| // 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); |