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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 BooleanTest 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 BooleanTest(String name) {
82 super(name);
83 }
84
85
86 public void testNonEmptyNodeSetsAreTrue()
87 throws JaxenException {
88
89 BaseXPath xpath = new DOMXPath("boolean(//x)");
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("false"));
101 x3.appendChild(doc.createTextNode("false"));
102 x4.appendChild(doc.createTextNode("false"));
103
104 List result = xpath.selectNodes(doc);
105 assertEquals(1, result.size());
106 assertEquals(Boolean.TRUE, result.get(0));
107
108 }
109
110 public void testEmptyNodeSetsAreFalse()
111 throws JaxenException {
112
113 BaseXPath xpath = new DOMXPath("boolean(//y)");
114 org.w3c.dom.Element a = doc.createElementNS("", "a");
115 org.w3c.dom.Element b = doc.createElementNS("", "b");
116 doc.appendChild(a);
117 a.appendChild(b);
118 org.w3c.dom.Element x2 = doc.createElementNS("", "x");
119 org.w3c.dom.Element x3 = doc.createElementNS("", "x");
120 org.w3c.dom.Element x4 = doc.createElementNS("", "x");
121 a.appendChild(x4);
122 b.appendChild(x2);
123 b.appendChild(x3);
124 x2.appendChild(doc.createTextNode("false"));
125 x3.appendChild(doc.createTextNode("false"));
126 x4.appendChild(doc.createTextNode("false"));
127
128 List result = xpath.selectNodes(doc);
129 assertEquals(1, result.size());
130 assertEquals(Boolean.FALSE, result.get(0));
131
132 }
133
134 public void testZeroIsFalse()
135 throws JaxenException {
136
137 BaseXPath xpath = new DOMXPath("boolean(0)");
138 org.w3c.dom.Element a = doc.createElementNS("", "a");
139
140 List result = xpath.selectNodes(a);
141 assertEquals(1, result.size());
142 assertEquals(Boolean.FALSE, result.get(0));
143
144 }
145
146 public void testEmptyStringIsFalse()
147 throws JaxenException {
148
149 BaseXPath xpath = new DOMXPath("boolean('')");
150 org.w3c.dom.Element a = doc.createElementNS("", "a");
151
152 List result = xpath.selectNodes(a);
153 assertEquals(1, result.size());
154 assertEquals(Boolean.FALSE, result.get(0));
155
156 }
157
158 public void testNaNIsFalse()
159 throws JaxenException {
160
161 BaseXPath xpath = new DOMXPath("boolean(0 div 0)");
162 Object result = xpath.evaluate(null);
163 assertEquals(Boolean.FALSE, result);
164
165 }
166
167 public void testNonEmptyStringIsTrue()
168 throws JaxenException {
169
170 BaseXPath xpath = new DOMXPath("boolean('false')");
171 org.w3c.dom.Element a = doc.createElementNS("", "a");
172
173 List result = xpath.selectNodes(a);
174 assertEquals(1, result.size());
175 assertEquals(Boolean.TRUE, result.get(0));
176
177 }
178
179 public void testBooleanFunctionRequiresOneArgument()
180 throws JaxenException {
181
182 BaseXPath xpath = new DOMXPath("boolean()");
183 org.w3c.dom.Element a = doc.createElementNS("", "a");
184
185 try {
186 xpath.selectNodes(a);
187 fail("Allowed boolean function with no arguments");
188 }
189 catch (FunctionCallException ex) {
190 assertNotNull(ex.getMessage());
191 }
192
193 }
194
195 public void testBooleanFunctionRequiresExactlyOneArgument()
196 throws JaxenException {
197
198 BaseXPath xpath = new DOMXPath("boolean('', '')");
199 org.w3c.dom.Element a = doc.createElementNS("", "a");
200
201 try {
202 xpath.selectNodes(a);
203 fail("Allowed boolean function with two arguments");
204 }
205 catch (FunctionCallException ex) {
206 assertNotNull(ex.getMessage());
207 }
208
209 }
210
211 }