/*
    * 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
    *
   *   https://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.bzip2;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.BufferedOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.Writer;
  import java.nio.charset.StandardCharsets;
  import java.nio.file.Files;
  import java.nio.file.Path;
  
  import org.apache.commons.io.IOUtils;
  import org.junit.jupiter.api.io.TempDir;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.ValueSource;
  
  /**
   * Tests COMPRESS-686.
   */
  class Compress686Test {
  
      @TempDir
      private Path tempDir;
  
      private Path compressFile(final Path file, final boolean bufferOutput) throws IOException {
          final Path newFile = tempDir.resolve(file.getFileName().toString() + ".bz2");
          try (InputStream in = Files.newInputStream(file);
                  BZip2CompressorOutputStream bzOut = new BZip2CompressorOutputStream(newOutputStream(newFile, bufferOutput))) {
              IOUtils.copy(in, bzOut);
          }
          return newFile;
      }
  
      private Path decompressBzip2File(final Path file) throws IOException {
          final Path decompressedFile = file.resolveSibling(file.getFileName().toString() + ".decompressed");
          try (BZip2CompressorInputStream bzIn = new BZip2CompressorInputStream(Files.newInputStream(file));
                  OutputStream outputStream = Files.newOutputStream(decompressedFile)) {
              IOUtils.copy(bzIn, outputStream);
          }
          return decompressedFile;
      }
  
      private OutputStream newOutputStream(final Path newFile, final boolean bufferOutput) throws IOException {
          final OutputStream outputStream = Files.newOutputStream(newFile);
          return bufferOutput ? new BufferedOutputStream(outputStream) : outputStream;
      }
  
      @ParameterizedTest
      @ValueSource(booleans = { true, false })
      void testRoundtrip(final boolean bufferCompressOutput) throws Exception {
          final Path file = tempDir.resolve("test.txt");
          final String contents = "a";
          try (Writer w = Files.newBufferedWriter(file, StandardCharsets.UTF_8)) {
              IOUtils.write(contents, w);
          }
          final Path compressedFile = compressFile(file, bufferCompressOutput);
          decompressBzip2File(compressedFile);
          assertEquals(contents, IOUtils.toString(file.toUri(), StandardCharsets.UTF_8));
      }
  }