code: /**
   * Copyright 2012 Lezan Hawizy, David M. Jessop, Daniel Lowe and Peter Murray-Rust
   *
   * 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 uk.ac.cam.ch.wwmm.chemicaltagger;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.junit.Assert;
  import nu.xom.Document;
  
  import org.antlr.v4.runtime.tree.Tree;
  import org.apache.commons.io.IOUtils;
  import org.junit.Test;
  
  /*****************************
   * Passes Tagged Sentences to the antlr chunker. Then checks the output of the
   * AST tree using the checkNodes(astTree) module.
   * 
   * @author lh359, dl387
   *****************************/
  
  public class ChemistrySentenceParserTest {
  
  	@Test
  	public void testSentence1() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence1.txt");
  
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence2() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence2.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence3() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence3.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence4() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence4.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence5() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence5.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence6() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence6.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence7() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence7.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testSentence8() throws IOException {
  		String input = Utils.readSentence("uk/ac/cam/ch/wwmm/chemicaltagger/sentenceParserTest/sentence8.txt");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(input);
  		chemChunkParser.parseTags();
  		Tree t = chemChunkParser.getParseTree();
  		UtilityMethods.checkForErrorNodes(t);
  		UtilityMethods.checkTreeText(t, input);
  	}
  
  	@Test
  	public void testEmptyInput() {
  		InputStream in = IOUtils.toInputStream("");
  		ChemistrySentenceParser chemChunkParser = new ChemistrySentenceParser(in);
  		chemChunkParser.parseTags();
  		Document doc = chemChunkParser.makeXMLDocument();
          Assert.assertEquals("Document should be empty", 0, doc.getRootElement().getChildElements().size());
  
  	}
  
  }
  