// 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-1 description: > delete operator returns true when deleting a configurable data property ---*/ var o = {}; var desc = { value: 1, configurable: true }; Object.defineProperty(o, "foo", desc); var d = delete o.foo; assert.sameValue(d, true, 'd'); assert.sameValue(o.hasOwnProperty("foo"), false, 'o.hasOwnProperty("foo")');