| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: Map traversal using for..of |
| info: | |
| Map instances should be able to be traversed using a `for...of` loop. |
| es6id: 13.6.4 |
| features: [Map] |
| ---*/ |
| |
| var map = new Map(); |
| var obj = {}; |
| var iterationCount = 0; |
| |
| var first = [0, 'a']; |
| var second = [true, false]; |
| var third = [null, undefined]; |
| var fourth = [NaN, obj]; |
| |
| map.set(0, 'a'); |
| map.set(true, false); |
| map.set(null, undefined); |
| map.set(NaN, obj); |
| |
| for (var x of map) { |
| assert.sameValue(x[0], first[0]); |
| assert.sameValue(x[1], first[1]); |
| first = second; |
| second = third; |
| third = fourth; |
| fourth = null; |
| iterationCount += 1; |
| } |
| |
| assert.sameValue(iterationCount, 4); |