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 javax.xml.parsers.DocumentBuilder;
51  import javax.xml.parsers.DocumentBuilderFactory;
52  import javax.xml.parsers.ParserConfigurationException;
53  
54  import junit.framework.TestCase;
55  
56  import org.jaxen.FunctionCallException;
57  import org.jaxen.JaxenException;
58  import org.jaxen.XPath;
59  import org.jaxen.dom.DOMXPath;
60  import org.w3c.dom.Document;
61  
62  /***
63   * @author Elliotte Rusty Harold
64   *
65   */
66  public class RoundTest extends TestCase {
67  
68      private Document doc;
69      
70      public void setUp() throws ParserConfigurationException
71      {
72          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
73          factory.setNamespaceAware(true);
74          DocumentBuilder builder = factory.newDocumentBuilder();
75          doc = builder.newDocument();
76          org.w3c.dom.Element a = doc.createElementNS("", "a");
77          doc.appendChild(a);
78      }
79  
80  
81      public RoundTest(String name) {
82          super(name);
83      }
84  
85      
86      public void testRound() throws JaxenException {
87          
88          XPath xpath = new DOMXPath("round(1.5)");
89          
90          Object result = xpath.evaluate(doc);
91          assertEquals(2, ((Double) result).doubleValue(), 0.0001);
92          
93      }    
94  
95      public void testNegativeRound() throws JaxenException {
96          
97          XPath xpath = new DOMXPath("round(-1.5)");
98          
99          Object result = xpath.evaluate(doc);
100         assertEquals(-1, ((Double) result).doubleValue(), 0.0001);
101         
102     }    
103 
104     public void testNaNRoundIsNaN() throws JaxenException {
105         XPath xpath = new DOMXPath("round(1.0 div 0.0 - 2.0 div 0.0)");
106         double result = ((Double) xpath.evaluate(doc)).doubleValue();
107         assertTrue(Double.isNaN(result));
108     }    
109 
110     public void testRoundFunctionRequiresAtLeastOneArgument() 
111       throws JaxenException {
112         
113         XPath xpath = new DOMXPath("round()");
114         
115         try {
116             xpath.selectNodes(doc);
117             fail("Allowed round function with no arguments");
118         }
119         catch (FunctionCallException ex) {
120             assertNotNull(ex.getMessage());
121         }
122         
123     }    
124 
125     public void testRoundFunctionRequiresAtMostOneArgument() 
126       throws JaxenException {
127         
128         XPath xpath = new DOMXPath("round(2.2, 1.2)");
129         
130         try {
131             xpath.selectNodes(doc);
132             fail("Allowed round function with two arguments");
133         }
134         catch (FunctionCallException ex) {
135             assertNotNull(ex.getMessage());
136         }
137         
138     }    
139 
140 }