/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.http.impl.io;
  
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  
  import org.apache.hc.core5.http.StreamClosedException;
  import org.apache.hc.core5.http.io.SessionOutputBuffer;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Unit tests for {@link IdentityOutputStream}.
   */
  public class TestIdentityOutputStream {
  
      @Test
      public void testBasics() throws Exception {
          final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
          final SessionOutputBuffer outbuffer = new SessionOutputBufferImpl(16);
          final OutputStream out = new IdentityOutputStream(outbuffer, outputStream);
  
          final byte[] tmp = new byte[10];
          out.write(tmp, 0, 10);
          out.write(tmp);
          out.write(1);
          out.flush();
          out.close();
          final byte[] data = outputStream.toByteArray();
          Assert.assertEquals(21, data.length);
      }
  
      @Test
      public void testClose() throws Exception {
          final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
          final SessionOutputBuffer outbuffer = new SessionOutputBufferImpl(16);
          final OutputStream out = new IdentityOutputStream(outbuffer, outputStream);
          out.close();
          out.close();
          final byte[] tmp = new byte[10];
          try {
              out.write(tmp);
              Assert.fail("IOException should have been thrown");
          } catch (final IOException ex) {
              // expected
          }
          try {
              out.write(1);
              Assert.fail("IOException should have been thrown");
          } catch (final IOException ex) {
              // expected
          }
      }
  
      @Test
      public void testBasicWrite() throws Exception {
          final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
          final SessionOutputBuffer outbuffer = new SessionOutputBufferImpl(16);
          final OutputStream out = new IdentityOutputStream(outbuffer, outputStream);
          out.write(new byte[] {'a', 'b'}, 0, 2);
          out.write('c');
          out.flush();
  
          final byte[] input = outputStream.toByteArray();
  
          Assert.assertNotNull(input);
          final byte[] expected = new byte[] {'a', 'b', 'c'};
          Assert.assertEquals(expected.length, input.length);
          for (int i = 0; i < expected.length; i++) {
              Assert.assertEquals(expected[i], input[i]);
          }
          out.close();
     }
 
     @Test
     public void testClosedCondition() throws Exception {
         final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
         final SessionOutputBuffer outbuffer = new SessionOutputBufferImpl(16);
         final OutputStream out = new IdentityOutputStream(outbuffer, outputStream);
         out.close();
         out.close();
 
         try {
             final byte[] tmp = new byte[2];
             out.write(tmp, 0, tmp.length);
             Assert.fail("StreamClosedException expected");
         } catch (final StreamClosedException expected) {
         }
         try {
             out.write('a');
             Assert.fail("StreamClosedException expected");
         } catch (final IOException expected) {
         }
     }
 
 }