| // 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 retrieving an iterator's `return` method generates an error while |
| closing the iterator with throw completion, this error should be suppressed. |
| info: | |
| AsyncIteratorClose ( iteratorRecord, completion ) |
| |
| [...] |
| 4. Let innerResult be GetMethod(iterator, "return"). |
| 5. If innerResult.[[Type]] is normal, |
| [...] |
| 6. If completion.[[Type]] is throw, return Completion(completion). |
| 7. If innerResult.[[Type]] is throw, return Completion(innerResult). |
| |
| GetMethod ( V, P ) |
| |
| [...] |
| 2. Let func be ? GetV(V, P). |
| 3. If func is either undefined or null, return undefined. |
| 4. If IsCallable(func) is false, throw a TypeError exception. |
| features: [async-iteration] |
| flags: [async] |
| ---*/ |
| |
| const asyncIterable = {}; |
| asyncIterable[Symbol.asyncIterator] = function() { |
| return { |
| next: function() { |
| return { done: false, value: null }; |
| }, |
| return: true, |
| }; |
| }; |
| |
| let iterationCount = 0; |
| const promise = (async function() { |
| for await (const x of asyncIterable) { |
| iterationCount += 1; |
| throw new Test262Error("should not be overriden"); |
| } |
| })(); |
| |
| promise.then(function(value) { |
| throw new Test262Error("Promise should be rejected, got: " + value); |
| }, function(error) { |
| assert.sameValue(error.constructor, Test262Error); |
| assert.sameValue(iterationCount, 1, "The loop body is evaluated"); |
| }).then($DONE, $DONE); |