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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 LastTest 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 LastTest(String name) {
82 super(name);
83 }
84
85
86 public void testLastFunction()
87 throws JaxenException {
88
89 BaseXPath xpath = new DOMXPath("//x[position()=last()]");
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("2"));
101 x3.appendChild(doc.createTextNode("3"));
102 x4.appendChild(doc.createTextNode("4"));
103
104 List result = xpath.selectNodes(doc);
105 assertEquals(2, result.size());
106 assertEquals(x3, result.get(0));
107 assertEquals(x4, result.get(1));
108
109 }
110
111 public void testLastFunctionAllowsNoArguments() throws JaxenException
112 {
113 try
114 {
115 BaseXPath xpath = new DOMXPath("//x[position()=last(.)]");
116 org.w3c.dom.Element a = doc.createElementNS("", "a");
117 org.w3c.dom.Element b = doc.createElementNS("", "b");
118 doc.appendChild(a);
119 a.appendChild(b);
120 org.w3c.dom.Element x2 = doc.createElementNS("", "x");
121 org.w3c.dom.Element x3 = doc.createElementNS("", "x");
122 org.w3c.dom.Element x4 = doc.createElementNS("", "x");
123 a.appendChild(x4);
124 b.appendChild(x2);
125 b.appendChild(x3);
126 x2.appendChild(doc.createTextNode("2"));
127 x3.appendChild(doc.createTextNode("3"));
128 x4.appendChild(doc.createTextNode("4"));
129
130 xpath.selectNodes(doc);
131 fail("last() function took arguments");
132 }
133 catch (FunctionCallException e)
134 {
135 assertEquals("last() requires no arguments.", e.getMessage());
136 }
137 }
138
139
140
141
142 }