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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 library unittest.future_matchers; | |
| 6 | |
| 7 import 'dart:async'; | |
| 8 | |
| 9 import 'package:matcher/matcher.dart' hide throws, throwsA, expect, fail; | |
| 10 | |
| 11 import 'expect.dart'; | |
| 12 import 'invoker.dart'; | |
| 13 import 'utils.dart'; | |
| 14 | |
| 15 /// Matches a [Future] that completes successfully with a value. | |
| 16 /// | |
| 17 /// Note that this creates an asynchronous expectation. The call to `expect()` | |
| 18 /// that includes this will return immediately and execution will continue. | |
| 19 /// Later, when the future completes, the actual expectation will run. | |
| 20 /// | |
| 21 /// To test that a Future completes with an exception, you can use [throws] and | |
| 22 /// [throwsA]. | |
| 23 final Matcher completes = const _Completes(null, ''); | |
| 24 | |
| 25 /// Matches a [Future] that completes succesfully with a value that matches | |
| 26 /// [matcher]. | |
| 27 /// | |
| 28 /// Note that this creates an asynchronous expectation. The call to | |
| 29 /// `expect()` that includes this will return immediately and execution will | |
| 30 /// continue. Later, when the future completes, the actual expectation will run. | |
| 31 /// | |
| 32 /// To test that a Future completes with an exception, you can use [throws] and | |
| 33 /// [throwsA]. | |
| 34 /// | |
| 35 /// [description] is an optional tag that can be used to identify the completion | |
| 36 /// matcher in error messages. | |
| 37 Matcher completion(matcher, [String description = '']) => | |
| 38 new _Completes(wrapMatcher(matcher), description); | |
| 39 | |
| 40 class _Completes extends Matcher { | |
| 41 final Matcher _matcher; | |
| 42 final String _id; | |
| 43 | |
| 44 const _Completes(this._matcher, this._id); | |
| 45 | |
| 46 bool matches(item, Map matchState) { | |
| 47 if (item is! Future) return false; | |
| 48 Invoker.current.addOutstandingCallback(); | |
| 49 | |
| 50 item.then((value) { | |
| 51 if (_matcher != null) expect(value, _matcher); | |
| 52 Invoker.current.removeOutstandingCallback(); | |
| 53 }, onError: (error, trace) { | |
| 54 if (error is TestFailure) { | |
| 55 Invoker.current.handleError(error, trace); | |
| 56 return; | |
| 57 } | |
| 58 | |
| 59 var id = _id == '' ? '' : '${_id} '; | |
| 60 var reason = 'Expected future ${id}to complete successfully, ' | |
| 61 'but it failed with ${error}'; | |
| 62 if (trace != null) { | |
| 63 var stackTrace = terseChain(trace).toString(); | |
| 64 stackTrace = ' ${stackTrace.replaceAll('\n', '\n ')}'; | |
| 65 reason = '$reason\nStack trace:\n$stackTrace'; | |
| 66 } | |
| 67 fail(reason); | |
| 68 }); | |
| 69 | |
| 70 return true; | |
| 71 } | |
| 72 | |
| 73 Description describe(Description description) { | |
| 74 if (_matcher == null) { | |
| 75 description.add('completes successfully'); | |
| 76 } else { | |
| 77 description.add('completes to a value that ').addDescriptionOf(_matcher); | |
| 78 } | |
| 79 return description; | |
| 80 } | |
| 81 } | |
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Chromium Code Reviews
Issue 955543002:
Move a bunch of src/ files into subdirectories. (Closed)
Base URL: git@github.com:dart-lang/unittest@master