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27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
/// Copyright (c) 2012 Ecma International. All rights reserved.
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/// Ecma International makes this code available under the terms and conditions set
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/// forth on http://hg.ecmascript.org/tests/test262/raw-file/tip/LICENSE (the
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/// "Use Terms"). Any redistribution of this code must retain the above
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/// copyright and this notice and otherwise comply with the Use Terms.
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/**
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* This test is actually testing the [[Delete]] internal method (8.12.8). Since the
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* language provides no way to directly exercise [[Delete]], the tests are placed here.
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*
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* @path ch11/11.4/11.4.1/11.4.1-4.a-3.js
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* @description delete operator returns false when deleting a non-configurable data property
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*/
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function testcase() {
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var o = {};
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var desc = { value : 1, configurable: false }; // all other attributes default to false
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Object.defineProperty(o, "foo", desc);
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// Now, deleting o.foo should fail because [[Configurable]] on foo is false.
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var d = delete o.foo;
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if (d === false && o.hasOwnProperty("foo") === true) {
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return true;
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}
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}
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runTestCase(testcase);
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