/*
 * 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.appender.rolling;

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.apache.logging.log4j.core.appender.RollingFileAppender;
import org.apache.logging.log4j.junit.CleanFolders;
import org.apache.logging.log4j.junit.LoggerContextRule;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;

/**
 * Test LOG4J2-2485.
 */
public class RollingAppenderDirectWriteStartupSizeTest {

  private static final String CONFIG = "log4j-rolling-direct-startup-size.xml";

  private static final String DIR = "target/rolling-direct-startup-size";

  private static final String FILE = "size-test.log";

  private static final String MESSAGE = "test message";

  @Rule
  public LoggerContextRule loggerContextRule = LoggerContextRule
      .createShutdownTimeoutLoggerContextRule(CONFIG);

  @Rule
  public CleanFolders cleanFolders = new CleanFolders(false, true, 10, DIR);

  @BeforeClass
  public static void beforeClass() throws Exception {
    Path log = Paths.get(DIR, FILE);
    if (Files.exists(log)) {
        Files.delete(log);
    }

    Files.createDirectories(log.getParent());
    Files.createFile(log);
    Files.write(log, MESSAGE.getBytes());
  }

  @Test
  public void testRollingFileAppenderWithReconfigure() throws Exception {
    final RollingFileAppender rfAppender = loggerContextRule.getRequiredAppender("RollingFile",
        RollingFileAppender.class);
    final RollingFileManager manager = rfAppender.getManager();

    Assert.assertNotNull(manager);
    Assert.assertEquals("Existing file size not preserved on startup", MESSAGE.getBytes().length, manager.size);
  }
}