@BeforeEach
    void setUp() throws CIFSException {
        // Setup mock configuration with required methods
        when(mockConfig.getDefaultUsername()).thenReturn(null);
        when(mockConfig.getDefaultPassword()).thenReturn(null);
        when(mockConfig.getDefaultDomain()).thenReturn(null);
        when(mockConfig.getBufferCacheSize()).thenReturn(16);
        when(mockConfig.getMaximumBufferSize()).thenReturn(65536);

        return this.delegate.getDefaultUsername();
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Configuration#getDefaultPassword()
     */
    @Override
    public String getDefaultPassword() {
        return this.delegate.getDefaultPassword();
    }

    /**
     *
     * @see jcifs.Configuration#isDisablePlainTextPasswords()
     */
    @Override

        when(mockDelegate.getDefaultDomain()).thenReturn("WORKGROUP");
        when(mockDelegate.getDefaultUsername()).thenReturn("testuser");
        when(mockDelegate.getDefaultPassword()).thenReturn("testpass");
        when(mockDelegate.getNativeLanman()).thenReturn("jCIFS");

        // When
        String oemEncoding = delegatingConfig.getOemEncoding();

    void testConfigurationCreation() throws CIFSException {
        // Then
        assertNotNull(config);
        assertEquals("testuser", config.getDefaultUsername());
        assertEquals("testpass", config.getDefaultPassword());
        assertEquals("testdomain", config.getDefaultDomain());
    }

    @Test
    @DisplayName("Should handle null properties gracefully")
    void testNullProperties() throws CIFSException {

        final String domain = getDefaultDomain();
        setDomain(domain);
        final String user = getDefaultUser();
        setUser(user);
        final String password = getDefaultPassword();
        switch (LM_COMPATIBILITY) {
        case 0:
        case 1:
            setLMResponse(getLMResponse(type2, password));
            setNTResponse(getNTResponse(type2, password));
            break;

            }
        } else {
            String domain = DEFAULT_DOMAIN;
            String user = Type3Message.getDefaultUser();
            String password = Type3Message.getDefaultPassword();
            String userInfo = url.getUserInfo();
            if (userInfo != null) {
                userInfo = URLDecoder.decode(userInfo);
                int index = userInfo.indexOf(':');

    void testAuthenticationConfigurationGetters() {
        assertNull(config.getDefaultDomain());
        assertNull(config.getDefaultUsername());
        assertNull(config.getDefaultPassword());
        assertTrue(config.isDisablePlainTextPasswords());
        assertEquals(3, config.getLanManCompatibility());
        assertTrue(config.isAllowNTLMFallback());
        assertFalse(config.isUseRawNTLM());

     */
    String getDefaultUsername();

    /**
     *
     * Property {@code jcifs.smb.client.password}
     *
     * @return default credentials, password
     */
    String getDefaultPassword();

    /**
     * Lanman compatibility level
     *
     * <a href="https://technet.microsoft.com/en-us/library/cc960646.aspx">Microsoft TechNet Documentation</a>
     *
     *
     * <table>

        return this.defaultDomain;
    }

    @Override
    public String getDefaultUsername() {
        return this.defaultUserName;
    }

    @Override
    public String getDefaultPassword() {
        return this.defaultPassword;
    }

    @Override
    public boolean isDisablePlainTextPasswords() {
        return this.disablePlainTextPasswords;
    }

    @Override