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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.BaseXPath;
71 import org.jaxen.FunctionCallException;
72 import org.jaxen.JaxenException;
73 import org.jaxen.XPath;
74 import org.jaxen.dom.DOMXPath;
75 import org.w3c.dom.Document;
76
77 /***
78 * @author Elliotte Rusty Harold
79 *
80 */
81 public class StringLengthTest extends TestCase {
82
83 private Document doc;
84
85 public void setUp() throws ParserConfigurationException
86 {
87 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
88 factory.setNamespaceAware(true);
89 DocumentBuilder builder = factory.newDocumentBuilder();
90 doc = builder.newDocument();
91 doc.appendChild(doc.createElement("root"));
92 }
93
94
95 public StringLengthTest(String name) {
96 super(name);
97 }
98
99 public void testStringLengthOfNumber() throws JaxenException
100 {
101 XPath xpath = new DOMXPath( "string-length(3)" );
102 Double result = (Double) xpath.evaluate( doc );
103 assertEquals(1, result.intValue());
104 }
105
106 public void testStringLengthOfEmptyString() throws JaxenException
107 {
108 XPath xpath = new DOMXPath( "string-length('')" );
109 Double result = (Double) xpath.evaluate( doc );
110 assertEquals(0, result.intValue());
111 }
112
113 public void testStringLengthOfString() throws JaxenException
114 {
115 XPath xpath = new DOMXPath( "string-length('0123456789')" );
116 Double result = (Double) xpath.evaluate( doc );
117 assertEquals(10, result.intValue());
118 }
119
120 public void testStringLengthFunctionOperatesOnContextNode()
121 throws JaxenException {
122
123 BaseXPath xpath = new DOMXPath("string-length()");
124 Double result = (Double) xpath.evaluate( doc );
125 assertEquals(0, result.intValue());
126
127 }
128
129 public void testStringLengthFunctionCountsUnicodeCharactersNotJavaChars()
130 throws JaxenException {
131
132 BaseXPath xpath = new DOMXPath("string-length('\uD834\uDD00')");
133 Double result = (Double) xpath.evaluate( doc );
134 assertEquals(1, result.intValue());
135
136 }
137
138 public void testStringLengthFunctionWithMalformedString()
139 throws JaxenException {
140
141 BaseXPath xpath = new DOMXPath("string-length('\uD834A\uDD00')");
142 try {
143 xpath.evaluate( doc );
144 fail("Allowed Malformed string");
145 }
146 catch (FunctionCallException ex) {
147 assertNotNull(ex.getMessage());
148 }
149
150 }
151
152 public void testStringLengthFunctionRequiresExactlyOneArgument()
153 throws JaxenException {
154
155 BaseXPath xpath = new DOMXPath("string-length('', '')");
156
157 try {
158 xpath.selectNodes(doc);
159 fail("Allowed string-length function with two arguments");
160 }
161 catch (FunctionCallException ex) {
162 assertNotNull(ex.getMessage());
163 }
164
165 }
166
167 }