org.dmfs.jems.hamcrest.matchers.LambdaMatcher Maven / Gradle / Ivy
/*
* Copyright 2019 dmfs GmbH
*
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.dmfs.jems.hamcrest.matchers;
import org.dmfs.jems.function.Function;
import org.hamcrest.FeatureMatcher;
import org.hamcrest.Matcher;
/**
* A version of a {@link FeatureMatcher} which takes a delegate {@link Function} instead of requiring to override it.
*
* @author Marten Gajda
*/
public final class LambdaMatcher extends FeatureMatcher
{
private final Function mFunction;
public static Matcher having(String name, Function function, Matcher subMatcher)
{
return new LambdaMatcher<>(function, subMatcher, name, name);
}
public static Matcher having(Function function, Matcher subMatcher)
{
return new LambdaMatcher<>(function, subMatcher, "unnamed feature", "unnamed feature");
}
public LambdaMatcher(Function function, Matcher subMatcher, String featureDescription, String featureName)
{
super(subMatcher, featureDescription, featureName);
mFunction = function;
}
@Override
protected Feature featureValueOf(Testee actual)
{
return mFunction.value(actual);
}
}