/*
    * 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.io.input;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.UUID;
  
  import junit.framework.TestCase;
  
  import org.apache.commons.io.TaggedIOException;
  
  /**
   * JUnit Test Case for {@link TaggedInputStream}.
   */
  public class TaggedInputStreamTest extends TestCase {
  
      public void testEmptyStream() {
          try {
              final InputStream stream = new TaggedInputStream(new ClosedInputStream());
              assertEquals(0, stream.available());
              assertEquals(-1, stream.read());
              assertEquals(-1, stream.read(new byte[1]));
              assertEquals(-1, stream.read(new byte[1], 0, 1));
              stream.close();
          } catch (final IOException e) {
              fail("Unexpected exception thrown");
          }
      }
  
      public void testNormalStream() {
          try {
              final InputStream stream = new TaggedInputStream(
                      new ByteArrayInputStream(new byte[] { 'a', 'b', 'c' }));
              assertEquals(3, stream.available());
              assertEquals('a', stream.read());
              final byte[] buffer = new byte[1];
              assertEquals(1, stream.read(buffer));
              assertEquals('b', buffer[0]);
              assertEquals(1, stream.read(buffer, 0, 1));
              assertEquals('c', buffer[0]);
              assertEquals(-1, stream.read());
              stream.close();
          } catch (final IOException e) {
              fail("Unexpected exception thrown");
          }
      }
  
      public void testBrokenStream() {
          final IOException exception = new IOException("test exception");
          final TaggedInputStream stream =
              new TaggedInputStream(new BrokenInputStream(exception));
  
          // Test the available() method
          try {
              stream.available();
              fail("Expected exception not thrown.");
          } catch (final IOException e) {
              assertTrue(stream.isCauseOf(e));
              try {
                  stream.throwIfCauseOf(e);
                  fail("Expected exception not thrown.");
              } catch (final IOException e2) {
                  assertEquals(exception, e2);
              }
          }
  
          // Test the read() method
          try {
              stream.read();
              fail("Expected exception not thrown.");
          } catch (final IOException e) {
              assertTrue(stream.isCauseOf(e));
              try {
                  stream.throwIfCauseOf(e);
                  fail("Expected exception not thrown.");
              } catch (final IOException e2) {
                  assertEquals(exception, e2);
              }
          }
  
          // Test the close() method
          try {
              stream.close();
             fail("Expected exception not thrown.");
         } catch (final IOException e) {
             assertTrue(stream.isCauseOf(e));
             try {
                 stream.throwIfCauseOf(e);
                 fail("Expected exception not thrown.");
             } catch (final IOException e2) {
                 assertEquals(exception, e2);
             }
         }
     }
 
     public void testOtherException() throws Exception {
         final IOException exception = new IOException("test exception");
         final InputStream closed = new ClosedInputStream();
         final TaggedInputStream stream = new TaggedInputStream(closed);
 
         assertFalse(stream.isCauseOf(exception));
         assertFalse(stream.isCauseOf(
                 new TaggedIOException(exception, UUID.randomUUID())));
 
         try {
             stream.throwIfCauseOf(exception);
         } catch (final IOException e) {
             fail("Unexpected exception thrown");
         }
 
         try {
             stream.throwIfCauseOf(
                     new TaggedIOException(exception, UUID.randomUUID()));
         } catch (final IOException e) {
             fail("Unexpected exception thrown");
         }
         stream.close();
     }
 
 }