/*
 * 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.context;

import java.util.Set;

import org.springframework.test.context.TestExecutionListener;

/**
 * Callback interface trigger from {@link SpringBootTestContextBootstrapper} that can be
 * used to post-process the list of default {@link TestExecutionListener} classes to be
 * used by a test. Can be used to add or remove existing listener classes.
 *
 * @author Phillip Webb
 * @since 1.4.1
 * @see SpringBootTest
 */
@FunctionalInterface
public interface DefaultTestExecutionListenersPostProcessor {

	/**
	 * Post process the list of default {@link TestExecutionListener} classes to be used.
	 * @param listeners the source listeners
	 * @return the actual listeners that should be used
	 */
	Set<Class<? extends TestExecutionListener>> postProcessDefaultTestExecutionListeners(
			Set<Class<? extends TestExecutionListener>> listeners);

}
