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    * Licensed to the Apache Software Foundation (ASF) under one
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    * 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
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  package org.apache.http.impl.entity;
  
  import org.apache.http.HttpMessage;
  import org.apache.http.entity.ContentLengthStrategy;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class TestLaxContentLengthStrategy {
  
      @Test
      public void testEntityWithTransferEncoding() throws Exception {
          final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
          final HttpMessage message = new DummyHttpMessage();
  
          message.addHeader("Content-Type", "unknown");
          message.addHeader("Transfer-Encoding", "identity, chunked");
          message.addHeader("Content-Length", "plain wrong");
          Assert.assertEquals(ContentLengthStrategy.CHUNKED, lenStrategy.determineLength(message));
      }
  
      @Test
      public void testEntityWithIdentityTransferEncoding() throws Exception {
          final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
          final HttpMessage message = new DummyHttpMessage();
  
          message.addHeader("Content-Type", "unknown");
          message.addHeader("Transfer-Encoding", "identity");
          message.addHeader("Content-Length", "plain wrong");
          Assert.assertEquals(ContentLengthStrategy.IDENTITY, lenStrategy.determineLength(message));
      }
  
      @Test
      public void testEntityWithUnsupportedTransferEncoding() throws Exception {
          final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
          final HttpMessage message = new DummyHttpMessage();
  
          message.addHeader("Content-Type", "unknown");
          message.addHeader("Transfer-Encoding", "whatever; param=value, chunked");
          message.addHeader("Content-Length", "plain wrong");
          Assert.assertEquals(ContentLengthStrategy.CHUNKED, lenStrategy.determineLength(message));
      }
  
      @Test
      public void testChunkedTransferEncodingMustBeLast() throws Exception {
          final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
          final HttpMessage message = new DummyHttpMessage();
  
          message.addHeader("Content-Type", "unknown");
          message.addHeader("Transfer-Encoding", "chunked, identity");
          message.addHeader("Content-Length", "plain wrong");
          Assert.assertEquals(ContentLengthStrategy.IDENTITY, lenStrategy.determineLength(message));
      }
  
      @Test
      public void testEntityWithContentLength() throws Exception {
          final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
          final HttpMessage message = new DummyHttpMessage();
  
          message.addHeader("Content-Type", "unknown");
          message.addHeader("Content-Length", "0");
          Assert.assertEquals(0, lenStrategy.determineLength(message));
      }
  
      @Test
      public void testEntityWithMultipleContentLength() throws Exception {
          final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
          final HttpMessage message = new DummyHttpMessage();
  
          message.addHeader("Content-Type", "unknown");
          message.addHeader("Content-Length", "0");
          message.addHeader("Content-Length", "0");
          message.addHeader("Content-Length", "1");
         Assert.assertEquals(1, lenStrategy.determineLength(message));
     }
 
     @Test
     public void testEntityWithMultipleContentLengthSomeWrong() throws Exception {
         final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
         final HttpMessage message = new DummyHttpMessage();
 
         message.addHeader("Content-Type", "unknown");
         message.addHeader("Content-Length", "1");
         message.addHeader("Content-Length", "yyy");
         message.addHeader("Content-Length", "xxx");
         Assert.assertEquals(1, lenStrategy.determineLength(message));
     }
 
     @Test
     public void testEntityWithMultipleContentLengthAllWrong() throws Exception {
         final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
         final HttpMessage message = new DummyHttpMessage();
 
         message.addHeader("Content-Type", "unknown");
         message.addHeader("Content-Length", "yyy");
         message.addHeader("Content-Length", "xxx");
         Assert.assertEquals(ContentLengthStrategy.IDENTITY, lenStrategy.determineLength(message));
     }
 
     @Test
     public void testEntityWithInvalidContentLength() throws Exception {
         final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
         final HttpMessage message = new DummyHttpMessage();
 
         message.addHeader("Content-Type", "unknown");
         message.addHeader("Content-Length", "xxx");
         Assert.assertEquals(ContentLengthStrategy.IDENTITY, lenStrategy.determineLength(message));
     }
 
     @Test
     public void testEntityNeitherContentLengthNorTransferEncoding() throws Exception {
         final ContentLengthStrategy lenStrategy = new LaxContentLengthStrategy();
         final HttpMessage message = new DummyHttpMessage();
 
         // lenient mode
         Assert.assertEquals(ContentLengthStrategy.IDENTITY, lenStrategy.determineLength(message));
     }
 
 }