1   /***
2    * Redistribution  and use  in source  and binary  forms, with  or without
3    * modification, are permitted provided  that the following conditions are
4    * met :
5    *
6    * . Redistributions  of  source  code  must  retain  the  above copyright
7    *   notice, this list of conditions and the following disclaimer.
8    *
9    * . Redistributions in  binary form  must reproduce  the above  copyright
10   *   notice, this list of conditions  and the following disclaimer in  the
11   *   documentation and/or other materials provided with the distribution.
12   *
13   * . The name of the author may not be used to endorse or promote products
14   *   derived from this software without specific prior written permission.
15   *
16   * THIS SOFTWARE IS  PROVIDED BY THE  AUTHOR ``AS IS''  AND ANY EXPRESS  OR
17   * IMPLIED  WARRANTIES,  INCLUDING,  BUT   NOT  LIMITED  TO,  THE   IMPLIED
18   * WARRANTIES OF MERCHANTABILITY AND  FITNESS FOR A PARTICULAR  PURPOSE ARE
19   * DISCLAIMED.  IN NO  EVENT SHALL  THE AUTHOR  BE LIABLE  FOR ANY  DIRECT,
20   * INDIRECT,  INCIDENTAL,  SPECIAL,  EXEMPLARY,  OR  CONSEQUENTIAL  DAMAGES
21   * (INCLUDING,  BUT  NOT LIMITED  TO,  PROCUREMENT OF  SUBSTITUTE  GOODS OR
22   * SERVICES;  LOSS  OF USE,  DATA,  OR PROFITS;  OR  BUSINESS INTERRUPTION)
23   * HOWEVER CAUSED  AND ON  ANY THEORY  OF LIABILITY,  WHETHER IN  CONTRACT,
24   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
25   * ANY  WAY  OUT OF  THE  USE OF  THIS  SOFTWARE, EVEN  IF  ADVISED OF  THE
26   * POSSIBILITY OF SUCH DAMAGE.
27   *
28   * $Id$
29   */
30  
31  package palmed.edit.selection;
32  
33  import palmed.edit.selection.IAction;
34  import palmed.edit.selection.UndoManager;
35  import palmed.util.EasyMockTestCase;
36  
37  /***
38   * UndoRedoManager test case.
39   *
40   * @author Mathieu Champlon
41   * @version $Revision$ $Date$
42   */
43  public class UndoManagerTest extends EasyMockTestCase
44  {
45      private static final int STACK_SIZE = 2;
46      /***
47       * Tested object.
48       */
49      private UndoManager manager_;
50      /***
51       * Mock objects.
52       */
53      private IAction mockAction_;
54  
55      protected void setUp()
56      {
57          manager_ = new UndoManager( STACK_SIZE );
58          mockAction_ = (IAction)createMock( IAction.class );
59      }
60  
61      public void testUndoWhileNothingToUndoIsNoOp()
62      {
63          manager_.undo();
64      }
65  
66      public void testRedoWhileNothingToRedoIsNoOp()
67      {
68          manager_.redo();
69      }
70  
71      public void testAddedActionIsUndoneOnceOnUndo()
72      {
73          manager_.add( mockAction_ );
74          reset();
75          mockAction_.undo();
76          replay();
77          manager_.undo();
78          verify();
79          manager_.undo();
80      }
81  
82      public void testUndoneActionIsRedoneOnceOnRedo()
83      {
84          manager_.add( mockAction_ );
85          manager_.undo();
86          reset();
87          mockAction_.redo();
88          replay();
89          manager_.redo();
90          verify();
91          manager_.redo();
92      }
93  
94      public void testRedoActionsAreRemovedUponActionAdd()
95      {
96          manager_.add( mockAction_ );
97          manager_.undo();
98          manager_.add( mockAction_ );
99          reset();
100         manager_.redo();
101     }
102 
103     public void testAddActionOverStackSizeRemovesTheFirstOne()
104     {
105         manager_.add( (IAction)createMock( IAction.class ) );
106         manager_.add( mockAction_ );
107         manager_.add( mockAction_ );
108         reset();
109         mockAction_.undo();
110         mockAction_.undo();
111         replay();
112         manager_.undo();
113         manager_.undo();
114         manager_.undo();
115     }
116 
117     public void testAddTwoMergableActionsDiscardsTheSecondOne()
118     {
119         final IAction mockOtherAction = (IAction)createMock( IAction.class );
120         manager_.add( mockAction_ );
121         reset();
122         mockAction_.merge( mockOtherAction );
123         control( mockAction_ ).setReturnValue( true );
124         replay();
125         manager_.add( mockOtherAction );
126         verify();
127         reset();
128         mockAction_.undo();
129         replay();
130         manager_.undo();
131         manager_.undo();
132     }
133 }