1   package org.apache.velocity.test.issues;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.    
20   */
21  
22  import org.apache.velocity.app.event.EventCartridge;
23  import org.apache.velocity.app.event.IncludeEventHandler;
24  import org.apache.velocity.context.Context;
25  import org.apache.velocity.exception.VelocityException;
26  import org.apache.velocity.test.BaseTestCase;
27  
28  /**
29   * This class tests VELOCITY-758.
30   */
31  public class Velocity758TestCase extends BaseTestCase
32  {
33      public Velocity758TestCase(String name)
34      {
35          super(name);
36      }
37  
38      public void testNullArgumentForParse()
39      {
40          assertEvalEquals("", "#parse($foo)");
41      }
42  
43      public void testOverrideNullArgumentForParse()
44      {
45          String nullContent = "Parse arg was null";
46          addTemplate("null.vm", nullContent);
47          
48          EventCartridge ec = new EventCartridge();
49          ec.addEventHandler(new Handler());
50          ec.attachToContext(context);
51  
52          assertEvalEquals(nullContent, "#parse($foo)");
53      }
54  
55      public static class Handler implements IncludeEventHandler
56      {
57          public String includeEvent(String parsePath, String parentPath, String directive)
58          {
59              if (parsePath == null)
60              {
61                  parsePath = "null.vm";
62              }
63              return parsePath;
64          }
65      }
66  }