/*
    * 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.utils;
  
  import static org.junit.Assert.assertArrayEquals;
  import static org.junit.Assert.assertEquals;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  
  import org.junit.Test;
  
  public class CountingStreamTest {
  
      @Test
      public void output() throws Exception {
          // I don't like "test all at once" tests either, but the class
          // is so trivial
          ByteArrayOutputStream bos = new ByteArrayOutputStream();
          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());
          o.close();
          assertArrayEquals(new byte[] { 1, 2, 3, 4 }, bos.toByteArray());
      }
  
      @Test
      public void input() throws Exception {
          // I don't like "test all at once" tests either, but the class
          // is so trivial
          ByteArrayInputStream bis =
              new ByteArrayInputStream(new byte[] { 1, 2, 3, 4 });
          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());
          i.close();
      }
  
  }