| // Copyright (C) 2020 Alexey Shvayka. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-asynciteratorclose |
| description: > |
| If iterator's "return" method is `null`, |
| received non-throw completion is forwarded to the runtime. |
| info: | |
| AsyncIteratorClose ( iteratorRecord, completion ) |
| |
| [...] |
| 4. Let innerResult be GetMethod(iterator, "return"). |
| 5. If innerResult.[[Type]] is normal, |
| a. Let return be innerResult.[[Value]]. |
| b. If return is undefined, return Completion(completion). |
| |
| GetMethod ( V, P ) |
| |
| [...] |
| 2. Let func be ? GetV(V, P). |
| 3. If func is either undefined or null, return undefined. |
| features: [Symbol.asyncIterator, async-iteration] |
| flags: [async] |
| ---*/ |
| |
| var iterationCount = 0; |
| var returnGets = 0; |
| |
| var iterable = {}; |
| iterable[Symbol.asyncIterator] = function() { |
| return { |
| next: function() { |
| return {value: 1, done: false}; |
| }, |
| get return() { |
| returnGets += 1; |
| return null; |
| }, |
| }; |
| }; |
| |
| (async function() { |
| for await (var _ of iterable) { |
| iterationCount += 1; |
| break; |
| } |
| |
| assert.sameValue(iterationCount, 1); |
| assert.sameValue(returnGets, 1); |
| }()).then($DONE, $DONE); |