1   /*
2    * $Id: NullResultTestCase.java 10787 2008-02-12 18:51:50Z dfeist $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.transformer;
12  
13  import org.mule.api.transformer.Transformer;
14  import org.mule.api.transformer.TransformerException;
15  import org.mule.transport.NullPayload;
16  
17  public class NullResultTestCase extends AbstractTransformerTestCase
18  {
19  
20      private final NullResultTransformer transformer = new NullResultTransformer();
21  
22      public Object getTestData()
23      {
24          return new Object();
25      }
26  
27      public Object getResultData()
28      {
29          return NullPayload.getInstance();
30      }
31  
32      public Transformer getTransformer() throws Exception
33      {
34          return transformer;
35      }
36  
37      public Transformer getRoundTripTransformer() throws Exception
38      {
39          return null;
40      }
41  
42      public void testNullNotExpected() throws Exception
43      {
44          transformer.setReturnClass(String.class);
45          try
46          {
47              testTransform();
48              fail("Transformer should have thrown an exception because the return class doesn't match the result.");
49          }
50          catch (TransformerException e)
51          {
52              // expected
53          }
54      }
55  
56      public static final class NullResultTransformer extends AbstractTransformer
57      {
58          public NullResultTransformer()
59          {
60              super();
61              this.registerSourceType(Object.class);
62              this.setReturnClass(NullPayload.class);
63          }
64  
65          public Object doTransform(Object src, String encoding) throws TransformerException
66          {
67              return null;
68          }
69      }
70  
71  }