JSTests/test262/test/built-ins/Promise/race/S25.4.4.3_A2.2_T3.js

// Copyright 2014 Cubane Canada, Inc.  All rights reserved.
// See LICENSE for details.

/*---
info: |
    Promise.race rejects when GetIterator() returns an abrupt completion
    4. Let iterator be GetIterator(iterable).
    5. IfAbruptRejectPromise(iterator, promiseCapability)
es6id: S25.4.4.3_A2.2_T3
author: Sam Mikes
description: Promise.race rejects if GetIterator throws
features: [Symbol.iterator]
flags: [async]
---*/

var iterThrows = {};
Object.defineProperty(iterThrows, Symbol.iterator, {
  get: function() {
    throw new Error("abrupt completion");
  }
});

Promise.race(iterThrows).then(function() {
  throw new Test262Error('Promise unexpectedly fulfilled: Promise.race(iterThrows) should throw');
}, function(err) {
  assert(!!(err instanceof Error), 'The value of !!(err instanceof Error) is expected to be true');
}).then($DONE, $DONE);