content: /**
   * 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.activemq.store.kahadb.disk.journal;
  
  import static org.junit.Assert.assertEquals;
  import static org.mockito.Mockito.mock;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.util.Arrays;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  
  public class DataFileAccessorTest {
  
      @Rule
      public TemporaryFolder dataDir = new TemporaryFolder();
  
      @Test
      public void testValidLocation() throws IOException {
          //Create file of size 1024
          final DataFileAccessor accessor = new DataFileAccessor(mock(Journal.class),
              newTestDataFile(1024));
  
          //The read check will add the offset and location size and will be 612
          //so should be fine as it's less than the set file size of 1024
          final Location location = new Location(0, 100);
          location.setSize(512);
  
          accessor.validateFileLength(location);
      }
  
      @Test(expected = IOException.class)
      public void testInvalidLocationSize() throws IOException {
          //Create file of size 1024
          final DataFileAccessor accessor = new DataFileAccessor(mock(Journal.class),
              newTestDataFile(1024));
  
          //Set a size that is too large so this should fail
          final Location location = new Location(0, 100);
          location.setSize(2048);
  
          accessor.validateFileLength(location);
      }
  
      @Test
      public void testValidateUsingRealFileLength() throws IOException {
          //Create file of size 1024
          final DataFile dataFile = newTestDataFile(1024);
  
          final DataFileAccessor accessor = new DataFileAccessor(mock(Journal.class), dataFile);
  
          //Set a bad length value on the dataFile so that the initial check fails
          //because the location is greater than dataFile.length
          //We should read the real file size (1024) which is greater than the
          //location size + offset so this should work
          dataFile.setLength(512);
          final Location location = new Location(0, 100);
          location.setSize(512);
  
          accessor.validateFileLength(location);
      }
  
      private DataFile newTestDataFile(int size) throws IOException {
          final DataFile dataFile = new DataFile(writeTestFile(1024), 0);
          assertEquals(1024, dataFile.length);
          return dataFile;
      }
  
      private File writeTestFile(int size) throws IOException {
          final File file = dataDir.newFile();
          final byte[] data = new byte[size];
          Arrays.fill(data, (byte)0);
          Files.write(Path.of(file.toURI()), data);
          assertEquals(1024, file.length());
          return file;
      }
  }
  