assertFalse((writeOnly & ACE.FILE_READ_DATA) != 0, "Write should not include FILE_READ_DATA");
        }
    }

    @Nested
    @DisplayName("Boundary Conditions and Edge Cases")
    class BoundaryConditionsTests {

        @Test
        @DisplayName("Should handle signed/unsigned integer boundaries")
        void shouldHandleSignedUnsignedBoundaries() {

        assertEquals(8, serverData.encryptionKey.length);
        assertEquals(16, serverData.guid.length);
    }

    /**
     * Test edge cases for numeric fields
     */
    @Test
    @DisplayName("Test edge cases for numeric fields")
    public void testNumericFieldsEdgeCases() {
        // Test maximum values for int fields
        serverData.sflags2 = Integer.MAX_VALUE;

        // Service accessors
        assertEquals("cifs", auth.getService());
        auth.setService("");
        assertEquals("", auth.getService());

        // Lifetime accessors (edge: zero/negative)
        auth.setUserLifeTime(0);
        assertEquals(0, auth.getUserLifeTime());
        auth.setUserLifeTime(-1);
        assertEquals(-1, auth.getUserLifeTime());

        auth.setLifeTime(0);

        // 5. Verify heartbeat fails after unregistration
        assertFalse(mockService.processHeartbeat(regId, 4));
    }

    /**
     * Test error conditions and edge cases
     */
    @Test
    void testErrorConditions() {
        // Test operations on empty service
        assertEquals(0, mockService.getRegistrationCount());

            // The constructor doesn't actually call any methods on the config during construction
        }
    }

    @Nested
    @DisplayName("Edge case tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle maximum buffer index")
        void testMaxBufferIndex() throws SMBProtocolDecodingException {
            // Given

            // Test that it can be thrown as IOException
            assertThrows(IOException.class, () -> {
                throw exception;
            });
        }
    }

    @Nested
    @DisplayName("Edge Cases")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle very long messages")
        void testVeryLongMessage() {
            StringBuilder longMessage = new StringBuilder();

        // Act
        int actual = findNtStatusOrMinusOne(dosCode);

        // Assert
        assertEquals(expectedNtStatus, actual, "Mapping must match table entry");
    }

    @Test
    @DisplayName("Edge: zero DOS code maps to zero NTSTATUS")
    void zeroCodeMapsToZero() {
        // Act
        int actual = findNtStatusOrMinusOne(0x00000000);

        // Assert
        assertEquals(0x00000000, actual);
    }

            fail("setObject should handle different object types: " + e.getMessage());
        }
    }

    @Test
    public void test_error_handling_edge_cases() {
        // Test error handling with edge cases
        try {
            // Test with extreme status codes
            WebApiUtil.setError(-1, "Negative status code");
            WebApiUtil.setError(0, "Zero status code");

        assertFalse(Arrays.equals(signingKey1, signingKey2),
                "Different preauth values should produce different derived keys for SMB 3.1.1");
    }

    @Test
    @DisplayName("Should handle edge case with all zero session key")
    void testDeriveKeys_AllZeroSessionKey() {
        // Given
        byte[] zeroSessionKey = new byte[16]; // All zeros
        int dialect = Smb2Constants.SMB2_DIALECT_0311;

        auth.handle(new Callback[] { pc });
        assertEquals("secret", new String(pc.getPassword()));
    }

    @Test
    @DisplayName("handle: empty user/domain edge yields '@' and null password")
    void testHandleWithEmptyUserAndDomainEdge() throws Exception {
        // Default constructor results in empty strings for user and domain, null for password