG_BOLD });
+                    printf("       ❌ Test:   ");
+                    print_modifiers({ CLEAR, FG_RED });
+                    printf("%s\n", test.name.characters());
+                    print_modifiers({ CLEAR });
+                }
+            }
+        }
+    }
+}
+
+void print_results(const Results& results, double time_elapsed)
+{
+    for (auto& result : results.file_results)
+        print_file_results(result);
+
+    int suites_passed = 0;
+    int suites_failed = 0;
+    int tests_passed = 0;
+    int tests_failed = 0;
+
+    for (auto& file_result : results.file_results) {
+        for (auto& suite : file_result.suites) {
+            tests_passed += suite.passed;
+            tests_failed += suite.failed;
+
+            if (suite.failed) {
+                suites_failed++;
+            } else {
+                suites_passed++;
+            }
+        }
+    }
+
+
+    printf("\nTest Suites: ");
+    if (suites_failed) {
+        print_modifiers({ FG_RED });
+        printf("%d failed, ", suites_failed);
+        print_modifiers({ CLEAR });
+    }
+    if (suites_passed) {
+        print_modifiers({ FG_GREEN });
+        printf("%d passed, ", suites_passed);
+        print_modifiers({ CLEAR });
+    }
+    printf("%d total\n", suites_failed + suites_passed);
+
+    printf("Tests:       ");
+    if (tests_failed) {
+        print_modifiers({ FG_RED });
+        printf("%d failed, ", tests_failed);
+        print_modifiers({ CLEAR });
+    }
+    if (tests_passed) {
+        print_modifiers({ FG_GREEN });
+        printf("%d passed, ", tests_passed);
+        print_modifiers({ CLEAR });
+    }
+    printf("%d total\n", tests_failed + tests_passed);
+
+    printf("Time:        %-.3fs\n\n", time_elapsed);
+}
+
+double get_time()
+{
+    struct timeval tv1;
+    struct timezone tz1;
+    auto return_code = gettimeofday(&tv1, &tz1);
+    ASSERT(return_code >= 0);
+    return static_cast<double>(tv1.tv_sec) + static_cast<double>(tv1.tv_usec) / 1'000'000;
+}
+
+int main(int, char** argv)
+{
+    String test_root = argv[1];
+    Results results;
+
+    double start_time = get_time();
+
+    for (auto& test : tests_to_run)
+        results.file_results.append(run_test(test, test_root));
+
+    print_results(results, get_time() - start_time);
+
+    return 0;
+}
+