1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.commons.proxy.exception;
19  
20  import junit.framework.TestCase;
21  
22  /**
23   * @author James Carman
24   * @since 1.0
25   */
26  public abstract class AbstractExceptionClassTestCase extends TestCase
27  {
28      private final Class exceptionClass;
29  
30      public AbstractExceptionClassTestCase( Class exceptionClass )
31      {
32          this.exceptionClass = exceptionClass;
33      }
34  
35      public void testNoArgConstructor() throws Exception
36      {
37          Exception e = ( Exception )exceptionClass.getConstructor( new Class[] {} ).newInstance( new Object[] {} );
38          assertNull( e.getMessage() );
39          assertNull( e.getCause() );
40      }
41  
42      public void testMessageOnlyConstructor() throws Exception
43      {
44          final String message = "message";
45          Exception e = ( Exception )exceptionClass.getConstructor( new Class[] { String.class } ).newInstance( new Object[] { message } );
46          assertEquals( message, e.getMessage() );
47          assertNull( e.getCause() );
48      }
49  
50      public void testCauseOnlyConstructor() throws Exception
51      {
52          final Exception cause = new Exception();
53          Exception e = ( Exception )exceptionClass.getConstructor( new Class[] { Throwable.class } ).newInstance( new Object[] { cause } );
54          assertEquals( cause.toString(), e.getMessage() );
55          assertEquals( cause, e.getCause() );
56      }
57  
58      public void testMessageAndCauseConstructor() throws Exception
59      {
60          final Exception cause = new Exception();
61          final String message = "message";
62          Exception e = ( Exception )exceptionClass.getConstructor( new Class[] { String.class, Throwable.class } ).newInstance( new Object[] { message, cause } );
63          assertEquals( message, e.getMessage() );
64          assertEquals( cause, e.getCause() );
65      }
66  }