}

    @Test
    @DisplayName("Test Response interface methods - setExpiration")
    void testSetExpiration() {
        // Given
        Long expiration = System.currentTimeMillis() + 60000L;
        doNothing().when(response).setExpiration(expiration);

        // When
        response.setExpiration(expiration);

        // Then
        verify(response).setExpiration(expiration);

        when(mockResponse.getExpiration()).thenReturn(expiration);
        assertEquals(expiration, mockResponse.getExpiration());

        // Test null expiration
        when(mockResponse.getExpiration()).thenReturn(null);
        assertNull(mockResponse.getExpiration());

        // Verify the method was called
        verify(mockResponse, times(2)).getExpiration();
    }

    @Test

        // Given
        long expiration = System.currentTimeMillis();
        when(mockReferralData.getExpiration()).thenReturn(expiration);

        // When
        long result = mockReferralData.getExpiration();

        // Then
        assertEquals(expiration, result);
        verify(mockReferralData).getExpiration();
    }

    @Test
    @DisplayName("Should get next referral")
    void testNext() {

            Long expiration = 1000L;
            echoResponse.setExpiration(expiration);
            assertEquals(expiration, echoResponse.getExpiration());

            echoResponse.setExpiration(null);

            assertNull(echoResponse.getExpiration());
        }
    }

    @Nested
    @DisplayName("Signature Verification Tests")
    class SignatureVerificationTests {

        @Test

            // Test with mock
            when(mockReferralData.getExpiration()).thenReturn(expiration);
            assertEquals(expiration, mockReferralData.getExpiration());
            verify(mockReferralData, times(1)).getExpiration();

            // Test with concrete implementation
            long concreteExpiration = concreteImplementation.getExpiration();
            assertTrue(concreteExpiration >= 0);
        }

            assertEquals("share2", combined.getShare());
            assertEquals("path2", combined.getPath());
            assertEquals("DOMAIN", combined.getDomain());
            assertEquals(second.getExpiration(), combined.getExpiration());

            // Path consumed should be combined
            int expectedPathConsumed = 20 + 15;
            if (first.getPath() != null) {

    }

    @Test
    @DisplayName("getExpiration: null when unset, value when positive")
    void testGetExpiration() {
        SmbSessionImpl session = newSession();
        assertNull(session.getExpiration());
        setField(session, "expiration", 123L);
        assertEquals(123L, session.getExpiration());
        setField(session, "expiration", 0L);
        assertNull(session.getExpiration());
    }

    @Test

    /**
     * Gets the expiration time for this response.
     *
     * @return the message timeout
     */
    Long getExpiration();

    /**
     * Sets the expiration time for this response.
     *
     * @param exp the message timeout to set
     */
    void setExpiration(Long exp);

    /**
     * Resets this response to its initial state.
     */
    void reset();

    /**

     * {@inheritDoc}
     *
     * @see jcifs.util.transport.Response#getExpiration()
     */
    @Override
    public Long getExpiration() {
        return this.expiration;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.util.transport.Response#setExpiration(java.lang.Long)
     */
    @Override
    public void setExpiration(final Long exp) {
        this.expiration = exp;
    }

     */
    String getPath();

    /**
     * Get the expiration time of this referral entry
     *
     * @return the expiration time of this entry
     */
    long getExpiration();

    /**
     * Get the next referral in the chain
     *
     * @return pointer to next referral, points to self if there is no further referral
     */
    DfsReferralData next();

    /**