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Java > Open Source Codes > org > apache > commons > jelly > tags > junit > AssertEqualsTag


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 JavaDoc message = getBodyText();
39
40         Object JavaDoc expectedValue = expected.evaluate(context);
41         Object JavaDoc 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 JavaDoc 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 }
76
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