content: /*
   * Copyright (c) 2013 3 Round Stones Inc., Some Rights Reserved
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  package org.callimachusproject.engine.helpers;
  
  import java.io.StringReader;
  import java.io.StringWriter;
  
  import javax.xml.stream.XMLEventReader;
  import javax.xml.stream.XMLEventWriter;
  import javax.xml.stream.XMLInputFactory;
  import javax.xml.stream.XMLOutputFactory;
  
  import junit.framework.TestCase;
  
  public class XMLElementReaderTest extends TestCase {
  	private XMLInputFactory xif = XMLInputFactory.newInstance();
  	private XMLOutputFactory xof = XMLOutputFactory.newInstance();
  
  	public String extract(String xptr, String xml) throws Exception {
  		XMLEventReader input = xif.createXMLEventReader(new StringReader(xml));
  		XMLEventReader output = new XMLElementReader(input, xptr);
  		StringWriter out = new StringWriter();
  		XMLEventWriter writer = xof.createXMLEventWriter(out);
  		writer.add(output);
  		writer.close();
  		return out.toString();
  	}
  
  	public void testRootPath() throws Exception {
  		assertEquals(
  				"<?xml version=\"1.0\"?><root><child id=\"child\"><leaf></leaf></child></root>",
  				extract("/1",
  						"<?xml version=\"1.0\"?><root><child id=\"child\"><leaf></leaf></child></root>"));
  	}
  
  	public void testPath() throws Exception {
  		assertEquals(
  				"<?xml version=\"1.0\"?><child id=\"child\"><leaf></leaf></child>",
  				extract("/1/1",
  						"<?xml version=\"1.0\"?><root><child id=\"child\"><leaf></leaf></child></root>"));
  	}
  
  	public void testId() throws Exception {
  		assertEquals(
  				"<?xml version=\"1.0\"?><child id=\"child\"><leaf></leaf></child>",
  				extract("child",
  						"<?xml version=\"1.0\"?><root><child id=\"child\"><leaf></leaf></child></root>"));
  	}
  
  	public void testIdPath() throws Exception {
  		assertEquals(
  				"<?xml version=\"1.0\"?><leaf></leaf>",
  				extract("child/1",
  						"<?xml version=\"1.0\"?><root><child id=\"child\"><leaf></leaf></child></root>"));
  	}
  }
  