UTestXPathFactory.java

package org.tigris.juxy.xpath;

import junit.framework.TestCase;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathFactoryConfigurationException;
import javax.xml.xpath.XPathFunctionResolver;
import javax.xml.xpath.XPathVariableResolver;

/**
 * $Id: UTestXPathFactory.java,v 1.5 2006-10-31 11:01:24 pavelsher Exp $
 *
 * @author Pavel Sher
 */
public class UTestXPathFactory extends TestCase {
  protected void tearDown() throws Exception {
    XPathFactory.reset();
  }

  public void testCreateXPathWithEmptyExpression() {
    try {
      XPathFactory.newXPath("");
      fail("An exception expected");
    } catch (IllegalArgumentException e) {
    }
  }

  public void testCreateJaxenXPath() {
    XPathExpr xpath = XPathFactory.createJaxenXPath("/");
    assertTrue(xpath instanceof JaxenXPathExpr);
  }

  public void testCreateJavaXPath() {
    XPathExpr xpath = XPathFactory.createJavaxXPath("/");
    assertTrue(xpath instanceof JavaxXPathExpr);
  }

  public void testFailedToCreateJavaxXPath() {
    String factoryProperty = "javax.xml.xpath.XPathFactory:" + javax.xml.xpath.XPathConstants.DOM_OBJECT_MODEL;
    System.setProperty(factoryProperty, FakeXPathFactory.class.getName());

    XPathExpr xpath = XPathFactory.newXPath("/");
    assertTrue(xpath instanceof JaxenXPathExpr);

    System.setProperty(factoryProperty, "");
  }

  public static class FakeXPathFactory extends javax.xml.xpath.XPathFactory {
    public boolean isObjectModelSupported(String objectModel) {
      return false;
    }

    public void setFeature(String name, boolean value) throws XPathFactoryConfigurationException {
    }

    public boolean getFeature(String name) throws XPathFactoryConfigurationException {
      return false;
    }

    public void setXPathVariableResolver(XPathVariableResolver resolver) {
    }

    public void setXPathFunctionResolver(XPathFunctionResolver resolver) {
    }

    public XPath newXPath() {
      throw new RuntimeException("not supported xpath");
    }
  }
}