@DisplayName("getUserDomain: derives from KerberosPrincipal in Subject")
        void getUserDomain_fromSubjectPrincipal() {
            Subject subject = new Subject();
            Principal kp = new KerberosPrincipal("******@****.***");
            subject.getPrincipals().add(kp);

            Kerb5Authenticator auth = new Kerb5Authenticator(subject);
            assertEquals("EXAMPLE.COM", auth.getUserDomain());
        }

        // Test the cloning behavior with both null and non-null cached subjects
        if (first != null) {
            // If we got a valid subject, test that it's properly cached and cloned
            Subject cachedOrig = orig.getSubject();
            assertNotNull(cachedOrig);

            // Cached subject is copied and visible via getSubject()
            Subject copySubj = copy.getSubject();
            assertNotNull(copySubj);

        lc.login();
        this.subject = lc.getSubject();
    }

    /**
     * Retrieves all Kerberos keys from the authenticated subject.
     *
     * @return array of KerberosKey objects
     */
    public KerberosKey[] getKeys() {
        List<Key> serverKeys = new ArrayList<>();

        Set<Object> serverPrivateCredentials = this.subject.getPrivateCredentials();

            throw new SmbException("Context setup failed", e);
        }
    }

    /**
     * Set the Kerberos subject
     *
     * @param subject
     *            the subject to set
     */
    protected void setSubject(Subject subject) {
        this.subject = subject;
    }

    @Override
    public void refresh() throws CIFSException {

        private final boolean guest;
        private final Subject subject;
        private final boolean failOnRefresh;

        TestCredentials(String domain, boolean anonymous, boolean guest, Subject subject, boolean failOnRefresh) {
            this.domain = domain;
            this.anonymous = anonymous;
            this.guest = guest;
            this.subject = subject;
            this.failOnRefresh = failOnRefresh;
        }

import org.mockito.MockitoAnnotations;

/**
 * Test class for KerberosCredentials.
 */
class KerberosCredentialsTest {

    @Mock
    private LoginContext loginContext;

    @Mock
    private Subject subject;

    @Mock
    private KerberosKey key1;

    @Mock
    private KerberosKey key2;

    private static final String LOGIN_CONTEXT_NAME = "TestLoginContext";
    private static final int KEY_TYPE_1 = 1;

     * @param tdom
     * @param thost
     * @return
     */
    protected boolean matches(CIFSContext tf, String thost, String tdom) {
        return Objects.equals(this.getCredentials(), tf.getCredentials()) && Objects.equals(this.targetHost, thost)
                && Objects.equals(this.targetDomain, tdom);
    }

    }

    /**
     * Processes default log events (no specific handling).
     *
     * @param objs the log objects
     */
    protected void processDefault(final Object... objs) {
    }

    /**
     * Processes system error log events.
     *
     * @param objs the log objects (should contain a Throwable)
     */
    protected void processSystemError(final Object... objs) {

        return Objects.equals(modelName, other.modelName) && Objects.equals(featureSetName, other.featureSetName)
                && Objects.equals(storeName, other.storeName) && Objects.equals(params, other.params)
                && Objects.equals(activeFeatures, other.activeFeatures);
    }

    @Override
    protected int doHashCode() {

            }
            lc.login();

            Subject s = lc.getSubject();
            if (log.isDebugEnabled()) {
                log.debug("Got subject: " + s.getPrincipals());
            }
            if (log.isTraceEnabled()) {
                log.trace("Got subject " + s);
            }

            this.cachedSubject = s;
            return this.cachedSubject;