}

    // Invalid: null is not allowed for valueOf
    @ParameterizedTest
    @NullSource
    @DisplayName("valueOf(null) throws NullPointerException")
    void valueOfRejectsNull(String input) {
        assertThrows(NullPointerException.class, () -> RequestParam.valueOf(input));
    }

    // Sanity: Enum.valueOf(Class, String) behaves identically to RequestParam.valueOf(String)
    @Test

            assertTrue(ex.getMessage().contains("Bad textual SID format"));
        }

        @Test
        @DisplayName("Textual constructor null throws NullPointerException")
        void testTextualConstructorNull() {
            assertThrows(NullPointerException.class, () -> new SID((String) null));
        }

        @Test
        @DisplayName("Binary constructor happy path and round-trip via toByteArray")

        assertEquals("remove", ex.getMessage());
    }

    @Test
    @DisplayName("Null tree handle throws NullPointerException during construction")
    void nullTreeHandle() {
        // Arrange
        SmbTreeHandleImpl nullTree = null;

        // Act + Assert
        assertThrows(NullPointerException.class,

     */
    @Test
    @DisplayName("Test constructor throws NullPointerException with null configuration")
    public void testConstructorWithNullConfig() {
        // When & Then - should throw NullPointerException since ServerMessageBlock calls config.getPid()
        NullPointerException exception = assertThrows(NullPointerException.class, () -> {
            smbComTreeDisconnect = new SmbComTreeDisconnect(null);
        });

        NtlmHttpServletRequest request = new NtlmHttpServletRequest(mockRequest, null);

        // getRemoteUser() will throw NPE when trying to call getName() on null principal
        assertThrows(NullPointerException.class, () -> request.getRemoteUser());
        assertNull(request.getUserPrincipal());
        assertEquals("NTLM", request.getAuthType());
    }

    @Test

            DcerpcBind bindWithNullBinding = new DcerpcBind(null, mockHandle);

            // When/Then
            assertThrows(NullPointerException.class, () -> {
                bindWithNullBinding.encode_in(mockBuffer);
            }, "Should throw NullPointerException when binding is null");
        }

        @Test
        @DisplayName("encode_in should use default constructor values")

        System.out.println(ex.getMessage());
    }

    /**
     * @throws Exception
     */
    @Test
    public void testGetCause() throws Exception {
        final Throwable t = new NullPointerException("test");
        final ClRuntimeException ex = new ClRuntimeException("ECL0017", asArray(t), t);
        assertThat(ex.getCause(), is(t));
        ex.printStackTrace();
    }

        TransTransactNamedPipeResponse nullBufferResponse = new TransTransactNamedPipeResponse(mockConfig, null);
        byte[] buffer = new byte[100];

        assertThrows(NullPointerException.class, () -> nullBufferResponse.readDataWireFormat(buffer, 0, 50));
    }

    @Test
    void testReadDataWireFormatEmptyOutputBuffer() throws SMBProtocolDecodingException {
        // Test with empty outputBuffer

            // Then
            assertNotNull(cancel);
            assertEquals(mid, cancel.getMid());
        }

        @Test
        @DisplayName("Should throw NullPointerException when config is null")
        void testNullConfigurationThrowsException() throws Exception {
            // Given

    @DisplayName("writeParametersWireFormat throws on null path")
    void testNullPath() {
        Trans2GetDfsReferral cmd = new Trans2GetDfsReferral(null);
        byte[] buffer = new byte[10];
        assertThrows(NullPointerException.class, () -> cmd.writeParametersWireFormat(buffer, 0));
    }

    @Nested
    @DisplayName("read methods are no‑ops")
    class ReadMethods {