v8/test/webkit/fast/js/Promise-catch.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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//     documentation and/or other materials provided with the distribution.
//
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// Flags: --harmony --ignore-unhandled-promises
'use strict';
description('Test Promise.prototype.catch.');

var reject;
var result;
var thisInInit;
var thisInOnFulfilled;

var firstPromise = new Promise(function(_, newReject) {
  thisInInit = this;
  reject = newReject;
});

var secondPromise = firstPromise.catch(function(localResult) {
  thisInOnFulfilled = this;
  shouldBe('thisInOnFulfilled', 'undefined');
  result = localResult;
  shouldBeEqualToString('result', 'hello');
  return 'bye';
});

secondPromise.then(function(localResult) {
  result = localResult;
  shouldBeEqualToString('result', 'bye');
  testPassed('fulfilled');
  finishJSTest();
}, function() {
  testFailed('rejected');
  finishJSTest();
});

shouldBe('thisInInit', 'undefined');
shouldBeTrue('firstPromise instanceof Promise');
shouldBeTrue('secondPromise instanceof Promise');

try {
  firstPromise.catch(null);
} catch (e) {
  testFailed('catch(null) should not throw an exception');
}
try {
  firstPromise.catch(37);
} catch (e) {
  testFailed('catch(37) should not throw an exception');
}

reject('hello');