nweiz@google.com
35dc712dd5
This class uses zones to track stack traces across asynchronous boundaries. It will aid considerably in debugging errors in heavily-asynchronous programs. R=floitsch@google.com, rnystrom@google.com BUG=7040 Review URL: https://codereview.chromium.org//75863004 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@30738 260f80e4-7a28-3924-810f-c04153c831b5
38 lines
1.4 KiB
Dart
38 lines
1.4 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library stack_trace.test.utils;
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import 'package:unittest/unittest.dart';
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/// Returns a matcher that runs [matcher] against a [Frame]'s `member` field.
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Matcher frameMember(matcher) =>
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transform((frame) => frame.member, matcher, 'member');
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/// Returns a matcher that runs [matcher] against a [Frame]'s `library` field.
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Matcher frameLibrary(matcher) =>
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transform((frame) => frame.library, matcher, 'library');
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/// Returns a matcher that runs [transformation] on its input, then matches
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/// the output against [matcher].
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///
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/// [description] should be a noun phrase that describes the relation of the
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/// output of [transformation] to its input.
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Matcher transform(transformation(value), matcher, String description) =>
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new _TransformMatcher(transformation, wrapMatcher(matcher), description);
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class _TransformMatcher extends Matcher {
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final Function _transformation;
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final Matcher _matcher;
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final String _description;
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_TransformMatcher(this._transformation, this._matcher, this._description);
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bool matches(item, Map matchState) =>
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_matcher.matches(_transformation(item), matchState);
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Description describe(Description description) =>
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description.add(_description).add(' ').addDescriptionOf(_matcher);
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}
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