1   /*
2    * Copyright 2002,2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jelly.tags.junit;
17  
18  import org.apache.commons.jelly.JellyTagException;
19  import org.apache.commons.jelly.XMLOutput;
20  import org.apache.commons.jelly.expression.Expression;
21  
22  /***
23   * Compares an actual object against an expected object and if they are different
24   * then the test will fail.
25   *
26   * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
27   * @version $Revision: 155420 $
28   */
29  public class AssertEqualsTag extends AssertTagSupport {
30  
31      private Expression actual;
32      private Expression expected;
33  
34  
35      // Tag interface
36      //-------------------------------------------------------------------------
37      public void doTag(XMLOutput output) throws JellyTagException {
38          String message = getBodyText();
39  
40          Object expectedValue = expected.evaluate(context);
41          Object actualValue = actual.evaluate(context);
42  
43          if (expectedValue == null && actualValue == null) {
44              return;
45          }
46          if (actualValue != null && expectedValue.equals(actualValue)) {
47              return;
48          }
49  
50          String expressions = "\nExpected expression: "
51              + expected.getExpressionText()
52              + "\nActual expression: "
53              + actual.getExpressionText();
54  
55          failNotEquals(message, expectedValue, actualValue, expressions);
56      }
57  
58      // Properties
59      //-------------------------------------------------------------------------
60  
61      /***
62       * Sets the actual value which will be compared against the
63       * expected value.
64       */
65      public void setActual(Expression actual) {
66          this.actual = actual;
67      }
68  
69      /***
70       * Sets the expected value to be tested against
71       */
72      public void setExpected(Expression expected) {
73          this.expected = expected;
74      }
75  }