assertEquals("5", KerberosConstants.KERBEROS_VERSION, "KERBEROS_VERSION should have the correct value.");
        assertEquals(23, KerberosConstants.RC4_ENC_TYPE, "RC4_ENC_TYPE should have the correct value.");
        assertEquals("HmacMD5", KerberosConstants.HMAC_ALGORITHM, "HMAC_ALGORITHM should have the correct value.");
    }

        // Then
        assertTrue(msrpcSamrConnect2 instanceof samr.SamrConnect2, "Should be an instance of samr.SamrConnect2");
        assertTrue(msrpcSamrConnect2 instanceof DcerpcMessage, "Should be an instance of DcerpcMessage");
    }

    @Test
    @DisplayName("Should have correct opnum from parent class")
    void shouldHaveCorrectOpnum() {
        // When

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

        // Then
        assertNotNull(ex, "Exception should be created");
        assertNull(ex.getMessage(), "Default message should be null");
        assertNull(ex.getCause(), "Default cause should be null");

        assertEquals(0xB, PacConstants.CONSTRAINT_DELEGATIION_TYPE, "CONSTRAINT_DELEGATIION_TYPE should be 0xB");
        assertEquals(0xC, PacConstants.CLIENT_UPN_TYPE, "CLIENT_UPN_TYPE should be 0xC");
        assertEquals(0xD, PacConstants.CLIENT_CLAIMS_TYPE, "CLIENT_CLAIMS_TYPE should be 0xD");
        assertEquals(0xE, PacConstants.DEVICE_INFO_TYPE, "DEVICE_INFO_TYPE should be 0xE");

    class SamrCloseHandleTests {

        @Test
        @DisplayName("Should construct with correct opnum")
        void testConstructorAndOpnum() {
            // When: Creating close handle message
            samr.SamrCloseHandle message = new samr.SamrCloseHandle(mockPolicyHandle);

            // Then: Should have correct opnum and handle
            assertEquals(0x01, message.getOpnum());

        }

        @Test
        @DisplayName("Should initialize with SMB2_READ command")
        void testCommandInitialization() {
            Smb2ReadRequest readRequest = new Smb2ReadRequest(mockConfig, testFileId, outputBuffer, 0);
            // Command is set in parent constructor
            assertNotNull(readRequest);
        }

        @Test
        @DisplayName("Should accept null file ID in constructor")

        assertNotNull(authorizations, "The authorizations list should not be null.");
        assertEquals(2, authorizations.size(), "The authorizations list should contain two elements.");
        assertTrue(authorizations.contains(mockAuthData1), "The list should contain the first mocked auth data.");
        assertTrue(authorizations.contains(mockAuthData2), "The list should contain the second mocked auth data.");
    }

        assertNotNull(dfsRootEnum, "The MsrpcDfsRootEnum object should not be null.");
        // The server name is stored in a protected field without a public getter, so we cannot directly test it.
        // We can test the public fields that are set.
        assertEquals(200, dfsRootEnum.level, "The level should be initialized to 200.");
        assertNotNull(dfsRootEnum.info, "The info struct should not be null.");

        // Arrange & Act
        TransWaitNamedPipeResponse resp = new TransWaitNamedPipeResponse();
        // Assert
        assertNotNull(resp, "Instance should not be null");
    }

    /**
     * All wire‑format methods should return zero regardless of inputs.
     */
    @Nested
    @DisplayName("Wire format method behaviour")
    class WireFormatMethods {
        @ParameterizedTest

        assertNotNull(region, "Send region should not be null");
        assertTrue(region.getSize() >= 1024, "Region should be at least requested size");
        assertTrue(region.hasAccess(RdmaAccess.LOCAL_READ), "Should have local read access");
        assertTrue(region.hasAccess(RdmaAccess.REMOTE_READ), "Should have remote read access");

        // Verify provider was called