| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-weakmap-iterable |
| description: > |
| If the iterable argument is empty, return new WeakMap object. |
| info: | |
| 23.3.1.1 WeakMap ( [ iterable ] ) |
| |
| ... |
| 9. Repeat |
| a. Let next be IteratorStep(iter). |
| b. ReturnIfAbrupt(next). |
| c. If next is false, return map. |
| ... |
| ---*/ |
| |
| var counter = 0; |
| var set = WeakMap.prototype.set; |
| WeakMap.prototype.set = function(value) { |
| counter++; |
| return set.call(this, value); |
| }; |
| var map = new WeakMap([]); |
| |
| assert.sameValue(Object.getPrototypeOf(map), WeakMap.prototype); |
| assert(map instanceof WeakMap); |
| assert.sameValue( |
| counter, 0, |
| 'empty iterable does not call WeakMap.prototype.set' |
| ); |
