test/built-ins/Promise/race/S25.4.4.3_A4.1_T2.js


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

/*---
es6id: S25.4.4.3_A4.1_T2
author: Sam Mikes
description: Promise.race rejects if IteratorStep throws
features: [Symbol.iterator]
flags: [async]
---*/

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

Promise.race(iterThrows).then(function () {
    $ERROR('Promise unexpectedly fulfilled: Promise.race(iterThrows) should throw TypeError');
},function (err) {
    if (!(err instanceof TypeError)) {
        $ERROR('Expected TypeError, got ' + err);
    }
}).then($DONE,$DONE);