}

    /**
     * Test isValid() when the handle is valid.
     */
    @Test
    void testIsValid_whenValid() {
        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

        final java.lang.reflect.Method method = CrawlerThread.class.getDeclaredMethod("isValid", UrlQueue.class);
        method.setAccessible(true);
        final boolean result = (boolean) method.invoke(crawlerThread, urlQueue);

        assertTrue(result);
    }

    /**
     * Test isValid method with a null URL queue.
     */
    public void test_isValid_nullUrlQueue() throws Exception {

        SecDispatcher.ValidationResponse response = secDispatcher.validateConfiguration();
        if (!response.isValid() || context.options().verbose().orElse(false)) {
            dumpResponse(context, "", response);
        }
        return response.isValid();
    }

    protected void dumpResponse(EncryptContext context, String indent, SecDispatcher.ValidationResponse response) {

        when(mockFileHandle.isValid()).thenReturn(false);
        assertFalse(outputStream.isOpen());
    }

    @Test
    void testWriteAfterClose() throws IOException, CIFSException {
        // Given
        when(mockTreeHandle.isSMB2()).thenReturn(true);
        when(mockTreeHandle.getSendBufferSize()).thenReturn(65536);
        when(mockFileHandle.isValid()).thenReturn(true);

    }

    @Test
    @DisplayName("Test isValid returns false for invalid negotiation")
    void testIsValidReturnsFalse() {
        // Arrange
        when(negotiationResponse.isValid(cifsContext, negotiationRequest)).thenReturn(false);

        // Act
        boolean result = negotiationResponse.isValid(cifsContext, negotiationRequest);

        // Assert

                    this.currentHash = newHash.clone();
                }
            }
        }

        public boolean isValid() {
            return isValid;
        }

        public void invalidate() {
            this.isValid = false;
            // Clear sensitive data
            synchronized (hashLock) {
                Arrays.fill(currentHash, (byte) 0);
            }

        assertTrue(h.isValid());

        // Tree id change makes it invalid
        when(tree.getTreeId()).thenReturn(11L);
        assertFalse(h.isValid());

        // Connected=false makes it invalid
        when(tree.getTreeId()).thenReturn(10L);
        when(tree.isConnected()).thenReturn(false);
        assertFalse(h.isValid());

        // Mark closed makes it invalid

    @Mock
    SmbTreeHandleImpl tree;

    // Prepare SMB2 flow with a given response
    private void setupSmb2(NotifyResponse resp, byte[] fileId) throws Exception {
        when(handle.isValid()).thenReturn(true);
        when(handle.getTree()).thenReturn(tree);
        when(tree.isSMB2()).thenReturn(true);
        when(tree.getConfig()).thenReturn(mock(Configuration.class));

 * <p>Example usage:</p>
 * <pre>
 *     RequestHeader header = new RequestHeader("Content-Type", "application/json");
 *     String name = header.getName();
 *     String value = header.getValue();
 *     boolean isValid = header.isValid();
 * </pre>
 *
 * <p>Note: The name should not be blank and the value should not be null for the header to be considered valid.</p>
 *
 * @see java.io.Serializable
 */

     * @throws SmbException
     */
    public int getFid() throws SmbException {
        if (!isValid()) {
            throw new SmbException("Descriptor is no longer valid");
        }
        return this.fid;
    }

    public byte[] getFileId() throws SmbException {
        if (!isValid()) {
            throw new SmbException("Descriptor is no longer valid");
        }
        return this.fileId;