counttest.java

XML的解析、编译、查询等技术的JAVA源代码。

/*
 * $Header$
 * $Revision$
 * $Date$
 *
 * ====================================================================
 *
 * Copyright 2000-2002 bob mcwhirter & James Strachan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 * 
 *   * 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,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * 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.io.IOException;

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

import junit.framework.TestCase;

import org.jaxen.BaseXPath;
import org.jaxen.FunctionCallException;
import org.jaxen.JaxenException;
import org.jaxen.XPath;
import org.jaxen.dom.DOMXPath;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

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

    private Document doc;
    
    public void setUp() throws ParserConfigurationException, SAXException, IOException
    {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);
        DocumentBuilder builder = factory.newDocumentBuilder();
        doc = builder.parse( "xml/basic.xml" );
    }


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

    public void testCount3()
    {
        try
        {
            XPath xpath = new DOMXPath( "count(3)" );
            xpath.selectNodes( doc );
            fail("Allowed count of number");
       }
       catch (FunctionCallException e) 
        {
           assertEquals("count() function can only be used for node-sets", e.getMessage());
        }
       catch (Exception e)
        {
            e.printStackTrace();
            fail( e.getMessage() );
        }
    }    
    
    public void testCountFunctionRequiresAtLeastOneArgument() 
      throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("count()");
        
        try {
            xpath.selectNodes(doc);
            fail("Allowed count function with no arguments");
        }
        catch (FunctionCallException ex) {
            assertNotNull(ex.getMessage());
        }
        
    }    

    public void testCountFunctionRequiresAtMostOneArgument() 
      throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("count(/*, /@*)");
        
        try {
            xpath.selectNodes(doc);
            fail("Allowed count function with two arguments");
        }
        catch (FunctionCallException ex) {
            assertNotNull(ex.getMessage());
        }
        
    } 
    
    public void testCountRootElement() 
      throws JaxenException {
        
        BaseXPath xpath = new DOMXPath("count(/*)");
        Double result = (Double) xpath.evaluate(doc);
        assertEquals(1.0, result.doubleValue(), 0.00001);
        
    }  
    
    
}