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 javax.xml.parsers.DocumentBuilder;
65  import javax.xml.parsers.DocumentBuilderFactory;
66  import javax.xml.parsers.ParserConfigurationException;
67  
68  import junit.framework.TestCase;
69  
70  import org.jaxen.FunctionCallException;
71  import org.jaxen.JaxenException;
72  import org.jaxen.XPath;
73  import org.jaxen.dom.DOMXPath;
74  import org.w3c.dom.Document;
75  
76  /***
77   * @author Elliotte Rusty Harold
78   *
79   */
80  public class SubstringTest extends TestCase {
81  
82      private Document doc;
83      
84      public void setUp() throws ParserConfigurationException
85      {
86          DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
87          factory.setNamespaceAware(true);
88          DocumentBuilder builder = factory.newDocumentBuilder();
89          doc = builder.newDocument();
90          doc.appendChild(doc.createElement("root"));
91      }
92  
93  
94      public SubstringTest(String name) {
95          super(name);
96      }
97  
98      public void testSubstringOfNumber() throws JaxenException
99      {
100         XPath xpath = new DOMXPath( "substring(1234, 3)" );
101         String result = (String) xpath.evaluate( doc );
102         assertEquals("34", result);
103     }    
104   
105     public void testSubstringOfNumber2() throws JaxenException
106     {
107         XPath xpath = new DOMXPath( "substring(1234, 2, 3)" );
108         String result = (String) xpath.evaluate( doc );
109         assertEquals("234", result);
110     }    
111     
112     // Unusual tests from XPath spec
113     
114     public void testUnusualSubstring1() throws JaxenException
115     {
116         XPath xpath = new DOMXPath( "substring('12345', 1.5, 2.6)" );
117         String result = (String) xpath.evaluate( doc );
118         assertEquals("234", result);
119     }    
120 
121 
122     public void testUnusualSubstring2() throws JaxenException
123     {
124         XPath xpath = new DOMXPath( "substring('12345', 0, 3)" );
125         String result = (String) xpath.evaluate( doc );
126         assertEquals("12", result);
127     }    
128 
129 
130     public void testUnusualSubstring3() throws JaxenException
131     {
132         XPath xpath = new DOMXPath( "substring('12345', 0 div 0, 3)" );
133         String result = (String) xpath.evaluate( doc );
134         assertEquals("", result);
135     }    
136 
137     public void testUnusualSubstring4() throws JaxenException
138     {
139         XPath xpath = new DOMXPath( "substring('12345', 1, 0 div 0)" );
140         String result = (String) xpath.evaluate( doc );
141         assertEquals("", result);
142     }    
143 
144     public void testUnusualSubstring5() throws JaxenException
145     {
146         XPath xpath = new DOMXPath( "substring('12345', -42, 1 div 0)" );
147         String result = (String) xpath.evaluate( doc );
148         assertEquals("12345", result);
149     }    
150 
151     public void testUnusualSubstring6() throws JaxenException
152     {
153         XPath xpath = new DOMXPath( "substring('12345', -1 div 0, 1 div 0)" );
154         String result = (String) xpath.evaluate( doc );
155         assertEquals("", result);
156     }    
157 
158   
159     public void testSubstringOfNaN() throws JaxenException
160     {
161         XPath xpath = new DOMXPath( "substring(0 div 0, 2)" );
162         String result = (String) xpath.evaluate( doc );
163         assertEquals("aN", result);
164     }    
165  
166   
167     public void testSubstringOfEmptyString() throws JaxenException
168     {
169         XPath xpath = new DOMXPath( "substring('', 2)" );
170         String result = (String) xpath.evaluate( doc );
171         assertEquals("", result);
172     }    
173  
174   
175     public void testSubstringWithNegativeLength() throws JaxenException
176     {
177         XPath xpath = new DOMXPath( "substring('12345', 2, -3)" );
178         String result = (String) xpath.evaluate( doc );
179         assertEquals("", result);
180     }    
181  
182   
183     public void testSubstringWithExcessiveLength() throws JaxenException
184     {
185         XPath xpath = new DOMXPath( "substring('12345', 2, 32)" );
186         String result = (String) xpath.evaluate( doc );
187         assertEquals("2345", result);
188     }    
189  
190   
191     public void testSubstringWithNegativeLength2() throws JaxenException
192     {
193         XPath xpath = new DOMXPath( "substring('12345', 2, -1)" );
194         String result = (String) xpath.evaluate( doc );
195         assertEquals("", result);
196     }    
197  
198   
199     public void testSubstringFunctionRequiresAtLeastTwoArguments() 
200       throws JaxenException {
201         
202         XPath xpath = new DOMXPath("substring('a')");
203         
204         try {
205             xpath.selectNodes(doc);
206             fail("Allowed substring function with one argument");
207         }
208         catch (FunctionCallException ex) {
209             assertNotNull(ex.getMessage());
210         }
211         
212     }    
213 
214     public void testNegativeStartNoLength() 
215       throws JaxenException {
216         
217         XPath xpath = new DOMXPath("substring('Hello', -50)");
218         String result = (String) xpath.evaluate( doc );
219         assertEquals("Hello", result);
220         
221     }    
222 
223     public void testNegativeStartWithLength() 
224       throws JaxenException {
225         
226         XPath xpath = new DOMXPath("substring('Hello', -50, 20)");
227         String result = (String) xpath.evaluate( doc );
228         assertEquals("", result);
229         
230     }    
231 
232     public void testSubstringFunctionRequiresAtMostThreeArguments() 
233       throws JaxenException {
234         
235         XPath xpath = new DOMXPath("substring('a', 1, 1, 4)");
236         
237         try {
238             xpath.selectNodes(doc);
239             fail("Allowed substring function with four arguments");
240         }
241         catch (FunctionCallException ex) {
242             assertNotNull(ex.getMessage());
243         }
244         
245     }
246 
247     public void testStringLengthCountsUnicodeCharactersNotJavaChars() 
248       throws JaxenException {
249    
250         XPath xpath = new DOMXPath("substring('A\uD834\uDD00', 1, 2)");
251         String result = (String) xpath.evaluate( doc );
252         assertEquals("A\uD834\uDD00", result);
253         
254     }
255     
256     
257     public void testStringLengthIndexesUnicodeCharactersNotJavaChars() 
258       throws JaxenException {
259    
260         XPath xpath = new DOMXPath("substring('A\uD834\uDD00', 3, 1)");
261         String result = (String) xpath.evaluate( doc );
262         assertEquals("", result);
263         
264     }
265     
266     
267     public void testStringLengthIndexesAndCountsUnicodeCharactersNotJavaChars() 
268       throws JaxenException {
269    
270         XPath xpath = new DOMXPath("substring('A\uD834\uDD00123', 3, 2)");
271         String result = (String) xpath.evaluate( doc );
272         assertEquals("12", result);
273         
274     }
275     
276     
277 }