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Side by Side Diff: pkg/unittest/lib/src/core_matchers.dart

Issue 11361190: a === b -> identical(a, b) (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Address comments. Created 8 years, 1 month ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 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 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. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 part of matcher; 5 part of matcher;
6 6
7 /** 7 /**
8 * Returns a matcher that matches empty strings, maps or collections. 8 * Returns a matcher that matches empty strings, maps or collections.
9 */ 9 */
10 const Matcher isEmpty = const _Empty(); 10 const Matcher isEmpty = const _Empty();
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66 66
67 /** 67 /**
68 * Returns a matches that matches if the value is the same instance 68 * Returns a matches that matches if the value is the same instance
69 * as [object] (`===`). 69 * as [object] (`===`).
70 */ 70 */
71 Matcher same(expected) => new _IsSameAs(expected); 71 Matcher same(expected) => new _IsSameAs(expected);
72 72
73 class _IsSameAs extends BaseMatcher { 73 class _IsSameAs extends BaseMatcher {
74 final _expected; 74 final _expected;
75 const _IsSameAs(this._expected); 75 const _IsSameAs(this._expected);
76 bool matches(item, MatchState matchState) => item === _expected; 76 bool matches(item, MatchState matchState) => identical(item, _expected);
77 // If all types were hashable we could show a hash here. 77 // If all types were hashable we could show a hash here.
78 Description describe(Description description) => 78 Description describe(Description description) =>
79 description.add('same instance as ').addDescriptionOf(_expected); 79 description.add('same instance as ').addDescriptionOf(_expected);
80 } 80 }
81 81
82 /** 82 /**
83 * Returns a matcher that does a deep recursive match. This only works 83 * Returns a matcher that does a deep recursive match. This only works
84 * with scalars, Maps and Iterables. To handle cyclic structures a 84 * with scalars, Maps and Iterables. To handle cyclic structures a
85 * recursion depth [limit] can be provided. The default limit is 100. 85 * recursion depth [limit] can be provided. The default limit is 100.
86 */ 86 */
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711 description.add(_featureDescription).add(' ').addDescriptionOf(_matcher); 711 description.add(_featureDescription).add(' ').addDescriptionOf(_matcher);
712 712
713 Description describeMismatch(item, Description mismatchDescription, 713 Description describeMismatch(item, Description mismatchDescription,
714 MatchState matchState, bool verbose) { 714 MatchState matchState, bool verbose) {
715 mismatchDescription.add(_featureName).add(' '); 715 mismatchDescription.add(_featureName).add(' ');
716 _matcher.describeMismatch(matchState.state['feature'], mismatchDescription, 716 _matcher.describeMismatch(matchState.state['feature'], mismatchDescription,
717 matchState.state['innerState'], verbose); 717 matchState.state['innerState'], verbose);
718 return mismatchDescription; 718 return mismatchDescription;
719 } 719 }
720 } 720 }
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