stringtest.java

XML的解析、编译、查询等技术的JAVA源代码。

/*
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 *
 * ====================================================================
 *
 * Copyright 2005 Elliotte Rusty Harold
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
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 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
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 *   * Redistributions in binary form must reproduce the above copyright
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 *   * Neither the name of the Jaxen Project nor the names of its
 *     contributors may be used to endorse or promote products derived 
 *     from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ====================================================================
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Jaxen Project and was originally 
 * created by bob mcwhirter <[e-mail]> and 
 * James Strachan <[e-mail]>.  For more information on the 
 * Jaxen Project, please see <http://www.jaxen.org/>.
 * 
 * $Id$
 */

package org.jaxen.test;

import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import junit.framework.TestCase;

import org.jaxen.FunctionCallException;
import org.jaxen.JaxenException;
import org.jaxen.XPath;
import org.jaxen.dom.DOMXPath;
import org.jaxen.dom.DocumentNavigator;
import org.jaxen.function.StringFunction;
import org.w3c.dom.Document;

/**
 * @author Elliotte Rusty Harold
 *
 */
public class StringTest extends TestCase {

    private Document doc;
    
    public void setUp() throws ParserConfigurationException
    {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);
        DocumentBuilder builder = factory.newDocumentBuilder();
        doc = builder.newDocument();
    }


    public StringTest(String name) {
        super(name);
    }

    // test case for JAXEN-55
    public void testStringFunctionOperatesOnFirstNodeInDocumentOrder() 
      throws JaxenException {
        
        XPath xpath = new DOMXPath("string(//x)");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        org.w3c.dom.Element b = doc.createElementNS("", "b");
        doc.appendChild(a);
        a.appendChild(b);
        org.w3c.dom.Element x2 = doc.createElementNS("", "x");
        org.w3c.dom.Element x3 = doc.createElementNS("", "x");
        org.w3c.dom.Element x4 = doc.createElementNS("", "x");
        a.appendChild(x4);
        b.appendChild(x2);
        b.appendChild(x3);
        x2.appendChild(doc.createTextNode("2"));
        x3.appendChild(doc.createTextNode("3"));
        x4.appendChild(doc.createTextNode("4"));
        
        List result = xpath.selectNodes(doc);
        assertEquals(1, result.size());
        assertEquals("2", result.get(0));
        
    }
    
    public void testStringValueOfComment() 
      throws JaxenException {
        
        XPath xpath = new DOMXPath("string(/a/comment())");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        doc.appendChild(a);
        a.appendChild(doc.createComment("data"));
        
        String result = (String) xpath.evaluate(doc);
        assertEquals("data", result);
        
    }
    
    public void testStringValueOfNull() {
        assertEquals("", StringFunction.evaluate(null, null));
    }
    
    public void testStringValueOfNullWithNonNullNavigator() {
        assertEquals("", StringFunction.evaluate(null, new DocumentNavigator()));
    }
    
    public void testStringValueOfNamespaceNode() 
      throws JaxenException {
        
        XPath xpath = new DOMXPath("string(/a/namespace::node())");
        org.w3c.dom.Element a = doc.createElementNS("", "a");
        doc.appendChild(a);
        
        String result = (String) xpath.evaluate(doc);
        assertEquals("http://www.w3.org/XML/1998/namespace", result);
        
    }
    
    public void testSmallNumbersDontUseExponentialNotation() throws JaxenException {
        XPath xpath = new DOMXPath("string(0.0000003)");
        String result = (String) xpath.evaluate(null);
        assertEquals("0.0000003", result);
    }

    public void testBigNumbersDontUseExponentialNotation() throws JaxenException {
        XPath xpath = new DOMXPath("string(100000000.5)");
        String result = (String) xpath.evaluate(null);
        assertEquals("100000000.5", result);
    }

    public void testStringOfInfinity() throws JaxenException {
        XPath xpath = new DOMXPath("string(1 div 0)");
        String result = (String) xpath.evaluate(null);
        assertEquals("Infinity", result);
    }

    public void testStringOfNegativeInfinity() throws JaxenException {
        XPath xpath = new DOMXPath("string(-1 div 0)");
        String result = (String) xpath.evaluate(null);
        assertEquals("-Infinity", result);
    }

    public void testStringOfNegativeZero() throws JaxenException {
        XPath xpath = new DOMXPath("string(-0)");
        String result = (String) xpath.evaluate(null);
        assertEquals("0", result);
    }

    public void testIntegersAreFormattedAsInts() throws JaxenException {
        XPath xpath = new DOMXPath("string(12)");
        String result = (String) xpath.evaluate(null);
        assertEquals("12", result);
    } 

    public void testStringFunctionRequiresAtMostOneArgument() 
      throws JaxenException {
        
        XPath xpath = new DOMXPath("string('a', 1)");
        
        try {
            xpath.selectNodes(doc);
            fail("Allowed string function with two arguments");
        }
        catch (FunctionCallException ex) {
            assertNotNull(ex.getMessage());
        }
        
    }
}