assertEquals("EXAMPLE.COM", auth.getUserDomain());
        }

        @Test
        @DisplayName("getUserDomain: explicit realm overrides")
        void getUserDomain_fromExplicitRealm() {
            Kerb5Authenticator auth = new Kerb5Authenticator(new Subject());
            auth.setRealm("REALM.TEST");
            assertEquals("REALM.TEST", auth.getUserDomain());
        }

        @Test

    void testGetUserDomain() {
        // Given
        String domain = "TESTDOMAIN";
        when(mockCredentials.getUserDomain()).thenReturn(domain);

        // When
        String result = mockCredentials.getUserDomain();

        // Then
        assertEquals(domain, result);
        verify(mockCredentials).getUserDomain();
    }

    @Test
    @DisplayName("Should check for anonymous credentials")
    void testIsAnonymous() {

        // Act
        TestCredentials copy = creds.clone();

        // Assert
        assertNotSame(creds, copy, "clone must return a new instance");
        assertEquals(creds.getUserDomain(), copy.getUserDomain());
        assertEquals(creds.isAnonymous(), copy.isAnonymous());
        assertEquals(creds.isGuest(), copy.isGuest());
        assertSame(subject, copy.getSubject(), "subject is the same reference in clone");

     */
    <T extends Credentials> T unwrap(Class<T> type);

    /**
     * Get the domain of the user account.
     * @return the domain the user account is in
     */
    String getUserDomain();

    /**
     * Check if these are anonymous credentials.
     * @return whether these are anonymous credentials
     */
    boolean isAnonymous();

    /**
     * Check if these are guest credentials.

    private Map<String, Map<String, CacheEntry<DfsReferralDataInternal>>> getTrustedDomains(final CIFSContext tf) throws SmbAuthException {
        if (tf.getConfig().isDfsDisabled() || tf.getCredentials().getUserDomain() == null
                || tf.getCredentials().getUserDomain().isEmpty()) {
            return null;
        }

        if (this._domains != null && System.currentTimeMillis() > this._domains.expiration) {
            this._domains = null;

     */
    @Override
    public boolean equals(Object obj) {
        if (obj instanceof NtlmPasswordAuthenticator ntlm) {
            String domA = ntlm.getUserDomain() != null ? ntlm.getUserDomain().toUpperCase() : null;
            String domB = this.getUserDomain() != null ? this.getUserDomain().toUpperCase() : null;
            return ntlm.type == this.type && Objects.equals(domA, domB) && ntlm.getUsername().equalsIgnoreCase(this.getUsername())

        }

        @Override
        public boolean isAnonymous() {
            return false; // not anonymous for test purposes
        }

        @Override
        public String getUserDomain() {
            return "TESTDOMAIN"; // test domain for test purposes
        }

        @Override
        public <T extends Credentials> T unwrap(Class<T> type) {
            if (type.isInstance(this)) {

     * {@inheritDoc}
     *
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        return super.hashCode();
    }

    @Override
    public String getUserDomain() {
        if (this.realm == null && this.getSubject() != null) {
            Set<Principal> pr = this.getSubject().getPrincipals();
            for (Iterator<Principal> ite = pr.iterator(); ite.hasNext();) {

        NtlmPasswordAuthenticator cloned = original.clone();

        // Verify cloned values
        assertEquals(original.getUserDomain(), cloned.getUserDomain());
        assertEquals(original.getUsername(), cloned.getUsername());
        assertEquals(original.getPassword(), cloned.getPassword());

        // Verify password arrays are independent

     */
    public synchronized SmbTreeHandleImpl connectHost(final SmbResourceLocatorImpl loc, String host, final DfsReferralData referral)
            throws IOException {
        String targetDomain = ctx.getCredentials().getUserDomain();
        try (SmbTreeImpl t = getTree()) {
            if (t != null) {
                if (log.isDebugEnabled()) {
                    log.debug("Tree is " + t);
                }