Blame dom/base/test/test_window_extensible.html
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<html>
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https://bugzilla.mozilla.org/show_bug.cgi?id=856384
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-->
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<head>
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<meta charset="UTF-8">
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<title>Test for Bug 856384</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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Mozilla Bug 856384
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<iframe name="constructor" src="about:blank"></iframe>
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<script type="application/javascript">
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SimpleTest.waitForExplicitFinish();
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function run()
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{
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is(Object.isExtensible(window), true, "Windows are extensible by default");
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try
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{
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Object.preventExtensions(window);
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throw "didn't throw";
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}
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catch (e)
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{
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is(e instanceof TypeError, true,
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"preventExtensions(window) should throw a TypeError, instead got: " + e);
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is(Object.isExtensible(window), true,
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'Windows are extensible after an extensibility "change" attempt');
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}
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SimpleTest.finish();
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}
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window.addEventListener("load", run);
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</script>
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</body>
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</html>
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