com.lyncode.test.matchers.extractor.MatcherExtractor Maven / Gradle / Ivy

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/**
 * Copyright 2012 Lyncode
 *
 * 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.lyncode.test.matchers.extractor;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

public class MatcherExtractor extends TypeSafeMatcher {
    public static  MatcherExtractor valueOf (ExtractFunction extractFunction, Matcher matcher) {
        return new MatcherExtractor(matcher, extractFunction);
    }

    private Matcher matcher;
    private ExtractFunction extractor;

    public MatcherExtractor(Matcher matcher, ExtractFunction extractor) {
        this.matcher = matcher;
        this.extractor = extractor;
    }

    @Override
    protected boolean matchesSafely(V item) {
        return matcher.matches(extractor.apply(item));
    }

    @Override
    public void describeTo(Description description) {
        description.appendDescriptionOf(extractor).appendText(" ").appendDescriptionOf(matcher);
    }

    @Override
    protected void describeMismatchSafely(V item, Description mismatchDescription) {
        mismatchDescription.appendText("was ").appendValue(extractor.apply(item));
    }
}