| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 23.1.3.5 |
| description: > |
| New keys are visited if created during forEach execution. |
| info: | |
| Map.prototype.forEach ( callbackfn [ , thisArg ] ) |
| |
| ... |
| 5. If thisArg was supplied, let T be thisArg; else let T be undefined. |
| 6. Let entries be the List that is the value of M’s [[MapData]] internal slot. |
| 7. Repeat for each Record {[[key]], [[value]]} e that is an element of |
| entries, in original key insertion order |
| a. If e.[[key]] is not empty, then |
| i. Let funcResult be Call(callbackfn, T, «e.[[value]], e.[[key]], M»). |
| ii. ReturnIfAbrupt(funcResult). |
| ... |
| ---*/ |
| |
| var map = new Map(); |
| map.set('foo', 0); |
| map.set('bar', 1); |
| |
| var count = 0; |
| var results = []; |
| |
| map.forEach(function(value, key) { |
| if (count === 0) { |
| map.set('baz', 2); |
| } |
| results.push({ |
| value: value, |
| key: key |
| }); |
| count++; |
| }); |
| |
| assert.sameValue(count, 3); |
| assert.sameValue(map.size, 3); |
| |
| assert.sameValue(results[0].key, 'foo'); |
| assert.sameValue(results[0].value, 0); |
| |
| assert.sameValue(results[1].key, 'bar'); |
| assert.sameValue(results[1].value, 1); |
| |
| assert.sameValue(results[2].key, 'baz'); |
| assert.sameValue(results[2].value, 2); |