log4j-core/src/test/java/org/apache/logging/log4j/core/Log4j1222Test.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.logging.log4j.core;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.TestLogger;
import org.junit.Test;

import static org.junit.Assert.assertTrue;

/**
 * Tests logging during shutdown.
 */
public class Log4j1222Test
{

	@Test
	public void homepageRendersSuccessfully()
	{
        System.setProperty("log4j.configurationFile", "log4j2-console.xml");
		Runtime.getRuntime().addShutdownHook(new ShutdownHook());
	}

	private static class ShutdownHook extends Thread {

		private static class Holder {
			private static final Logger LOGGER = LogManager.getLogger(Log4j1222Test.class);
		}

		@Override
		public void run()
		{
			super.run();
			trigger();
		}

		private void trigger() {
			Holder.LOGGER.info("Attempt to trigger");
			assertTrue("Logger is of type " + Holder.LOGGER.getClass().getName(), Holder.LOGGER instanceof TestLogger);
			if (((TestLogger) Holder.LOGGER).getEntries().size() == 0) {
				System.out.println("Logger contains no messages");
			}
			for (final String msg : ((TestLogger) Holder.LOGGER).getEntries()) {
				System.out.println(msg);
			}
		}
	}
}