SmbFile file = mock(SmbFile.class);
        when(file.getAttributes()).thenReturn(SmbFile.ATTR_NORMAL);
        assertTrue(filter.accept(file), "Attributes match should be accepted");
        verify(file, times(1)).getAttributes();
    }

    @Test
    public void testAcceptReturnsFalseWhenAttributesDoNotMatch() throws Exception {
        SmbFile file = mock(SmbFile.class);
        when(file.getAttributes()).thenReturn(SmbFile.ATTR_HIDDEN);

        // Assert
        assertEquals(msg, ex.getMessage(), "Constructor should preserve the provided message (including null)");
        assertNull(ex.getCause(), "No cause expected when only message is provided");

        // toString behavior mirrors Throwable: includes message when not null
        String ts = ex.toString();
        assertTrue(ts.contains("SmbUnsupportedOperationException"), "toString should contain class name");
        if (msg != null) {

        context = mock(CIFSContext.class);
        when(context.getConfig()).thenReturn(config);
    }

    /**
     * Test method for {@link jcifs.internal.smb1.com.SmbComClose#SmbComClose(jcifs.Configuration, int, long)}.
     */
    @Test
    public void testConstructor() {
        // Given
        int fid = 123;
        long lastWriteTime = System.currentTimeMillis();

        // When

 */
class SmbComTreeDisconnectTest {

    /**
     * Test the constructor of SmbComTreeDisconnect.
     */
    @Test
    void testConstructor() {
        // When
        SmbComTreeDisconnect smbComTreeDisconnect = new SmbComTreeDisconnect();

        // Then
        assertEquals(ServerMessageBlock.SMB_COM_TREE_DISCONNECT, smbComTreeDisconnect.command, "Command should be SMB_COM_TREE_DISCONNECT");
    }

    /**

        assertTrue(resp.isLoggedInAsGuest(), "Guest/anonymous should be detected");

        // prepare should propagate session id when received
        CIFSContext mockCtx = mock(CIFSContext.class);
        when(mockCtx.getConfig()).thenReturn(mock(Configuration.class));
        Smb2SessionSetupRequest nextReq = new Smb2SessionSetupRequest(mockCtx, 0, 0, 0L, null);

            buffer.putInt(512); // Bytes per sector
            byte[] bufferArray = buffer.array();

            // When
            int bytesConsumed = fileFsSizeInfo.decode(bufferArray, 0, bufferArray.length);

            // Then
            assertEquals(24, bytesConsumed);
            assertEquals(1048576L * 8 * 512, fileFsSizeInfo.getCapacity());

    void testNextReturnsNull() {
        // When
        SmbResource result = emptyIterator.next();

        // Then
        assertNull(result, "next() should return null for empty iterator");
    }

    @Test
    @DisplayName("next should not throw NoSuchElementException")
    void testNextDoesNotThrowException() {
        // When & Then
        assertDoesNotThrow(() -> {
            emptyIterator.next();

            // Given
            long sourceOffset = 1024L;
            long targetOffset = 2048L;
            int length = 4096;

            // When
            SrvCopychunk chunk = new SrvCopychunk(sourceOffset, targetOffset, length);

            // Then
            assertNotNull(chunk);
        }

        @ParameterizedTest
        @DisplayName("Should create instance with various offset values")

        // Test registerSmbURLHandler when java.protocol.handler.pkgs is null
        System.clearProperty("java.protocol.handler.pkgs");
        SingletonContext.registerSmbURLHandler();
        assertEquals("jcifs", System.getProperty("java.protocol.handler.pkgs"));
    }

    @Test
    void testRegisterSmbURLHandlerWhenPkgsDoesNotContainJcifs() {

    @Test
    @DisplayName("Should create RuntimeCIFSException with default constructor")
    void testDefaultConstructor() {
        // When
        RuntimeCIFSException exception = new RuntimeCIFSException();

        // Then
        assertNotNull(exception);
        assertNull(exception.getMessage());
        assertNull(exception.getCause());
        assertTrue(exception instanceof RuntimeException);