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.FunctionCallException;
59  import org.jaxen.JaxenException;
60  import org.jaxen.XPath;
61  import org.jaxen.dom.DOMXPath;
62  import org.jaxen.function.NumberFunction;
63  import org.w3c.dom.Document;
64  
65  /***
66   * @author Elliotte Rusty Harold
67   *
68   */
69  public class NumberTest extends TestCase {
70  
71      private Document doc;
72      
73      public void setUp() throws ParserConfigurationException
74      {
75          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
76          factory.setNamespaceAware(true);
77          DocumentBuilder builder = factory.newDocumentBuilder();
78          doc = builder.newDocument();
79      }
80  
81  
82      public NumberTest(String name) {
83          super(name);
84      }
85  
86      // test case for JAXEN-55
87      public void testNumberFunctionOperatesOnFirstNodeInDocumentOrder() 
88        throws JaxenException {
89          
90          XPath xpath = new DOMXPath("number(//x)");
91          org.w3c.dom.Element a = doc.createElementNS("", "a");
92          org.w3c.dom.Element b = doc.createElementNS("", "b");
93          doc.appendChild(a);
94          a.appendChild(b);
95          org.w3c.dom.Element x2 = doc.createElementNS("", "x");
96          org.w3c.dom.Element x3 = doc.createElementNS("", "x");
97          org.w3c.dom.Element x4 = doc.createElementNS("", "x");
98          a.appendChild(x4);
99          b.appendChild(x2);
100         b.appendChild(x3);
101         x2.appendChild(doc.createTextNode("2"));
102         x3.appendChild(doc.createTextNode("3"));
103         x4.appendChild(doc.createTextNode("4"));
104         
105         List result = xpath.selectNodes(doc);
106         assertEquals(1, result.size());
107         assertEquals(Double.valueOf("2.0"), result.get(0));
108         
109     }    
110 
111     public void testNumberFunctionOperatesOnContextNode() 
112       throws JaxenException {
113         
114         XPath xpath = new DOMXPath("number()");
115         org.w3c.dom.Element a = doc.createElementNS("", "a");
116         doc.appendChild(a);
117         a.appendChild(doc.createTextNode("2"));
118         
119         Double result = (Double) xpath.evaluate(doc);
120         assertEquals(2, result.intValue());
121         
122     }    
123 
124 
125     public void testNumberFunctionRequiresAtMostOneArgument() 
126       throws JaxenException {
127         
128         XPath xpath = new DOMXPath("number('2.2', '1.2')");
129         
130         try {
131             xpath.selectNodes(doc);
132             fail("Allowed number function with two arguments");
133         }
134         catch (FunctionCallException ex) {
135             assertNotNull(ex.getMessage());
136         }
137         
138     }     
139     
140     
141     public void testNumberFunctionAppliedToNonNumericString() 
142       throws JaxenException {
143         
144         XPath xpath = new DOMXPath("number('Marx')");
145         
146         Double result = (Double) xpath.evaluate(doc);
147         assertEquals(new Double(Double.NaN), result);
148         
149     }     
150     
151     public void testIsNan() {
152         assertTrue(NumberFunction.isNaN(0.0 / 0.0));
153     }     
154     
155 }