### Question:
ValidationUtility { private static void validateRELS(PID pid, String dsId, InputStream content) throws ValidationException { logger.debug("Validating " + dsId + " datastream"); new RelsValidator().validate(pid, dsId, content); logger.debug(dsId + " datastream is valid"); }  static void validateURL(String url, String controlGroup); static void setPolicyParser(PolicyParser parser); static void setFeslPolicyParser(PolicyParser parser); static void setValidateFeslPolicy(boolean validate); static void validateReservedDatastreams(DOReader reader); static void validateReservedDatastream(PID pid,
                                                  String dsId,
                                                  Datastream ds);  }### Answer:
@Test(expected=ValidationException.class) public void testValidateRelsExtBad() throws ValidationException { validateRels("RELS-EXT", ""); }
@Test(expected=ValidationException.class) public void testValidateRelsIntBad() throws ValidationException { validateRels("RELS-INT", ""); }
@Test public void testValidateRelsExtGood() throws ValidationException { validateRels("RELS-EXT", RELSEXT_GOOD); }
@Test public void testValidateRelsIntGood() throws ValidationException { validateRels("RELS-INT", RELSINT_GOOD); }