/*
    * 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.commons.compress.compressors.xz;
  
  import static org.apache.commons.compress.AbstractTest.getFile;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.file.Files;
  
  import org.apache.commons.io.IOUtils;
  import org.junit.jupiter.api.Test;
  
  public class XZCompressorInputStreamTest {
      private void multiByteReadConsistentlyReturnsMinusOneAtEof(final boolean decompressConcatenated) throws IOException {
          final File input = getFile("bla.tar.xz");
          final byte[] buf = new byte[2];
          try (InputStream is = Files.newInputStream(input.toPath());
                  XZCompressorInputStream in = new XZCompressorInputStream(is, decompressConcatenated);) {
              IOUtils.toByteArray(in);
              assertEquals(-1, in.read(buf));
              assertEquals(-1, in.read(buf));
          }
      }
  
      private void singleByteReadConsistentlyReturnsMinusOneAtEof(final boolean decompressConcatenated) throws IOException {
          final File input = getFile("bla.tar.xz");
          try (InputStream is = Files.newInputStream(input.toPath());
                  XZCompressorInputStream in = new XZCompressorInputStream(is, decompressConcatenated)) {
              IOUtils.toByteArray(in);
              assertEquals(-1, in.read());
              assertEquals(-1, in.read());
          }
      }
  
      @Test
      public void testMultiByteReadConsistentlyReturnsMinusOneAtEofDecompressConcatenated() throws IOException {
          multiByteReadConsistentlyReturnsMinusOneAtEof(true);
      }
  
      @Test
      public void testMultiByteReadConsistentlyReturnsMinusOneAtEofNoDecompressConcatenated() throws IOException {
          multiByteReadConsistentlyReturnsMinusOneAtEof(false);
      }
  
      @Test
      public void testRedundantTestOfAlmostDeprecatedMatchesMethod() {
          final byte[] data = { (byte) 0xFD, '7', 'z', 'X', 'Z', '\0' };
          assertFalse(XZCompressorInputStream.matches(data, 5));
          assertTrue(XZCompressorInputStream.matches(data, 6));
          assertTrue(XZCompressorInputStream.matches(data, 7));
          data[5] = '0';
          assertFalse(XZCompressorInputStream.matches(data, 6));
      }
  
      @Test
      public void testSingleByteReadConsistentlyReturnsMinusOneAtEofDecompressConcatenated() throws IOException {
          singleByteReadConsistentlyReturnsMinusOneAtEof(true);
      }
  
      @Test
      public void testSingleByteReadConsistentlyReturnsMinusOneAtEofNoDecompressConcatenated() throws IOException {
          singleByteReadConsistentlyReturnsMinusOneAtEof(false);
      }
  
  }