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.Navigator;
61  import org.jaxen.XPath;
62  import org.jaxen.dom.DOMXPath;
63  import org.jaxen.dom.DocumentNavigator;
64  import org.jaxen.function.NumberFunction;
65  import org.w3c.dom.Document;
66  
67  /**
68   * @author Elliotte Rusty Harold
69   *
70   */
71  public class NumberTest extends TestCase {
72  
73      private Document doc;
74      
75      public void setUp() throws ParserConfigurationException
76      {
77          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
78          factory.setNamespaceAware(true);
79          DocumentBuilder builder = factory.newDocumentBuilder();
80          doc = builder.newDocument();
81      }
82  
83  
84      public NumberTest(String name) {
85          super(name);
86      }
87  
88      // test case for JAXEN-55
89      public void testNumberFunctionOperatesOnFirstNodeInDocumentOrder() 
90        throws JaxenException {
91          
92          XPath xpath = new DOMXPath("number(//x)");
93          org.w3c.dom.Element a = doc.createElementNS("", "a");
94          org.w3c.dom.Element b = doc.createElementNS("", "b");
95          doc.appendChild(a);
96          a.appendChild(b);
97          org.w3c.dom.Element x2 = doc.createElementNS("", "x");
98          org.w3c.dom.Element x3 = doc.createElementNS("", "x");
99          org.w3c.dom.Element x4 = doc.createElementNS("", "x");
100         a.appendChild(x4);
101         b.appendChild(x2);
102         b.appendChild(x3);
103         x2.appendChild(doc.createTextNode("2"));
104         x3.appendChild(doc.createTextNode("3"));
105         x4.appendChild(doc.createTextNode("4"));
106         
107         List result = xpath.selectNodes(doc);
108         assertEquals(1, result.size());
109         assertEquals(Double.valueOf("2.0"), result.get(0));
110         
111     }    
112 
113     public void testNumberFunctionOperatesOnContextNode() 
114       throws JaxenException {
115         
116         XPath xpath = new DOMXPath("number()");
117         org.w3c.dom.Element a = doc.createElementNS("", "a");
118         doc.appendChild(a);
119         a.appendChild(doc.createTextNode("2"));
120         
121         Double result = (Double) xpath.evaluate(doc);
122         assertEquals(2, result.intValue());
123         
124     }   
125     
126     public void testBooleanConvertedToNumber() {
127         double tolerance = 0.0000001;
128         Navigator navigator = new DocumentNavigator();
129         assertEquals(0.0, NumberFunction.evaluate(Boolean.FALSE, navigator ).doubleValue(), tolerance);
130         assertEquals(1.0, NumberFunction.evaluate(Boolean.TRUE, navigator).doubleValue(), tolerance);
131         assertEquals(0.0, NumberFunction.evaluate(new Boolean(false), navigator).doubleValue(), tolerance);
132         assertEquals(1.0, NumberFunction.evaluate(new Boolean(true), navigator).doubleValue(), tolerance);
133     }
134 
135 
136     public void testNumberFunctionRequiresAtMostOneArgument() 
137       throws JaxenException {
138         
139         XPath xpath = new DOMXPath("number('2.2', '1.2')");
140         
141         try {
142             xpath.selectNodes(doc);
143             fail("Allowed number function with two arguments");
144         }
145         catch (FunctionCallException ex) {
146             assertNotNull(ex.getMessage());
147         }
148         
149     }     
150     
151     
152     public void testNumberFunctionAppliedToNonNumericString() 
153       throws JaxenException {
154         
155         XPath xpath = new DOMXPath("number('Marx')");
156         
157         Double result = (Double) xpath.evaluate(doc);
158         assertEquals(new Double(Double.NaN), result);
159         
160     }     
161     
162     public void testIsNan() {
163         assertTrue(NumberFunction.isNaN(0.0 / 0.0));
164     }     
165     
166 }