test/webkit/fast/js/Promise-init.js

// Copyright 2014 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
//
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// modification, are permitted provided that the following conditions
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// Flags: --harmony
'use strict';
description('Test Promise construction.');

var thisInInit;
var resolve, reject;
var result;
var promise = new Promise(function(newResolve, newReject) {
  thisInInit = this;
  resolve = newResolve;
  reject = newReject;
});

shouldBeTrue('promise instanceof Promise');
shouldBe('promise.constructor', 'Promise');
shouldBe('thisInInit', 'undefined');
shouldBeTrue('resolve instanceof Function');
shouldBeTrue('reject instanceof Function');

shouldThrow('new Promise()', '"TypeError: Promise resolver undefined is not a function"');
shouldThrow('new Promise(37)', '"TypeError: Promise resolver 37 is not a function"');

try {
  promise = new Promise(function() { throw Error('foo'); });
  testPassed('promise = new Promise(function() { throw Error("foo"); }) did not throw exception.');
} catch (e) {
  testFailed('new Promise(function() { throw Error(\'foo\'); }) should not throw an exception.');
}

promise.then(undefined, function(localResult) {
  result = localResult;
  shouldBeEqualToString('result.message', 'foo');
});

new Promise(function(resolve) {
  resolve("hello");
  throw Error("foo");
}).then(function(localResult) {
  result = localResult;
  testPassed('fulfilled');
  shouldBeEqualToString('result', 'hello');
  finishJSTest();
}, function(localResult) {
  result = localResult;
  testFailed('rejected');
  finishJSTest();
});