1   /*
2    * $Header$
3    * $Revision$
4    * $Date$
5    *
6    * ====================================================================
7    *
8    * Copyright (C) 2005 Elliotte Rusty Harold.
9    * All rights reserved.
10   *
11   * Redistribution and use in source and binary forms, with or without
12   * modification, are permitted provided that the following conditions
13   * are met:
14   * 
15   * 1. Redistributions of source code must retain the above copyright
16   *    notice, this list of conditions, and the following disclaimer.
17   *
18   * 2. Redistributions in binary form must reproduce the above copyright
19   *    notice, this list of conditions, and the disclaimer that follows 
20   *    these conditions in the documentation and/or other materials 
21   *    provided with the distribution.
22   *
23   * 3. The name "Jaxen" must not be used to endorse or promote products
24   *    derived from this software without prior written permission.  For
25   *    written permission, please contact license@jaxen.org.
26   * 
27   * 4. Products derived from this software may not be called "Jaxen", nor
28   *    may "Jaxen" appear in their name, without prior written permission
29   *    from the Jaxen Project Management (pm@jaxen.org).
30   * 
31   * In addition, we request (but do not require) that you include in the 
32   * end-user documentation provided with the redistribution and/or in the 
33   * software itself an acknowledgement equivalent to the following:
34   *     "This product includes software developed by the
35   *      Jaxen Project (http://www.jaxen.org/)."
36   * Alternatively, the acknowledgment may be graphical using the logos 
37   * available at http://www.jaxen.org/
38   *
39   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
40   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
41   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
42   * DISCLAIMED.  IN NO EVENT SHALL THE Jaxen AUTHORS OR THE PROJECT
43   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
45   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
46   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
47   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
48   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
49   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50   * SUCH DAMAGE.
51   *
52   * ====================================================================
53   * This software consists of voluntary contributions made by many 
54   * individuals on behalf of the Jaxen Project and was originally 
55   * created by bob mcwhirter <bob@werken.com> and 
56   * James Strachan <jstrachan@apache.org>.  For more information on the 
57   * Jaxen Project, please see <http://www.jaxen.org/>.
58   * 
59   * $Id$
60   */
61  
62  package org.jaxen.function;
63  
64  import java.io.IOException;
65  import java.util.List;
66  
67  import javax.xml.parsers.DocumentBuilder;
68  import javax.xml.parsers.DocumentBuilderFactory;
69  import javax.xml.parsers.ParserConfigurationException;
70  
71  import junit.framework.TestCase;
72  
73  import org.jaxen.BaseXPath;
74  import org.jaxen.FunctionCallException;
75  import org.jaxen.JaxenException;
76  import org.jaxen.dom.DOMXPath;
77  import org.w3c.dom.Document;
78  import org.xml.sax.SAXException;
79  
80  /***
81   * @author Elliotte Rusty Harold
82   *
83   */
84  public class BooleanTest extends TestCase {
85  
86      private Document doc;
87      
88      public void setUp() throws ParserConfigurationException, SAXException, IOException
89      {
90          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
91          factory.setNamespaceAware(true);
92          DocumentBuilder builder = factory.newDocumentBuilder();
93          doc = builder.newDocument();
94      }
95  
96  
97      public BooleanTest(String name) {
98          super(name);
99      }
100 
101     // test case for JAXEN-55
102     public void testNonEmptyNodeSetsAreTrue() 
103       throws JaxenException {
104         
105         BaseXPath xpath = new DOMXPath("boolean(//x)");
106         org.w3c.dom.Element a = doc.createElementNS("", "a");
107         org.w3c.dom.Element b = doc.createElementNS("", "b");
108         doc.appendChild(a);
