LibJS: Add Math.min()

Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/003741db1c3

Libraries/LibJS/Runtime/MathObject.cpp

@@ -41,6 +41,7 @@ MathObject::MathObject()
     put_native_function("ceil", ceil, 1);
     put_native_function("round", round, 1);
     put_native_function("max", max, 2);
+    put_native_function("min", min, 2);
     put_native_function("trunc", trunc, 1);
 
     put("E", Value(M_E));
@@ -139,6 +140,22 @@ Value MathObject::max(Interpreter& interpreter)
     }
 }
 
+Value MathObject::min(Interpreter& interpreter)
+{
+    if (!interpreter.argument_count())
+        return js_infinity();
+
+    if (interpreter.argument_count() == 1)
+        return interpreter.argument(0).to_number();
+
+    Value max = interpreter.argument(0).to_number();
+    for (size_t i = 1; i < interpreter.argument_count(); ++i) {
+        Value cur = interpreter.argument(i).to_number();
+        max = Value(cur.as_double() < max.as_double() ? cur : max);
+    }
+    return max;
+}
+
 Value MathObject::trunc(Interpreter& interpreter)
 {
     if (!interpreter.argument_count())

Libraries/LibJS/Runtime/MathObject.h

@@ -45,6 +45,7 @@ private:
     static Value ceil(Interpreter&);
     static Value round(Interpreter&);
     static Value max(Interpreter&);
+    static Value min(Interpreter&);
     static Value trunc(Interpreter&);
 };
 

Libraries/LibJS/Tests/Math.min.js

@@ -0,0 +1,12 @@
+try {
+    assert(Math.min.length === 2);
+    assert(Math.min(1) === 1);
+    assert(Math.min(2, 1) === 1);
+    assert(Math.min(1, 2, 3) === 1);
+    assert(isNaN(Math.max(NaN)));
+    assert(isNaN(Math.max("String", 1)));
+
+    console.log("PASS");
+} catch {
+    console.log("FAIL");
+}