/*
    * 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.z;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  import java.io.ByteArrayInputStream;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.SequenceInputStream;
  import java.nio.file.Files;
  import java.util.Collections;
  import java.util.stream.IntStream;
  import java.util.stream.Stream;
  
  import org.apache.commons.compress.AbstractTest;
  import org.apache.commons.io.IOUtils;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests for class {@link ZCompressorInputStream}.
   *
   * @see ZCompressorInputStream
   */
  class ZCompressorInputStreamTest {
  
      @Test
      void testFailsToCreateZCompressorInputStreamAndThrowsIOException() throws IOException {
          try (SequenceInputStream sequenceInputStream = new SequenceInputStream(Collections.emptyEnumeration())) {
              assertThrows(IOException.class, () -> new ZCompressorInputStream(sequenceInputStream));
          }
      }
  
      @Test
      void testInvalidMaxCodeSize() throws IOException {
          final byte[] bytes = AbstractTest.readAllBytes("bla.tar.Z");
  
          // @formatter:off
          final IntStream[] invalid = {
              IntStream.range(Byte.MIN_VALUE, -120),
              IntStream.range(-97, -88),
              IntStream.range(-65, -56),
              IntStream.range(-33, -24),
              IntStream.range(-1, 8),
              IntStream.range(31, 40),
              IntStream.range(63, 72),
              IntStream.range(95, 104),
              IntStream.range(127, 127)
              };
          // @formatter:on
  
          Stream.of(invalid).forEach(ints -> ints.forEach(i -> {
              bytes[2] = (byte) i;
              assertThrows(IllegalArgumentException.class, () -> new ZCompressorInputStream(new ByteArrayInputStream(bytes), 1024 * 1024), () -> "value=" + i);
          }));
      }
  
      @Test
      void testMultiByteReadConsistentlyReturnsMinusOneAtEof() throws IOException {
          final File input = AbstractTest.getFile("bla.tar.Z");
          final byte[] buf = new byte[2];
          try (InputStream is = Files.newInputStream(input.toPath());
                  ZCompressorInputStream in = new ZCompressorInputStream(is)) {
              IOUtils.toByteArray(in);
              assertEquals(-1, in.read(buf));
              assertEquals(-1, in.read(buf));
          }
      }
  
      @Test
      void testSingleByteReadConsistentlyReturnsMinusOneAtEof() throws IOException {
          final File input = AbstractTest.getFile("bla.tar.Z");
          try (InputStream is = Files.newInputStream(input.toPath());
                  ZCompressorInputStream in = new ZCompressorInputStream(is)) {
              IOUtils.toByteArray(in);
              assertEquals(-1, in.read());
              assertEquals(-1, in.read());
          }
      }
  
  }