/*
    * ====================================================================
    * 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.http.entity;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.InputStream;
  
  import org.apache.http.Consts;
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Unit tests for {@link InputStreamEntity}.
   *
   */
  public class TestInputStreamEntity {
  
      @Test
      public void testBasics() throws Exception {
          final byte[] bytes = "Message content".getBytes(Consts.ISO_8859_1);
          final InputStream inStream = new ByteArrayInputStream(bytes);
          final InputStreamEntity httpentity = new InputStreamEntity(inStream, bytes.length);
  
          Assert.assertEquals(bytes.length, httpentity.getContentLength());
          Assert.assertEquals(inStream, httpentity.getContent());
          Assert.assertNotNull(httpentity.getContent());
          Assert.assertFalse(httpentity.isRepeatable());
          Assert.assertTrue(httpentity.isStreaming());
      }
  
      @Test(expected = IllegalArgumentException.class)
      public void testIllegalConstructor() throws Exception {
          new InputStreamEntity(null, 0);
      }
  
      @Test
      public void testUnknownLengthConstructor() throws Exception {
          final InputStream inStream = new ByteArrayInputStream(new byte[0]);
          final InputStreamEntity httpentity = new InputStreamEntity(inStream);
          Assert.assertEquals(-1, httpentity.getContentLength());
      }
  
      @Test
      public void testWriteTo() throws Exception {
          final String message = "Message content";
          final byte[] bytes = message.getBytes(Consts.ISO_8859_1);
          final InputStream inStream = new ByteArrayInputStream(bytes);
          final InputStreamEntity httpentity = new InputStreamEntity(inStream, bytes.length);
  
          final ByteArrayOutputStream out = new ByteArrayOutputStream();
          httpentity.writeTo(out);
          final byte[] writtenBytes = out.toByteArray();
          Assert.assertNotNull(writtenBytes);
          Assert.assertEquals(bytes.length, writtenBytes.length);
  
          final String s = new String(writtenBytes, Consts.ISO_8859_1.name());
          Assert.assertEquals(message, s);
      }
  
      @Test
      public void testWriteToPartialContent() throws Exception {
          final String message = "Message content";
          final byte[] bytes = message.getBytes(Consts.ISO_8859_1);
          final InputStream inStream = new ByteArrayInputStream(bytes);
          final int contentLength = 7;
          final InputStreamEntity httpentity = new InputStreamEntity(inStream, contentLength);
  
          final ByteArrayOutputStream out = new ByteArrayOutputStream();
          httpentity.writeTo(out);
          final byte[] writtenBytes = out.toByteArray();
          Assert.assertNotNull(writtenBytes);
          Assert.assertEquals(contentLength, writtenBytes.length);
  
         final String s = new String(writtenBytes, Consts.ISO_8859_1.name());
         Assert.assertEquals(message.substring(0, contentLength), s);
     }
 
     @Test
     public void testWriteToUnknownLength() throws Exception {
         final String message = "Message content";
         final byte[] bytes = message.getBytes(Consts.ISO_8859_1);
         final InputStream inStream = new ByteArrayInputStream(bytes);
         final InputStreamEntity httpentity = new InputStreamEntity(inStream);
 
         final ByteArrayOutputStream out = new ByteArrayOutputStream();
         httpentity.writeTo(out);
         final byte[] writtenBytes = out.toByteArray();
         Assert.assertNotNull(writtenBytes);
         Assert.assertEquals(bytes.length, writtenBytes.length);
 
         final String s = new String(writtenBytes, Consts.ISO_8859_1.name());
         Assert.assertEquals(message, s);
     }
 
     @Test(expected = IllegalArgumentException.class)
     public void testWriteToNull() throws Exception {
         final InputStream inStream = new ByteArrayInputStream(new byte[0]);
         final InputStreamEntity httpentity = new InputStreamEntity(inStream, 0);
         httpentity.writeTo(null);
     }
 }