109         a.appendChild(b);
110         org.w3c.dom.Element x2 = doc.createElementNS("", "x");
111         org.w3c.dom.Element x3 = doc.createElementNS("", "x");
112         org.w3c.dom.Element x4 = doc.createElementNS("", "x");
113         a.appendChild(x4);
114         b.appendChild(x2);
115         b.appendChild(x3);
116         x2.appendChild(doc.createTextNode("false"));
117         x3.appendChild(doc.createTextNode("false"));
118         x4.appendChild(doc.createTextNode("false"));
119         
120         List result = xpath.selectNodes(doc);
121         assertEquals(1, result.size());
122         assertEquals(Boolean.TRUE, result.get(0));
123         
124     }    
125 
126     public void testEmptyNodeSetsAreFalse() 
127       throws JaxenException {
128         
129         BaseXPath xpath = new DOMXPath("boolean(//y)");
130         org.w3c.dom.Element a = doc.createElementNS("", "a");
131         org.w3c.dom.Element b = doc.createElementNS("", "b");
132         doc.appendChild(a);
133         a.appendChild(b);
134         org.w3c.dom.Element x2 = doc.createElementNS("", "x");
135         org.w3c.dom.Element x3 = doc.createElementNS("", "x");
136         org.w3c.dom.Element x4 = doc.createElementNS("", "x");
137         a.appendChild(x4);
138         b.appendChild(x2);
139         b.appendChild(x3);
140         x2.appendChild(doc.createTextNode("false"));
141         x3.appendChild(doc.createTextNode("false"));
142         x4.appendChild(doc.createTextNode("false"));
143         
144         List result = xpath.selectNodes(doc);
145         assertEquals(1, result.size());
146         assertEquals(Boolean.FALSE, result.get(0));
147         
148     }    
149 
150     public void testZeroIsFalse() 
151       throws JaxenException {
152         
153         BaseXPath xpath = new DOMXPath("boolean(0)");
154         org.w3c.dom.Element a = doc.createElementNS("", "a");
155         
156         List result = xpath.selectNodes(a);
157         assertEquals(1, result.size());
158         assertEquals(Boolean.FALSE, result.get(0));
159         
160     }    
161 
162     public void testEmptyStringIsFalse() 
163       throws JaxenException {
164         
165         BaseXPath xpath = new DOMXPath("boolean('')");
166         org.w3c.dom.Element a = doc.createElementNS("", "a");
167         
168         List result = xpath.selectNodes(a);
169         assertEquals(1, result.size());
170         assertEquals(Boolean.FALSE, result.get(0));
171         
172     }    
173 
174     public void testNaNIsFalse() 
175       throws JaxenException {
176         
177         BaseXPath xpath = new DOMXPath("boolean(0 div 0)");
178         Object result = xpath.evaluate(null);
179         assertEquals(Boolean.FALSE, result);
180         
181     }    
182 
183     public void testNonEmptyStringIsTrue() 
184       throws JaxenException {
185         
186         BaseXPath xpath = new DOMXPath("boolean('false')");
187         org.w3c.dom.Element a = doc.createElementNS("", "a");
188         
189         List result = xpath.selectNodes(a);
190         assertEquals(1, result.size());
191         assertEquals(Boolean.TRUE, result.get(0));
192         
193     }    
194 
195     public void testBooleanFunctionRequiresOneArgument() 
196       throws JaxenException {
197         
198         BaseXPath xpath = new DOMXPath("boolean()");
199         org.w3c.dom.Element a = doc.createElementNS("", "a");
200         
201         try {
202             xpath.selectNodes(a);
203             fail("Allowed boolean function with no arguments");
204         }
205         catch (FunctionCallException ex) {
206             assertNotNull(ex.getMessage());
207         }
208         
209     }    
210 
211     public void testBooleanFunctionRequiresExactlyOneArgument() 
212       throws JaxenException {
213         
214         BaseXPath xpath = new DOMXPath("boolean('', '')");
215         org.w3c.dom.Element a = doc.createElementNS("", "a");
216         
217         try {
218             xpath.selectNodes(a);
219             fail("Allowed boolean function with two arguments");
220         }
221         catch (FunctionCallException ex) {
222             assertNotNull(ex.getMessage());
223         }
224         
225     }    
226 
227 }