@Test
  public void testIncorrectFilterString() throws IOException {
    String filterString = "()";
    byte[] filterStringAsByteArray = Bytes.toBytes(filterString);
    try {
      filter = f.parseFilterString(filterStringAsByteArray);
      assertTrue(false);
    } catch (IllegalArgumentException e) {
      System.out.println(e.getMessage());
    }
  }
This class tests ParseFilter.java It tests the entire work flow from when a string is given by
the user and how it is parsed to construct the corresponding Filter object
hbase-server/src/test/java/org/apache/hadoop/hbase/filter/TestParseFilter.java