modules/core/src/test/java/org/apache/ignite/testframework/MemorizingAppenderTest.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.ignite.testframework;

import java.util.List;
import org.apache.ignite.testframework.junits.logger.GridTestLog4jLogger;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.Configurator;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.apache.logging.log4j.Level.DEBUG;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasSize;
import static org.hamcrest.Matchers.is;

/**
 * Tests for {@link MemorizingAppender}.
 */
public class MemorizingAppenderTest {
    /**
     * The instance under test.
     */
    private final MemorizingAppender appender = new MemorizingAppender();

    static {
        GridTestLog4jLogger.removeAllRootLoggerAppenders();

        Configurator.setRootLevel(DEBUG);
    }

    /***/
    @Before
    public void installAppender() {
        appender.installSelfOn(MemorizingAppenderTest.class);
    }

    /***/
    @After
    public void removeAppender() {
        appender.removeSelfFrom(MemorizingAppenderTest.class);
    }

    /**
     * Tests that MemorizingAppender memorizes logging events.
     */
    @Test
    public void memorizesLoggingEvents() {
        LogManager.getLogger(MemorizingAppenderTest.class).info("Hello!");

        List<LogEvent> events = appender.events();

        assertThat(events, hasSize(1));

        LogEvent event = events.get(0);

        assertThat(event.getLevel(), is(Level.INFO));
        assertThat(event.getMessage().getFormattedMessage(), is("Hello!"));
    }
}