| // 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. |
| |
| import 'package:test/test.dart'; |
| |
| /// Returns a matcher that runs [matcher] against a [Frame]'s `member` field. |
| Matcher frameMember(matcher) => |
| transform((frame) => frame.member, matcher, 'member'); |
| |
| /// Returns a matcher that runs [matcher] against a [Frame]'s `library` field. |
| Matcher frameLibrary(matcher) => |
| transform((frame) => frame.library, matcher, 'library'); |
| |
| /// Returns a matcher that runs [transformation] on its input, then matches |
| /// the output against [matcher]. |
| /// |
| /// [description] should be a noun phrase that describes the relation of the |
| /// output of [transformation] to its input. |
| Matcher transform(transformation(value), matcher, String description) => |
| new _TransformMatcher(transformation, wrapMatcher(matcher), description); |
| |
| class _TransformMatcher extends Matcher { |
| final Function _transformation; |
| final Matcher _matcher; |
| final String _description; |
| |
| _TransformMatcher(this._transformation, this._matcher, this._description); |
| |
| bool matches(item, Map matchState) => |
| _matcher.matches(_transformation(item), matchState); |
| |
| Description describe(Description description) => |
| description.add(_description).add(' ').addDescriptionOf(_matcher); |
| } |