11.4.1-4.a-1.js (738B)
1 // Copyright (c) 2012 Ecma International. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 info: | 6 This test is actually testing the [[Delete]] internal method (8.12.8). Since the 7 language provides no way to directly exercise [[Delete]], the tests are placed here. 8 esid: sec-delete-operator-runtime-semantics-evaluation 9 description: > 10 delete operator returns true when deleting a configurable data 11 property 12 ---*/ 13 14 var o = {}; 15 16 var desc = { 17 value: 1, 18 configurable: true, 19 }; 20 Object.defineProperty(o, 'foo', desc); 21 22 var d = delete o.foo; 23 24 assert.sameValue(d, true, 'd'); 25 assert.sameValue(o.hasOwnProperty('foo'), false, 'o.hasOwnProperty("foo")'); 26 27 reportCompare(0, 0);