void testEmptyProperties() throws CIFSException {
        // Given
        Properties emptyProps = new Properties();

        // When
        PropertyConfiguration emptyConfig = new PropertyConfiguration(emptyProps);

        // Then
        assertNotNull(emptyConfig);
        // Hostname may be null when not provided in properties
        // This is expected behavior
    }

    @Test

            when(config.getPid()).thenReturn(12345);

            // When
            Constructor<SmbComNtCancel> constructor = SmbComNtCancel.class.getDeclaredConstructor(Configuration.class, int.class);
            constructor.setAccessible(true);
            SmbComNtCancel cancel = constructor.newInstance(config, mid);

            // Then
            assertNotNull(cancel);

        SmbPipeInputStream stream = newStreamWithMinimalStubs(true);

        when(handle.ensureOpen()).thenReturn(fd);
        when(fd.getTree()).thenReturn(tree);
        when(tree.isSMB2()).thenReturn(true);
        when(tree.getConfig()).thenReturn(config);
        when(config.getTransactionBufferSize()).thenReturn(65535);
        when(tree.send(any(Smb2IoctlRequest.class), eq(RequestParam.NO_RETRY))).thenThrow(new SmbException("boom"));

    void getFlags_allFalse() {
        when(gssContext.getCredDelegState()).thenReturn(false);
        when(gssContext.getMutualAuthState()).thenReturn(false);
        when(gssContext.getReplayDetState()).thenReturn(false);
        when(gssContext.getSequenceDetState()).thenReturn(false);
        when(gssContext.getAnonymityState()).thenReturn(false);
        when(gssContext.getConfState()).thenReturn(false);

    void testConstructorWithNullFilename() {
        // When & Then
        assertDoesNotThrow(() -> new Trans2GetDfsReferral(mockConfig, null));
    }

    @Test
    @DisplayName("Constructor should handle empty filename")
    void testConstructorWithEmptyFilename() {
        // When & Then
        assertDoesNotThrow(() -> new Trans2GetDfsReferral(mockConfig, ""));
    }

    @Test

    void isInUse_variants(boolean inUse) {
        when(session.isInUse()).thenReturn(inUse);

        boolean result = session.isInUse();

        assertEquals(inUse, result);
        verify(session, times(1)).isInUse();
    }

    // Happy path + edge: getSessionKey returns bytes, empty and null
    @Test
    @DisplayName("getSessionKey returns bytes, empty, then null")
    void getSessionKey_variants() throws CIFSException {

            when(mockChunk1.encode(any(byte[].class), anyInt())).thenReturn(CHUNK_SIZE);
            when(mockChunk2.encode(any(byte[].class), anyInt())).thenReturn(CHUNK_SIZE);

            SrvCopychunkCopy copy = new SrvCopychunkCopy(sourceKey, mockChunk1, mockChunk2);
            byte[] buffer = new byte[200];

            // When
            copy.encode(buffer, 0);

            // Then

        when(smbFileHandle.isValid()).thenReturn(true);
        assertTrue(smbFileHandle.isValid(), "isValid should return true when the handle is valid.");
        verify(smbFileHandle, times(1)).isValid();
    }

    /**
     * Test isValid() when the handle is invalid.
     */
    @Test
    void testIsValid_whenInvalid() {
        when(smbFileHandle.isValid()).thenReturn(false);

        }

        when(cifsContext.getTransportPool()).thenReturn(transportPool);
        when(cifsContext.getNameServiceClient()).thenReturn(nameServiceClient);
        lenient().when(cifsContext.getConfig()).thenReturn(configuration);
        lenient().when(configuration.getDefaultDomain()).thenReturn("TEST_DOMAIN");

        SmbResourceLocator context2 = mock(SmbResourceLocator.class);
        when(context2.getShare()).thenReturn("share");
        when(context2.getDfsReferral()).thenReturn(null);
        when(context2.getUNCPath()).thenReturn("\\");
        when(context2.getURLPath()).thenReturn("/share/");
        when(context2.getServer()).thenReturn("server");

        base2.resolveInContext(context2, "sub/child");