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substring.js

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//-------------------------------------------------------------------------------------------------------

// Copyright (C) Microsoft. All rights reserved.

// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.

//-------------------------------------------------------------------------------------------------------

// Testing our implementation of the substring, making sure that we keep the correct reference

// of the original string so that it doesn't get collected

var s = new String();

s = s + 'a';

s = s + 'b';

s = s + 'c';

s = s + 'd';

s = s + 'e';

var s1 = s.substr(1,3);

var s2 = s1.substr(1,2);

s = undefined;

s1 = undefined;

//implicit calls

function foo()

{

var a = 1;

var b = 2;

var obj = {toString: function(){ a=3; return "Hello World";}};

a = b;

Object.prototype.substring = String.prototype.substring;

var f = obj.substring(2,7);

WScript.Echo (a);

}

foo();

CollectGarbage();

WScript.Echo(s2);