log4j-core/src/test/java/org/apache/logging/log4j/core/config/CustomConfigurationTest.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.config;

import java.io.File;
import java.io.Serializable;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.Layout;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.appender.FileAppender;
import org.apache.logging.log4j.core.config.xml.XmlConfiguration;
import org.apache.logging.log4j.core.layout.PatternLayout;
import org.apache.logging.log4j.junit.LoggerContextRule;
import org.apache.logging.log4j.status.StatusConsoleListener;
import org.apache.logging.log4j.status.StatusListener;
import org.apache.logging.log4j.status.StatusLogger;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;

import static org.apache.logging.log4j.hamcrest.FileMatchers.exists;
import static org.apache.logging.log4j.hamcrest.FileMatchers.hasLength;
import static org.hamcrest.Matchers.greaterThan;
import static org.hamcrest.Matchers.instanceOf;
import static org.junit.Assert.*;

/**
 *
 */
public class CustomConfigurationTest {

    public static final String LOG_FILE = "target/test.log";

    @BeforeClass
    public static void before() {
        System.setProperty("log4j.level", "info");
        System.setProperty("log.level", "info");
    }

    @Rule
    public LoggerContextRule init = new LoggerContextRule("log4j-props.xml");

    @Before
    public void setUp() throws Exception {
        new File(LOG_FILE).delete();
    }

    @Test
    public void testConfig() {
        // don't bother using "error" since that's the default; try another level
        final LoggerContext ctx = this.init.getLoggerContext();
        ctx.reconfigure();
        final Configuration config = ctx.getConfiguration();
        assertThat(config, instanceOf(XmlConfiguration.class));
        for (final StatusListener listener : StatusLogger.getLogger().getListeners()) {
            if (listener instanceof StatusConsoleListener) {
                assertSame(listener.getStatusLevel(), Level.INFO);
                break;
            }
        }
        final Layout<? extends Serializable> layout = PatternLayout.newBuilder()
            .withPattern(PatternLayout.SIMPLE_CONVERSION_PATTERN)
            .withConfiguration(config)
            .build();
        // @formatter:off
        final FileAppender appender = FileAppender.newBuilder()
            .withFileName(LOG_FILE)
            .withAppend(false)
            .withName("File")
            .withIgnoreExceptions(false)
            .withBufferSize(4000)
            .withBufferedIo(false)
            .withLayout(layout)
            .build();
        // @formatter:on
        appender.start();
        config.addAppender(appender);
        final AppenderRef ref = AppenderRef.createAppenderRef("File", null, null);
        final AppenderRef[] refs = new AppenderRef[] {ref};

        final LoggerConfig loggerConfig = LoggerConfig.createLogger(false, Level.INFO, "org.apache.logging.log4j",
            "true", refs, null, config, null );
        loggerConfig.addAppender(appender, null, null);
        config.addLogger("org.apache.logging.log4j", loggerConfig);
        ctx.updateLoggers();
        final Logger logger = ctx.getLogger(CustomConfigurationTest.class.getName());
        logger.info("This is a test");
        final File file = new File(LOG_FILE);
        assertThat(file, exists());
        assertThat(file, hasLength(greaterThan(0L)));
    }
}