/*
* Copyright 2014 Ben Manes. All Rights Reserved.
*
* 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 com.github.benmanes.caffeine.testing;
import java.util.concurrent.Future;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeDiagnosingMatcher;
import org.hamcrest.core.Is;
import com.google.common.util.concurrent.Futures;
/**
* A matcher that unwraps a future and forwards evaluation to another matcher.
*
* @author ben.manes@gmail.com (Ben Manes)
*/
public final class IsFutureValue<V> extends TypeSafeDiagnosingMatcher<Future<V>> {
final Matcher<V> matcher;
IsFutureValue(Matcher<V> matcher) {
this.matcher = matcher;
}
@Override
public void describeTo(Description description) {
matcher.describeTo(description);
}
@Override
protected boolean matchesSafely(Future<V> future, Description description) {
return matcher.matches(Futures.getUnchecked(future));
}
public static <V> IsFutureValue<V> future(Matcher<V> matcher) {
return new IsFutureValue<>(matcher);
}
public static <V> IsFutureValue<V> futureOf(V value) {
return new IsFutureValue<>(Is.is(value));
}
}