| // 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. |
| esid: sec-delete-operator-runtime-semantics-evaluation |
| description: > |
| delete operator returns false when deleting a non-configurable |
| data property |
| flags: [noStrict] |
| ---*/ |
| |
| 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; |
| |
| assert.sameValue(d, false, 'd'); |
| assert.sameValue(o.hasOwnProperty('foo'), true, 'o.hasOwnProperty("foo")'); |
