JSTests/ChakraCore/test/es6/ES6ArrayUseConstructor_v5.js

//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------

// Disabling ES6 Array builtins using this['constructor'] property to construct their return values

WScript.LoadScriptFile("..\\UnitTestFramework\\UnitTestFramework.js");

var tests = [
    {
        name: "Array.prototype.concat",
        body: function () {
            var arr = ['a','b','c'];
            arr['constructor'] = Number;

            var out = Array.prototype.concat.call(arr, [1,2,3]);

            assert.isTrue(Array.isArray(out), "Return from Array.prototype.concat should be an Array object");
            assert.isFalse(out instanceof Number, "Return from Array.prototype.concat should not have been constructed from Number");
            assert.areEqual(6, out.length, "Array.prototype.concat sets the length property of returned object");
        }
    },
    {
        name: "Array.prototype.filter",
        body: function () {
            var arr = ['a','b','c'];
            arr['constructor'] = Number;

            var out = Array.prototype.filter.call(arr, function() { return true; });

            assert.isTrue(Array.isArray(out), "Return from Array.prototype.filter should be an Array object");
            assert.isFalse(out instanceof Number, "Return from Array.prototype.filter should not have been constructed from Number");
            assert.areEqual(3, out.length, "Array.prototype.filter does not set the length property of returned object, but it is Array.");
        }
    },
    {
        name: "Array.prototype.map",
        body: function () {
            var arr = ['a','b','c'];
            arr['constructor'] = Number;

            var out = Array.prototype.map.call(arr, function(val) { return val; });

            assert.isTrue(Array.isArray(out), "Return from Array.prototype.map should be an Array object");
            assert.isFalse(out instanceof Number, "Return from Array.prototype.map should not have been constructed from Number");
            assert.areEqual(3, out.length, "Array.prototype.map does not set the length property of returned object, but it is Array.");
        }
    },
    {
        name: "Array.prototype.slice",
        body: function () {
            var arr = ['a','b','c'];
            arr['constructor'] = Number;

            var out = Array.prototype.slice.call(arr);

            assert.isTrue(Array.isArray(out), "Return from Array.prototype.slice should be an Array object");
            assert.isFalse(out instanceof Number, "Return from Array.prototype.slice should not have been constructed from Number");
            assert.areEqual(3, out.length, "Array.prototype.slice sets the length property of returned object");
        }
    },
    {
        name: "Array.prototype.splice",
        body: function () {
            var arr = ['a','b','c','d','e','f'];
            arr['constructor'] = Number;

            var out = Array.prototype.splice.call(arr, 0, 3);

            assert.isTrue(Array.isArray(out), "Return from Array.prototype.splice should be an Array object");
            assert.isFalse(out instanceof Number, "Return from Array.prototype.splice should not have been constructed from Number");
            assert.areEqual(3, out.length, "Array.prototype.splice sets the length property of returned object");
        }
    },
];

testRunner.runTests(tests, { verbose: WScript.Arguments[0] != "summary" });