LogHelperTest.java

/*
 * Copyright (c) 2002 Cunningham & Cunningham, Inc.
 * Copyright (c) 2009-2015 by Jochen Wierum & Cologne Intelligence
 *
 * This file is part of FitGoodies.
 *
 * FitGoodies is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * FitGoodies is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with FitGoodies.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.cologneintelligence.fitgoodies.log4j;

import de.cologneintelligence.fitgoodies.testsupport.FitGoodiesTestCase;
import de.cologneintelligence.fitgoodies.util.DependencyManager;
import org.apache.log4j.Appender;
import org.apache.log4j.spi.AppenderAttachable;
import org.junit.Before;
import org.junit.Test;

import java.util.Enumeration;

import static org.hamcrest.Matchers.any;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.assertThat;
import static org.mockito.Matchers.argThat;
import static org.mockito.Mockito.*;


public final class LogHelperTest extends FitGoodiesTestCase {
	private static class DummyLogger implements AppenderAttachable {
		private Appender app1;
		private Appender app2;
		private final Appender baseAppender;

		public DummyLogger(final Appender base) {
			this.baseAppender = base;
		}

		@Override
		public void addAppender(final Appender appender) {
			if (app1 == null) {
				app1 = appender;
			} else {
				app2 = appender;
			}
		}

		@Override
		public Appender getAppender(final String name) {
			if (CaptureAppender.getAppenderNameFor("R").equals(name)) {
				return app1;
			} else if (CaptureAppender.getAppenderNameFor("stderr").equals(name)) {
				return app2;
			} else {
				return baseAppender;
			}
		}

		public Appender getExpected1() {
			return app1;
		}

		public Appender getExpected2() {
			return app2;
		}

		@Override
		public Enumeration<?> getAllAppenders() {
			return null;
		}

		@Override
		public boolean isAttached(final Appender arg0) {
			return true;
		}

		@Override
		public void removeAllAppenders() {
		}

		@Override
		public void removeAppender(final String arg0) {
		}

		@Override
		public void removeAppender(final Appender arg0) {

		}
	}

	private LogHelper helper;

	@Before
	public void setUp() throws Exception {
		helper = DependencyManager.getOrCreate(LogHelper.class);
	}

	@Test
	public void testAppender() {
		final Appender baseAppender = mock(Appender.class);
		DummyLogger logger = new DummyLogger(baseAppender);

		when(baseAppender.getName()).thenReturn("BaseAppender");

		helper.addCaptureToLogger(logger, "R");
		helper.addCaptureToLogger(logger, "stderr");
		assertThat(helper.getCaptureAppender(logger, "R"), is(sameInstance(logger.getExpected1())));
		assertThat(helper.getCaptureAppender(logger, "stderr"), is(sameInstance(logger.getExpected2())));
	}

	@Test
	public void testRegister() {
		final AppenderAttachable logger = mock(AppenderAttachable.class);
		final Appender appender = mock(Appender.class);

		when(appender.getName()).thenReturn("BaseAppender3");
		when(logger.getAppender("stdout")).thenReturn(appender);

		helper.addCaptureToLogger(logger, "stdout");
		verify(logger).addAppender(argThat(any(CaptureAppender.class)));
	}

	@Test
	public void testUnregister() {
		final AppenderAttachable logger = mock(AppenderAttachable.class);

		helper.remove(logger, "R");
		verify(logger).removeAppender(CaptureAppender.getAppenderNameFor("R"));
	}

	@Test
	public void testClear() {
		final AppenderAttachable logger = mock(AppenderAttachable.class);
		final Appender appender = mock(Appender.class);

		when(appender.getName()).thenReturn("R");

		final CaptureAppender dummyAppender = CaptureAppender.newAppenderFrom(appender);

		when(logger.getAppender(CaptureAppender.getAppenderNameFor("R"))).thenReturn(dummyAppender);
		helper.clear(logger, "R");
	}
}