Index: mojo/public/dart/third_party/matcher/lib/mirror_matchers.dart |
diff --git a/mojo/public/dart/third_party/matcher/lib/mirror_matchers.dart b/mojo/public/dart/third_party/matcher/lib/mirror_matchers.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d24483199e2d3ab4fb5e8523e5eb7c8308c8f18d |
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+++ b/mojo/public/dart/third_party/matcher/lib/mirror_matchers.dart |
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+// Copyright (c) 2014, 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`. |
+library matcher.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); |
+ var candidate = classMirror.declarations[symbol]; |
+ if (candidate == null) { |
+ addStateInfo(matchState, {'reason': 'has no property named "$_name"'}); |
+ return false; |
+ } |
+ bool isInstanceField = candidate is VariableMirror && !candidate.isStatic; |
+ bool isInstanceGetter = |
+ candidate is MethodMirror && candidate.isGetter && !candidate.isStatic; |
+ if (!(isInstanceField || isInstanceGetter)) { |
+ addStateInfo(matchState, { |
+ 'reason': |
+ 'has a member named "$_name", but it is not an instance property' |
+ }); |
+ 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; |
+ } |
+} |