/*
    * 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.pack200;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.io.output.NullOutputStream;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests <a href="https://issues.apache.org/jira/browse/COMPRESS-687">COMPRESS-687</a>.
   */
  class Compress687Test {
  
      private static final String FIXTURE = "org/apache/commons/compress/COMPRESS-687/test-issue.7z";
      private static final int BUFFER_SIZE = 16_384;
  
      @Test
      void testTransferTo() throws Exception {
          try (InputStream inputStream = Compress687Test.class.getClassLoader().getResourceAsStream(FIXTURE);
                  Pack200CompressorInputStream compressInputStream = new Pack200CompressorInputStream(inputStream)) {
              transferTo(compressInputStream, NullOutputStream.INSTANCE);
          }
          try (InputStream inputStream = Compress687Test.class.getClassLoader().getResourceAsStream(FIXTURE);
                  Pack200CompressorInputStream compressInputStream = new Pack200CompressorInputStream(inputStream)) {
              IOUtils.copy(compressInputStream, NullOutputStream.INSTANCE);
          }
          if (Boolean.getBoolean("Compress687Test.sysout")) {
              System.out.println("Done.");
          }
      }
  
      private long transferTo(final InputStream in, final OutputStream out) throws IOException {
          long transferred = 0;
          final byte[] buffer = new byte[BUFFER_SIZE];
          int read;
          while ((read = in.read(buffer, 0, BUFFER_SIZE)) >= 0) {
              out.write(buffer, 0, read);
              if (transferred < Long.MAX_VALUE) {
                  try {
                      transferred = Math.addExact(transferred, read);
                  } catch (final ArithmeticException ignore) {
                      transferred = Long.MAX_VALUE;
                  }
              }
          }
          return transferred;
      }
  }