customRequest.setFileId(testFileId);

        // Then
        assertArrayEquals(testFileId, customRequest.getFileId(), "Custom implementation should store file ID correctly");
        assertEquals(1, customRequest.getSetCount(), "Should track set count correctly");
    }

        // Act & Assert
        assertThrows(NullPointerException.class, () -> handler.openConnection(null));
    }

    @Test
    @DisplayName("URL created with handler parses SMB URL correctly")
    void testUrlCreationWithHandler() throws Exception {
        // Act - Create various SMB URLs using the handler
        URL url1 = new URL(null, "smb://host/share", handler);

        // Verify that the super constructor was called with the correct arguments
        // Note: Mockito cannot directly verify super constructor calls.
        // We assume if the object is created, the super constructor was called.
        // We can verify the state of the object after construction.

        // Verify ptype and flags are set correctly
        assertEquals(0, policy.getPtype(), "ptype should be 0");

    }

    @Test
    @DisplayName("Should create request with correct command type and path")
    void testConstructorSetsCorrectCommandAndPath() throws Exception {
        // Given & When
        String path = "\\\\testserver\\testshare";
        Smb2TreeConnectRequest req = new Smb2TreeConnectRequest(mockConfig, path);

        // Then - verify command is set correctly using reflection

        }
    }

    @Nested
    @DisplayName("FileId Tests")
    class FileIdTests {

        @Test
        @DisplayName("Should set file ID correctly")
        void testSetFileId() {
            byte[] newFileId = new byte[16];
            new SecureRandom().nextBytes(newFileId);

            assertDoesNotThrow(() -> request.setFileId(newFileId));
        }

    } finally {
      executor.shutdownNow();
    }

    assertTrue(future.isDone());
    assertFalse(future.isCancelled());
  }

  /** Tests that the {@link Future#get(long, TimeUnit)} method times out correctly. */
  public void testTimeoutOnGetWorksCorrectly() throws InterruptedException, ExecutionException {

    // The task thread waits for the latch, so we expect a timeout here.
    try {
      future.get(20, MILLISECONDS);

    @Test
    @DisplayName("readULong correctly interprets little endian")
    void testReadULong() {
        byte[] a = new byte[] { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0x04 };
        int result = NtlmMessage.readULong(a, 0);
        assertEquals(0x04030201, result, "ULong should be little‑endian");
    }

    @Test
    @DisplayName("readUShort correctly interprets little endian")
    void testReadUShort() {

                    "Should return correct message for error 1");
            assertEquals("DCERPC_BIND_ERR_PROPOSED_TRANSFER_SYNTAXES_NOT_SUPPORTED", getResultMessageMethod.invoke(null, 2),
                    "Should return correct message for error 2");
            assertEquals("DCERPC_BIND_ERR_LOCAL_LIMIT_EXCEEDED", getResultMessageMethod.invoke(null, 3),
                    "Should return correct message for error 3");
        }

            return 0;
        }
    }

    @Nested
    @DisplayName("Interface Contract Tests")
    class InterfaceContractTests {

        @Test
        @DisplayName("Interface should be correctly implemented by mock")
        void testInterfaceImplementation() {
            CreateContextResponse response = mock(CreateContextResponse.class);
            assertNotNull(response);

        assertEquals(mockConfig, responseConfig);

        // Verify response has correct fileId
        assertEquals(testFileId, response.getFileId());

        // Verify response has correct fileName
        assertEquals(testFileName, response.getFileName());
    }

    @Test
    @DisplayName("size should return correct message size")
    void testSize() {