/*
    * 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.utils;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  
  import org.junit.jupiter.api.Test;
  
  class CountingStreamTest {
  
      @Test
      void testInput() throws Exception {
          // I don't like "test all at once" tests either, but the class
          // is so trivial
          final ByteArrayInputStream bis = new ByteArrayInputStream(new byte[] { 1, 2, 3, 4 });
          try (CountingInputStream i = new CountingInputStream(bis)) {
              assertEquals(1, i.read());
              assertEquals(1, i.getBytesRead());
              byte[] b = new byte[2];
              i.read(b);
              assertEquals(3, i.getBytesRead());
              assertArrayEquals(new byte[] { 2, 3 }, b);
              b = new byte[3];
              i.read(b, 1, 1);
              assertArrayEquals(new byte[] { 0, 4, 0 }, b);
              assertEquals(4, i.getBytesRead());
              i.count(-1);
              assertEquals(4, i.getBytesRead());
              i.count(-2);
              assertEquals(2, i.getBytesRead());
          }
      }
  
      @Test
      void testOutput() throws Exception {
          // I don't like "test all at once" tests either, but the class
          // is so trivial
          final ByteArrayOutputStream bos = new ByteArrayOutputStream();
          try (CountingOutputStream o = new CountingOutputStream(bos)) {
              o.write(1);
              assertEquals(1, o.getBytesWritten());
              o.write(new byte[] { 2, 3 });
              assertEquals(3, o.getBytesWritten());
              o.write(new byte[] { 2, 3, 4, 5, }, 2, 1);
              assertEquals(4, o.getBytesWritten());
              o.count(-1);
              assertEquals(4, o.getBytesWritten());
              o.count(-2);
              assertEquals(2, o.getBytesWritten());
          }
          assertArrayEquals(new byte[] { 1, 2, 3, 4 }, bos.toByteArray());
      }
  
  }