public TestTermVectorsReader(String s) 
{
     
    super(s);
}

 protected  void setUp() 
{
    for (int i = 0; i <  testFields.length; i++) {
      fieldInfos.add(testFields[i], true, true);
    }
    try {
      Arrays.sort(testTerms);
      for (int j = 0; j <  5; j++) {
        writer = new TermVectorsWriter(dir, seg, fieldInfos);
        writer.openDocument();
        for (int k = 0; k <  testFields.length; k++) {
          writer.openField(testFields[k]);
          for (int i = 0; i <  testTerms.length; i++) {
            writer.addTerm(testTerms[i], i);      
          }
          writer.closeField();
        }
        writer.closeDocument();
        writer.close();
      }
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
}

 protected  void tearDown() 
{

}

 public  void test() 
{
      //Check to see the files were created properly in setup
      assertTrue(writer.isDocumentOpen() == false);          
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVD_EXTENSION));
      assertTrue(dir.fileExists(seg + TermVectorsWriter.TVX_EXTENSION));
}

 public  void testBadParams() 
{
    try {
      TermVectorsReader reader = new TermVectorsReader(dir, seg, fieldInfos);
      assertTrue(reader != null);
      //Bad document number, good field number
      TermFreqVector vector = reader.get(50, testFields[0]);
      assertTrue(vector == null);      
    } catch (Exception e) {
      assertTrue(false);
    }
    try {
      TermVectorsReader reader = new TermVectorsReader(dir, seg, fieldInfos);
      assertTrue(reader != null);
      //good document number, bad field number
      TermFreqVector vector = reader.get(0, "f50");
      assertTrue(vector == null);      
    } catch (Exception e) {
      assertTrue(false);
    }
}

Make sure exceptions and bad params are handled appropriately

 public  void testReader() 
{
    try {
      TermVectorsReader reader = new TermVectorsReader(dir, seg, fieldInfos);
      assertTrue(reader != null);
      TermFreqVector vector = reader.get(0, testFields[0]);
      assertTrue(vector != null);
      String [] terms = vector.getTerms();
      assertTrue(terms != null);
      assertTrue(terms.length == testTerms.length);
      for (int i = 0; i <  terms.length; i++) {
        String term = terms[i];
        //System.out.println("Term: " + term);
        assertTrue(term.equals(testTerms[i]));
      }
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    }
}