| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| /** |
| * The mirror matchers library provides some additional matchers that |
| * make use of dart:mirrors. |
| * |
| * ## Installing ## |
| * |
| * Use [pub][] to install this package. Add the following to your `pubspec.yaml` |
| * file. |
| * |
| * dependencies: |
| * unittest: any |
| * |
| * Then run `pub install`. |
| * |
| * Import this into your Dart code with: |
| * |
| * import 'package:unittest/mirror_matchers.dart'; |
| * |
| * For more information, see the [unittest package on pub.dartlang.org]. |
| * (http://pub.dartlang.org/packages/unittest). |
| * |
| * [pub]: http://pub.dartlang.org |
| * [pkg]: http://pub.dartlang.org/packages/mirror_matchers |
| */ |
| library mirror_matchers; |
| |
| import 'dart:mirrors'; |
| |
| import 'matcher.dart'; |
| |
| /** |
| * Returns a matcher that checks if a class instance has a property |
| * with name [name], and optionally, if that property in turn satisfies |
| * a [matcher]. |
| */ |
| Matcher hasProperty(String name, [matcher]) => |
| new _HasProperty(name, matcher == null ? null : wrapMatcher(matcher)); |
| |
| class _HasProperty extends Matcher { |
| final String _name; |
| final Matcher _matcher; |
| |
| const _HasProperty(this._name, [this._matcher]); |
| |
| bool matches(item, Map matchState) { |
| var mirror = reflect(item); |
| var classMirror = mirror.type; |
| var symbol = new Symbol(_name); |
| if (!classMirror.getters.containsKey(symbol)) { |
| addStateInfo(matchState, {'reason': 'has no property named "$_name"'}); |
| return false; |
| } |
| if (_matcher == null) return true; |
| var result = mirror.getField(symbol); |
| var resultMatches = _matcher.matches(result.reflectee, matchState); |
| if (!resultMatches) { |
| addStateInfo(matchState, {'value': result.reflectee}); |
| } |
| return resultMatches; |
| } |
| |
| Description describe(Description description) { |
| description.add('has property "$_name"'); |
| if (_matcher != null) { |
| description.add(' which matches ').addDescriptionOf(_matcher); |
| } |
| return description; |
| } |
| |
| Description describeMismatch(item, Description mismatchDescription, |
| Map matchState, bool verbose) { |
| var reason = matchState == null ? null : matchState['reason']; |
| if (reason != null) { |
| mismatchDescription.add(reason); |
| } else { |
| mismatchDescription.add('has property "$_name" with value '). |
| addDescriptionOf(matchState['value']); |
| var innerDescription = new StringDescription(); |
| _matcher.describeMismatch(matchState['value'], innerDescription, |
| matchState['state'], verbose); |
| if (innerDescription.length > 0) { |
| mismatchDescription.add(' which ').add(innerDescription.toString()); |
| } |
| } |
| return mismatchDescription; |
| } |
| } |