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42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
// Copyright (C) 2019 Sergey Rubanov. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: >
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Invocation of the instance's `then` method
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esid: sec-promise.any
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info: |
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5. Let result be PerformPromiseAny(iteratorRecord, C, promiseCapability).
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6. If result is an abrupt completion, then
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a. If iteratorRecord.[[Done]] is false, set result to IteratorClose(iteratorRecord, result).
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b. IfAbruptRejectPromise(result, promiseCapability).
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Runtime Semantics: PerformPromiseAny
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r. Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], rejectElement »).
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flags: [async]
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features: [Promise.any, arrow-function]
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---*/
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let promises = [
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Promise.resolve(),
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Promise.resolve(),
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Promise.resolve(),
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];
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let callCount = 0;
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promises.forEach(promise => {
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let boundThen = promise.then.bind(promise);
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promise.then = function(...args) {
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assert.sameValue(this, promises[callCount]);
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callCount += 1;
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return boundThen(...args);
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};
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});
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Promise.any(promises)
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.then(() => {
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assert.sameValue(callCount, 3, '`then` invoked once for every iterated value');
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}).then($DONE, $DONE);
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