@Override
  public Set<String> checkLdapAttributes(Map<String, Object> parameters, AmbariLdapConfiguration ldapConfiguration) throws AmbariLdapException {
    String userName = getTestUserNameFromParameters(parameters);
    String testUserPass = getTestUserPasswordFromParameters(parameters);

    if (null == userName) {
      throw new IllegalArgumentException("No test user available for testing LDAP attributes");
    }

    LOGGER.info("Testing LDAP user attributes with test user: {}", userName);
    String userDn = ldapConfigurationService.checkUserAttributes(userName, testUserPass, ldapConfiguration);

    // todo handle the case where group membership is stored in the user rather than the group
    LOGGER.info("Testing LDAP group attributes with test user dn: {}", userDn);
    return ldapConfigurationService.checkGroupAttributes(userDn, ldapConfiguration);
  }
Additional parameters expected to be provided along with the configuration
ambari-server/src/main/java/org/apache/ambari/server/ldap/service/AmbariLdapFacade.java