/*
* 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.slf4j;
import java.util.Arrays;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Tests LOG4J2-1688 Multiple loggings of arguments are setting these arguments to null.
*/
public class Log4j2Jira1688Test {
@Test
public void testLog4j2() {
// Argument-array creation
final int limit = 37;
final Object[] args = createArray(limit);
final Object[] originalArgs = Arrays.copyOf(args, args.length);
System.out.println("args " + Arrays.toString(args));
// Logger definition
final String someFormat = "test {}";
final Logger logger = LoggerFactory.getLogger(this.getClass());
// First logging of args
logger.error(someFormat, args); // Only the first element (args[0]) of args will be logged - why?
// GG: because the pattern {} picks up the 1 st argument, not the whole array
Assert.assertArrayEquals(originalArgs, args);
System.out.println("args are still ok: " + Arrays.toString(args));
// Bug: The second logging of args sets all elements of args to null
logger.error(someFormat, args);
// GG: All is well args is still intact
System.out.println("args " + Arrays.toString(args));
Assert.assertArrayEquals(originalArgs, args);
}
/**
* @param size
* @return
*/
private static Object[] createArray(final int size) {
final Object[] args = new Object[size];
for (int i = 0; i < args.length; i++) {
args[i] = i;
}
return args;
}
}