/*
 * Copyright 2012-2017 the original author or authors.
 *
 * 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.springframework.boot.test.web.reactive;

import java.util.List;

import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.core.annotation.AnnotatedElementUtils;
import org.springframework.test.context.ContextConfigurationAttributes;
import org.springframework.test.context.ContextCustomizer;
import org.springframework.test.context.ContextCustomizerFactory;
import org.springframework.util.ClassUtils;

/**
 * {@link ContextCustomizerFactory} for {@code WebTestClient}.
 *
 * @author Stephane Nicoll
 */
public class WebTestClientContextCustomizerFactory implements ContextCustomizerFactory {

	private static final String WEB_TEST_CLIENT_CLASS = "org.springframework.web.reactive.function.client.WebClient";

	@Override
	public ContextCustomizer createContextCustomizer(Class<?> testClass,
			List<ContextConfigurationAttributes> configAttributes) {
		if (isWebClientPresent() && AnnotatedElementUtils.findMergedAnnotation(testClass,
				SpringBootTest.class) != null) {
			return new WebTestClientContextCustomizer();
		}
		return null;
	}

	private boolean isWebClientPresent() {
		return ClassUtils.isPresent(WEB_TEST_CLIENT_CLASS, getClass().getClassLoader());
	}

}
