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// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
description: >
Error thrown when accessing the instance's `then` method (closing iterator)
esid: sec-promise.race
es6id: 25.4.4.3
info: |
11. Let result be PerformPromiseRace(iteratorRecord, C, promiseCapability).
12. If result is an abrupt completion,
a. If iteratorRecord.[[done]] is false, let result be
IteratorClose(iterator, result).
b. IfAbruptRejectPromise(result, promiseCapability).
[...]
25.4.4.3.1 Runtime Semantics: PerformPromiseRace
1. Repeat
[...]
j. Let result be Invoke(nextPromise, "then",
«promiseCapability.[[Resolve]], promiseCapability.[[Reject]]»).
k. ReturnIfAbrupt(result).
features: [Symbol.iterator]
---*/
var promise = new Promise(function() {});
var iter = {};
var returnCount = 0;
iter[Symbol.iterator] = function() {
return {
next: function() {
return {
done: false,
value: promise
};
},
return: function() {
returnCount += 1;
return {};
}
};
};
Object.defineProperty(promise, 'then', {
get: function() {
throw new Test262Error();
}
});
Promise.race(iter);
assert.sameValue(returnCount, 1);
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