// Copyright (c) 2012 Ecma International. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- info: > This test is actually testing the [[Delete]] internal method (8.12.8). Since the language provides no way to directly exercise [[Delete]], the tests are placed here. es5id: 11.4.1-4.a-3 description: > delete operator returns false when deleting a non-configurable data property flags: [noStrict] includes: [runTestCase.js] ---*/ function testcase() { var o = {}; var desc = { value : 1, configurable: false }; // all other attributes default to false Object.defineProperty(o, "foo", desc); // Now, deleting o.foo should fail because [[Configurable]] on foo is false. var d = delete o.foo; if (d === false && o.hasOwnProperty("foo") === true) { return true; } } runTestCase(testcase);