Promise-chained-then.js 2.77 KB
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// Copyright 2014 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1.  Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
// 2.  Redistributions in binary form must reproduce the above copyright //     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// Flags: --harmony
'use strict';
description('Test chained Promise.prototype.then.');

var resolve;
var promise = new Promise(function (r) {resolve = r;});
var result;

promise.then(function(localResult) {  // fulfilled - continue
  testPassed('fulfilled');
  result = localResult;
  shouldBeEqualToString('result', 'hello');
  return 'hello2';
}, function() {
  testFailed('rrejected');
}).then()  // pass through
.then(function(localResult) {  // fulfilled - throw an exception
  testPassed('fulfilled');
  result = localResult;
  shouldBeEqualToString('result', 'hello2');
  throw 'error';
}, function() {
  testFailed('rejected');
}).then(function() {  // rejected - throw an exception
  testFailed('fulfilled');
}, function(localResult) {
  testPassed('rejected');
  result = localResult;
  shouldBeEqualToString('result', 'error');
  throw 'error2';
}).then() // pass through
.then(function() {  // rejected - recover
  testFailed('fulfilled');
}, function(localResult) {
  testPassed('rejected');
  result = localResult;
  shouldBeEqualToString('result', 'error2');
  return 'recovered';
}).then(function(localResult) {  // fulfilled - the last
  testPassed('fulfilled');
  result = localResult;
  shouldBeEqualToString('result', 'recovered');
  finishJSTest();
}, function() {
  testFailed('rejected');
  finishJSTest();
});

resolve('hello');
debug('This should be the first debug output.');