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1   /*
2    * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
3    * The software in this package is published under the terms of the CPAL v1.0
4    * license, a copy of which has been included with this distribution in the
5    * LICENSE.txt file.
6    */
7   package org.mule.processor;
8   
9   import org.mule.api.MuleEvent;
10  import org.mule.api.MuleException;
11  import org.mule.api.processor.MessageProcessor;
12  import org.mule.processor.chain.DefaultMessageProcessorChainBuilder;
13  import org.mule.tck.junit4.AbstractMuleContextTestCase;
14  import org.mule.transformer.simple.StringAppendTransformer;
15  
16  import org.junit.Test;
17  
18  import static org.junit.Assert.assertEquals;
19  
20  public class ResponseMessageProcessorAdapterTestCase extends AbstractMuleContextTestCase
21  {
22  
23      @Test
24      public void testResponseAdaptorSingleMP() throws MuleException, Exception
25      {
26          DefaultMessageProcessorChainBuilder builder = new DefaultMessageProcessorChainBuilder();
27          builder.chain(new StringAppendTransformer("1"), new ResponseMessageProcessorAdapter(
28              new StringAppendTransformer("3")), new StringAppendTransformer("2"));
29          assertEquals("0123", builder.build().process(getTestEventUsingFlow("0")).getMessageAsString());
30      }
31  
32      @Test
33      public void testResponseAdaptorSingleMPReturnsNull() throws MuleException, Exception
34      {
35          DefaultMessageProcessorChainBuilder builder = new DefaultMessageProcessorChainBuilder();
36          builder.chain(new StringAppendTransformer("1"), new ResponseMessageProcessorAdapter(
37              new ReturnNullMP()), new StringAppendTransformer("2"));
38          assertEquals("012", builder.build().process(getTestEventUsingFlow("0")).getMessageAsString());
39      }
40  
41      @Test
42      public void testResponseAdaptorNestedChain() throws MuleException, Exception
43      {
44          DefaultMessageProcessorChainBuilder builder = new DefaultMessageProcessorChainBuilder();
45          builder.chain(
46              new StringAppendTransformer("1"),
47              new ResponseMessageProcessorAdapter(new DefaultMessageProcessorChainBuilder().chain(
48                  new StringAppendTransformer("a"), new StringAppendTransformer("b")).build()),
49              new StringAppendTransformer("2"));
50          assertEquals("012ab", builder.build().process(getTestEventUsingFlow("0")).getMessageAsString());
51      }
52  
53      @Test
54      public void testResponseAdaptorNestedChainReturnsNull() throws MuleException, Exception
55      {
56          DefaultMessageProcessorChainBuilder builder = new DefaultMessageProcessorChainBuilder();
57          builder.chain(
58              new StringAppendTransformer("1"),
59              new ResponseMessageProcessorAdapter(new DefaultMessageProcessorChainBuilder().chain(
60                  new StringAppendTransformer("a"), new StringAppendTransformer("b"), new ReturnNullMP())
61                  .build()), new StringAppendTransformer("2"));
62          assertEquals("012", builder.build().process(getTestEventUsingFlow("0")).getMessageAsString());
63      }
64  
65      private static class ReturnNullMP implements MessageProcessor
66      {
67          public MuleEvent process(MuleEvent event) throws MuleException
68          {
69              return null;
70          }
71      }
72  
73  }