### Question:
LDAPUtils { public static boolean isDN(String candidateDN) { return isDN(candidateDN, 0); } private  LDAPUtils(); static ConnectionFactory newPrioritizedFailoverConnectionPool(Set<String> servers,
            String hostServerId,
            String hostSiteId,
            String username,
            char[] password,
            int maxSize,
            int heartBeatInterval,
            String heartBeatTimeUnit,
            Options ldapOptions); static ConnectionFactory newFailoverConnectionPool(Set<LDAPURL> servers,
            String username,
            char[] password,
            int maxSize,
            int heartBeatInterval,
            String heartBeatTimeUnit,
            Options ldapOptions); static ConnectionFactory newPrioritizedFailoverConnectionFactory(Set<String> servers,
            String hostServerId,
            String hostSiteId,
            String username,
            char[] password,
            int heartBeatInterval,
            String heartBeatTimeUnit,
            Options options); static ConnectionFactory newFailoverConnectionFactory(Set<LDAPURL> servers,
            String username,
            char[] password,
            int heartBeatInterval,
            String heartBeatTimeUnit,
            Options ldapOptions); static Set<LDAPURL> prioritizeServers(Set<String> servers, String hostServerId, String hostSiteId); static SearchScope getSearchScope(String scope, SearchScope defaultScope); static Filter parseFilter(String filter, Filter defaultFilter); static String getName(DN dn); static void addAttributeToMapAsByteArray(Attribute attribute, Map<String, byte[][]> map); static void addAttributeToMapAsString(Attribute attribute, Map<String, Set<String>> map); static Set<String> getAttributeValuesAsStringSet(Attribute attribute); static Set<LDAPURL> convertToLDAPURLs(Set<String> servers); static String rdnValueFromDn(String dn); static String rdnValueFromDn(DN dn); static String rdnValue(RDN rdn); static String rdnTypeFromDn(String dn); static String rdnTypeFromDn(DN dn); static String rdnType(RDN rdn); static Set<String> collectNonIdenticalValues(DN compare, Set<String> dns); static String getDBName(String suffix, Connection ld); static boolean isDN(String candidateDN); static boolean isDN(String candidateDN, int minNumComponent); static String escapeValue(String str); static String unescapeValue(String str); static String normalizeDN(String dn); static DN newDN(String orgName); static String formatToRFC(String dn); static boolean dnEquals(String dn1, String dn2); static ConnectionFactory createFailoverConnectionFactory(String host, int defaultPort,
            String authDN, String authPasswd, Options options);  }### Answer:
@Test public void testIsDN() throws Exception { String candidateDN = "dc=forgerock"; boolean validationResult = LDAPUtils.isDN(candidateDN); assertThat(validationResult).isTrue(); }
@Test public void testIsDNInvalid() throws Exception { String candidateDN = "dc=forgerock,dc"; boolean validationResult = LDAPUtils.isDN(candidateDN); assertThat(validationResult).isFalse(); }