1   /*
2    * $Header$
3    * $Revision$
4    * $Date$
5    *
6    * ====================================================================
7    *
8    * Copyright 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 are
13   * met:
14   * 
15   *   * Redistributions of source code must retain the above copyright
16   *     notice, this list of conditions and the following disclaimer.
17   * 
18   *   * Redistributions in binary form must reproduce the above copyright
19   *     notice, this list of conditions and the following disclaimer in the
20   *     documentation and/or other materials provided with the distribution.
21   * 
22   *   * Neither the name of the Jaxen Project nor the names of its
23   *     contributors may be used to endorse or promote products derived 
24   *     from this software without specific prior written permission.
25   * 
26   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
29   * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
30   * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
31   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
32   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
33   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
34   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
35   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
36   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37   *
38   * ====================================================================
39   * This software consists of voluntary contributions made by many 
40   * individuals on behalf of the Jaxen Project and was originally 
41   * created by bob mcwhirter <bob@werken.com> and 
42   * James Strachan <jstrachan@apache.org>.  For more information on the 
43   * Jaxen Project, please see <http://www.jaxen.org/>.
44   * 
45   * $Id$
46   */
47  
48  package org.jaxen.test;
49  
50  import java.util.List;
51  
52  import javax.xml.parsers.DocumentBuilder;
53  import javax.xml.parsers.DocumentBuilderFactory;
54  import javax.xml.parsers.ParserConfigurationException;
55  
56  import junit.framework.TestCase;
57  
58  import org.jaxen.BaseXPath;
59  import org.jaxen.FunctionCallException;
60  import org.jaxen.JaxenException;
61  import org.jaxen.dom.DOMXPath;
62  import org.w3c.dom.Document;
63  
64  /***
65   * @author Elliotte Rusty Harold
66   *
67   */
68  public class BooleanTest extends TestCase {
69  
70      private Document doc;
71      
72      public void setUp() throws ParserConfigurationException
73      {
74          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
75          factory.setNamespaceAware(true);
76          DocumentBuilder builder = factory.newDocumentBuilder();
77          doc = builder.newDocument();
78      }
79  
80  
81      public BooleanTest(String name) {
82          super(name);
83      }
84  
85      // test case for JAXEN-55
86      public void testNonEmptyNodeSetsAreTrue() 
87        throws JaxenException {
88          
89          BaseXPath xpath = new DOMXPath("boolean(//x)");
90          org.w3c.dom.Element a = doc.createElementNS("", "a");
91          org.w3c.dom.Element b = doc.createElementNS("", "b");
92          doc.appendChild(a);
93          a.appendChild(b);
94          org.w3c.dom.Element x2 = doc.createElementNS("", "x");
95          org.w3c.dom.Element x3 = doc.createElementNS("", "x");
96          org.w3c.dom.Element x4 = doc.createElementNS("", "x");
97          a.appendChild(x4);
98          b.appendChild(x2);
99          b.appendChild(x3);
100         x2.appendChild(doc.createTextNode("false"));
101         x3.appendChild(doc.createTextNode("false"));
102         x4.appendChild(doc.createTextNode("false"));
103         
104         List result = xpath.selectNodes(doc);
105         assertEquals(1, result.size());
106         assertEquals(Boolean.TRUE, result.get(0));
107         
108     }    
109 
110     public void testEmptyNodeSetsAreFalse() 
111       throws JaxenException {
112         
113         BaseXPath xpath = new DOMXPath("boolean(//y)");
114         org.w3c.dom.Element a = doc.createElementNS("", "a");
115         org.w3c.dom.Element b = doc.createElementNS("", "b");
116         doc.appendChild(a);
117         a.appendChild(b);
118         org.w3c.dom.Element x2 = doc.createElementNS("", "x");
119         org.w3c.dom.Element x3 = doc.createElementNS("", "x");
120         org.w3c.dom.Element x4 = doc.createElementNS("", "x");
121         a.appendChild(x4);
122         b.appendChild(x2);
123         b.appendChild(x3);
124         x2.appendChild(doc.createTextNode("false"));
125         x3.appendChild(doc.createTextNode("false"));
126         x4.appendChild(doc.createTextNode("false"));
127         
128         List result = xpath.selectNodes(doc);
129         assertEquals(1, result.size());
130         assertEquals(Boolean.FALSE, result.get(0));
131         
132     }    
133 
134     public void testZeroIsFalse() 
135       throws JaxenException {
136         
137         BaseXPath xpath = new DOMXPath("boolean(0)");
138         org.w3c.dom.Element a = doc.createElementNS("", "a");
139         
140         List result = xpath.selectNodes(a);
141         assertEquals(1, result.size());
142         assertEquals(Boolean.FALSE, result.get(0));
143         
144     }    
145 
146     public void testEmptyStringIsFalse() 
147       throws JaxenException {
148         
149         BaseXPath xpath = new DOMXPath("boolean('')");
150         org.w3c.dom.Element a = doc.createElementNS("", "a");
151         
152         List result = xpath.selectNodes(a);
153         assertEquals(1, result.size());
154         assertEquals(Boolean.FALSE, result.get(0));
155         
156     }    
157 
158     public void testNaNIsFalse() 
159       throws JaxenException {
160         
161         BaseXPath xpath = new DOMXPath("boolean(0 div 0)");
162         Object result = xpath.evaluate(null);
163         assertEquals(Boolean.FALSE, result);
164         
165     }    
166 
167     public void testNonEmptyStringIsTrue() 
168       throws JaxenException {
169         
170         BaseXPath xpath = new DOMXPath("boolean('false')");
171         org.w3c.dom.Element a = doc.createElementNS("", "a");
172         
173         List result = xpath.selectNodes(a);
174         assertEquals(1, result.size());
175         assertEquals(Boolean.TRUE, result.get(0));
176         
177     }    
178 
179     public void testBooleanFunctionRequiresOneArgument() 
180       throws JaxenException {
181         
182         BaseXPath xpath = new DOMXPath("boolean()");
183         org.w3c.dom.Element a = doc.createElementNS("", "a");
184         
185         try {
186             xpath.selectNodes(a);
187             fail("Allowed boolean function with no arguments");
188         }
189         catch (FunctionCallException ex) {
190             assertNotNull(ex.getMessage());
191         }
192         
193     }    
194 
195     public void testBooleanFunctionRequiresExactlyOneArgument() 
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 two arguments");
204         }
205         catch (FunctionCallException ex) {
206             assertNotNull(ex.getMessage());
207         }
208         
209     }    
210 
211 }