/*
    * 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 static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.UUID;
  
  import org.apache.commons.io.TaggedIOException;
  import org.junit.jupiter.api.Test;
  
  /**
   * Tests {@link TaggedInputStream}.
   */
  public class TaggedInputStreamTest  {
  
      @Test
      public void testBrokenStream() {
          final IOException exception = new IOException("test exception");
          final TaggedInputStream stream =
              new TaggedInputStream(new BrokenInputStream(exception));
  
          // Test the available() method
          final IOException exceptionAvailable = assertThrows(IOException.class, stream::available);
          assertTrue(stream.isCauseOf(exceptionAvailable));
          final IOException exceptionAvailableCause = assertThrows(IOException.class, () -> stream.throwIfCauseOf(exceptionAvailable));
          assertEquals(exception, exceptionAvailableCause);
  
          // Test the read() method
          final IOException exceptionRead = assertThrows(IOException.class, stream::read);
          assertTrue(stream.isCauseOf(exceptionRead));
          final IOException exceptionReadCause = assertThrows(IOException.class, () -> stream.throwIfCauseOf(exceptionRead));
          assertEquals(exception, exceptionReadCause);
  
          // Test the close() method
          final IOException exceptionClose = assertThrows(IOException.class, stream::close);
          assertTrue(stream.isCauseOf(exceptionClose));
          final IOException exceptionCloseCause = assertThrows(IOException.class, () -> stream.throwIfCauseOf(exceptionClose));
          assertEquals(exception, exceptionCloseCause);
      }
  
      @Test
      public void testEmptyStream() throws IOException {
          try (InputStream stream = new TaggedInputStream(ClosedInputStream.INSTANCE)) {
              assertEquals(0, stream.available());
              assertEquals(-1, stream.read());
              assertEquals(-1, stream.read(new byte[1]));
              assertEquals(-1, stream.read(new byte[1], 0, 1));
          }
      }
  
      @Test
      public void testNormalStream() throws IOException {
          try (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());
          }
      }
  
      @Test
      public void testOtherException() throws Exception {
          final IOException exception = new IOException("test exception");
          try (TaggedInputStream stream = new TaggedInputStream(ClosedInputStream.INSTANCE)) {
  
              assertFalse(stream.isCauseOf(exception));
              assertFalse(stream.isCauseOf(new TaggedIOException(exception, UUID.randomUUID())));
  
              stream.throwIfCauseOf(exception);
  
              stream.throwIfCauseOf(new TaggedIOException(exception, UUID.randomUUID()));
          }
      }
  
 }