log4j-core/src/test/java/org/apache/logging/log4j/core/pattern/MaxLengthConverterTest.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.pattern;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.impl.Log4jLogEvent;
import org.apache.logging.log4j.message.Message;
import org.apache.logging.log4j.message.SimpleMessage;
import org.junit.Test;

import static org.junit.Assert.*;

/**
 *
 */
public class MaxLengthConverterTest {

    private static MaxLengthConverter converter = MaxLengthConverter.newInstance(null, new String[]{"%m", "10"});

    @Test
    public void testUnderMaxLength() throws Exception {
        final Message message = new SimpleMessage("0123456789");
        final LogEvent event = Log4jLogEvent.newBuilder()
            .setLoggerName("MyLogger")
            .setLevel(Level.DEBUG)
            .setMessage(message)
            .build();
        final StringBuilder sb = new StringBuilder();
        converter.format(event, sb);
        assertEquals("0123456789", sb.toString());
    }

    @Test
    public void testOverMaxLength() throws Exception {
        final Message message = new SimpleMessage("01234567890123456789");
        final LogEvent event = Log4jLogEvent.newBuilder()
            .setLoggerName("MyLogger")
            .setLevel(Level.DEBUG)
            .setMessage(message)
            .build();
        final StringBuilder sb = new StringBuilder();
        converter.format(event, sb);
        assertEquals("0123456789", sb.toString());
    }
    @Test
    public void testOverMaxLength21WithEllipsis() throws Exception {
        final Message message = new SimpleMessage("012345678901234567890123456789");
        final LogEvent event = Log4jLogEvent.newBuilder()
            .setLoggerName("MyLogger")
            .setLevel(Level.DEBUG)
            .setMessage(message)
            .build();
        final StringBuilder sb = new StringBuilder();
        MaxLengthConverter.newInstance(null, new String[]{"%m", "21"}).format(event, sb);
        assertEquals("012345678901234567890...", sb.toString());
    }
}