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Side by Side Diff: pkg/unittest/future_matchers.dart

Issue 11301046: Restructure pkg/unittest and pkg/webdriver to follow the pub conventions. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 8 years, 1 month ago
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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 /**
6 * Matches a [Future] that completes successfully with a value. Note that this
7 * creates an asynchronous expectation. The call to `expect()` that includes
8 * this will return immediately and execution will continue. Later, when the
9 * future completes, the actual expectation will run.
10 *
11 * To test that a Future completes with an exception, you can use [throws] and
12 * [throwsA].
13 */
14
15 part of unittest;
16
17 Matcher completes = const _Completes(null);
18
19 /**
20 * Matches a [Future] that completes succesfully with a value that matches
21 * [matcher]. Note that this creates an asynchronous expectation. The call to
22 * `expect()` that includes this will return immediately and execution will
23 * continue. Later, when the future completes, the actual expectation will run.
24 *
25 * To test that a Future completes with an exception, you can use [throws] and
26 * [throwsA].
27 */
28 Matcher completion(matcher) => new _Completes(wrapMatcher(matcher));
29
30 class _Completes extends BaseMatcher {
31 final Matcher _matcher;
32
33 const _Completes(this._matcher);
34
35 bool matches(item, MatchState matchState) {
36 if (item is! Future) return false;
37
38 item.onComplete(expectAsync1((future) {
39 var reason = 'Expected future to complete successfully, but it failed '
40 'with ${future.exception}';
41 if (future.stackTrace != null) {
42 var stackTrace = future.stackTrace.toString();
43 stackTrace = ' ${stackTrace.replaceAll('\n', '\n ')}';
44 reason = '$reason\nStack trace:\n$stackTrace';
45 }
46
47 expect(future.hasValue, isTrue, reason: reason);
48 if (_matcher != null) expect(future.value, _matcher);
49 }));
50
51 return true;
52 }
53
54 Description describe(Description description) {
55 if (_matcher == null) {
56 description.add('completes successfully');
57 } else {
58 description.add('completes to a value that ').addDescriptionOf(_matcher);
59 }
60 return description;
61 }
62 }
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