}

    @Test
    @DisplayName("Test custom implementation with signing not enforced")
    void testCustomImplementationSigningNotEnforced() {
        // Given
        SmbNegotiationRequest request = new TestSmbNegotiationRequest(false);

        // When
        boolean result = request.isSigningEnforced();

        // Then
        assertFalse(result, "Custom implementation should return false when initialized with false");
    }

            // Test with concrete implementation - behavior depends on implementation
            // May throw NullPointerException
            try {
                concreteImplementation.append(null);
            } catch (NullPointerException e) {
                // Expected for some implementations
            }
        }
    }

    @Nested

        // Then
        assertEquals(42, capturedFileId[0], "Anonymous implementation should work correctly");
    }

    @Test
    @DisplayName("Should verify all known implementations")
    void testAllKnownImplementations() {
        // List of all known implementations of RequestWithFileId
        Class<?>[] implementations = { Smb2CloseRequest.class, Smb2QueryInfoRequest.class, Smb2SetInfoRequest.class,

import jcifs.internal.smb2.rdma.RdmaNegotiateResponse;

/**
 * DiSNI RDMA connection implementation.
 *
 * This class would integrate with the DiSNI library to provide
 * high-performance RDMA operations over InfiniBand/RoCE networks.
 *
 * Note: This is a skeleton implementation. A real implementation would
 * require proper DiSNI integration with actual RDMA hardware.
 */

            int result = testImpl.decode(buffer, 10, 40);

            assertEquals(0, result); // Test implementation returns 0
        }
    }

    @Nested
    @DisplayName("SmbInfoAllocation Implementation Tests")
    class SmbInfoAllocationTests {

        private SmbInfoAllocation smbInfoAllocation;

        @BeforeEach
        void setUp() {

/**
 * Tests for the NdrObject abstract class.
 * This test uses a concrete implementation to verify the abstract contract.
 */
@ExtendWith(MockitoExtension.class)
class NdrObjectTest {

    @Mock
    private NdrBuffer mockBuffer;

    private ConcreteNdrObject ndrObject;

    // A concrete implementation of NdrObject for testing purposes.
    private static class ConcreteNdrObject extends NdrObject {

 * either providing your own implementation, or delegating to the provided {@code standardAdd}
 * method.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingSortedMultiset}.
 *

        }
        verifyNoInteractions(mockDir);
    }

    /**
     * Edge: passing a null directory object. Interface allows null; implementation decides.
     */
    @Test
    @DisplayName("null directory is handled by implementation")
    void handlesNullDirectory() throws Exception {
        SmbFilenameFilter filter = (dir, name) -> dir == null;

    }

    @ParameterizedTest(name = "Implementation is instance: {0}")
    @MethodSource("implementations")
    @DisplayName("Happy path: can create implementations and use type checks")
    void testImplementationsAreUsable(SessionSetupHandler impl) {
        // Arrange is provided by method source

        // Act & Assert
        assertNotNull(impl, "Implementation instance should not be null");

    private ConcreteSmbComNtTransaction smbComNtTransaction;

    // A concrete implementation of the abstract class SmbComNtTransaction for testing.
    private static class ConcreteSmbComNtTransaction extends SmbComNtTransaction {
        @Override
        int writeSetupWireFormat(byte[] dst, int dstIndex) {
            // Dummy implementation for testing
            return 0;
        }

        @Override