JSTests/ChakraCore/test/Strings/string_object_indices_589140.js

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

if (this.WScript && this.WScript.LoadScriptFile) { // Check for running in ch
    this.WScript.LoadScriptFile("..\\UnitTestFramework\\UnitTestFramework.js");
}

var tests = [
    {
        name: "Setting property with name == new string.length creates a property",
        body: function () {
            var s = new String(0);
            s[0] = 0;
            s[1] = 1;
            s[2] = 2;
            
            assert.areEqual(1, s.length, "new String(0) has length == 1");
            assert.areEqual('0', s[0], "new String(0) has character '0' at property named 0");
            assert.isFalse(0 === s[0], "Setting property with name < string.length doesn't work");
            assert.areEqual(1, s[1], "Setting property with name == string.length works");
            assert.areEqual(2, s[2], "Setting property with name > string.length works");
            
            var s = new String(123);
            s[0] = 0;
            s[1] = 1;
            s[2] = 2;
            s[3] = 3;
            s[4] = 4;
            
            assert.areEqual(3, s.length, "new String(123) has length == 3");
            assert.areEqual('1', s[0], "new String(123) has character '1' at property named 0");
            assert.isFalse(0 === s[0], "Setting property with name < string.length doesn't work");
            assert.areEqual('2', s[1], "new String(123) has character '2' at property named 1");
            assert.isFalse(1 === s[1], "Setting property with name < string.length doesn't work");
            assert.areEqual('3', s[2], "new String(123) has character '3' at property named 2");
            assert.isFalse(2 === s[2], "Setting property with name < string.length doesn't work");
            assert.areEqual(3, s[3], "Setting property with name == string.length works");
            assert.areEqual(4, s[4], "Setting property with name > string.length works");
        }
    },
];

testRunner.runTests(tests);