121 lines
4.1 KiB
Dart
121 lines
4.1 KiB
Dart
// Copyright 2014, the Dart project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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import 'package:flutter_test/flutter_test.dart';
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class FunctionMatcher<T> extends CustomMatcher {
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final Object Function(T value) _feature;
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FunctionMatcher(String name, this._feature, matcher)
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: super('`$name`:', '`$name`', matcher);
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@override
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Object featureValueOf(covariant T actual) => _feature(actual);
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}
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class HavingMatcher<T> implements TypeMatcher<T> {
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final TypeMatcher<T> _parent;
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final List<FunctionMatcher<T>> functionMatchers;
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HavingMatcher(TypeMatcher<T> parent, String description,
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Object Function(T) feature, dynamic matcher,
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[Iterable<FunctionMatcher<T>>? existing])
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: _parent = parent,
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functionMatchers = [
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...?existing,
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FunctionMatcher<T>(description, feature, matcher)
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];
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@override
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TypeMatcher<T> having(
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Object Function(T) feature, String description, dynamic matcher) =>
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HavingMatcher(_parent, description, feature, matcher, functionMatchers);
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@override
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bool matches(dynamic item, Map matchState) {
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for (var matcher in <Matcher>[_parent].followedBy(functionMatchers)) {
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if (!matcher.matches(item, matchState)) {
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addStateInfo(matchState, {'matcher': matcher});
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return false;
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}
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}
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return true;
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}
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@override
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Description describeMismatch(
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dynamic item,
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Description mismatchDescription,
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Map matchState,
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bool verbose,
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) {
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var matcher = matchState['matcher'] as Matcher;
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matcher.describeMismatch(
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item, mismatchDescription, matchState['state'] as Map, verbose);
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return mismatchDescription;
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}
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@override
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Description describe(Description description) => description
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.add('')
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.addDescriptionOf(_parent)
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.add(' with ')
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.addAll('', ' and ', '', functionMatchers);
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}
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class TypeMatcher<T> extends Matcher {
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const TypeMatcher();
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TypeMatcher<T> having(
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Object Function(T) feature, String description, dynamic matcher) =>
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HavingMatcher(this, description, feature, matcher);
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@override
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Description describe(Description description) {
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var name = _stripDynamic(T);
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return description.add("<Instance of '$name'>");
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}
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@override
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bool matches(Object? item, Map matchState) => item is T;
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@override
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Description describeMismatch(
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dynamic item,
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Description mismatchDescription,
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Map matchState,
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bool verbose,
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) {
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var name = _stripDynamic(T);
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return mismatchDescription.add("is not an instance of '$name'");
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}
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}
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String _stripDynamic(Type type) =>
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type.toString().replaceAll(_dart2DynamicArgs, '');
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final _dart2DynamicArgs = RegExp('<dynamic(, dynamic)*>');
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