doThrow(expectedException).when(mockHandle).sendrecv(any(MsrpcSamrConnect4.class));

        DcerpcException thrown = assertThrows(DcerpcException.class, () -> {
            new SamrPolicyHandle(mockHandle, server, access);
        });

        assertEquals(expectedException, thrown);
        verify(mockHandle, times(1)).sendrecv(any(MsrpcSamrConnect4.class));

        // Act & Assert: the exception is propagated and interaction recorded once
        RuntimeException thrown = assertThrows(RuntimeException.class, supplier::get);
        assertInstanceOf(SmbUnsupportedOperationException.class, thrown.getCause());
        assertEquals("boom", thrown.getCause().getMessage());
        verify(supplier, times(1)).get();
        verifyNoMoreInteractions(supplier);
    }

    @Test

        chain.updateThrowsException = true;
        User user = createTestUser("testuser", "Test User");

        try {
            chain.update(user);
            fail("Expected exception to be thrown");
        } catch (RuntimeException e) {
            assertEquals("Update failed", e.getMessage());
        }

        assertEquals(1, chain.updateCalls.size());
    }

    // Test basic delete operation

        }).when(mockDcerpcHandle).sendrecv(any(MsrpcSamrOpenAlias.class));

        // Act & Assert
        SmbException thrown = assertThrows(SmbException.class, () -> {
            new SamrAliasHandle(mockDcerpcHandle, mockSamrDomainHandle, access, rid);
        });

        assertEquals(errorCode, thrown.getNtStatus());
    }

    @Test
    void close_shouldCloseAliasSuccessfully() throws IOException {
        // Arrange

                  actualOccupiedDepth.set(monitor.getOccupiedDepth());
                } catch (Throwable t) {
                  thrown.set(t);
                }
              }
            }));
    assertNull(thrown.get());
    assertEquals(expectedIsOccupied, actualIsOccupied.get());
    assertEquals(expectedIsOccupiedByCurrentThread, actualIsOccupiedByCurrentThread.get());

                  actualOccupiedDepth.set(monitor.getOccupiedDepth());
                } catch (Throwable t) {
                  thrown.set(t);
                }
              }
            }));
    assertNull(thrown.get());
    assertEquals(expectedIsOccupied, actualIsOccupied.get());
    assertEquals(expectedIsOccupiedByCurrentThread, actualIsOccupiedByCurrentThread.get());

        smbFileHandle.close(lastWriteTime);
        verify(smbFileHandle, times(1)).close(lastWriteTime);
    }

    /**
     * Test close(long) when a CIFSException is thrown.
     *
     * @throws CIFSException
     */
    @Test
    void testCloseWithLastWriteTime_throwsCIFSException() throws CIFSException {
        long lastWriteTime = System.currentTimeMillis();

     *
     * @param <REQ> The request type
     * @param <REP> The response type
     * @param req The request object used as the cache key
     * @param supplier The function to execute and cache the result
     * @return The result from the supplier (either fresh or cached)

    @Test
    void testSetOptionEndpointInvalidPipe() {
        String endpoint = "\\pipe\\unknown";
        DcerpcException thrown = assertThrows(DcerpcException.class, () -> {
            dcerpcBinding.setOption("endpoint", endpoint);
        }, "Should throw DcerpcException for unknown pipe endpoint.");

        assertTrue(thrown.getMessage().contains("Bad endpoint"), "Exception message should indicate a bad endpoint.");
    }

    @Test

     */
    @Test
    void testConstructorMalformedData() {
        // Prepare data (only 2 bytes, less than an int)
        byte[] data = new byte[] { 0x01, 0x02 };

        // Verify that PACDecodingException is thrown
        assertThrows(PACDecodingException.class, () -> {
            new PacSignature(data);
        });
    }

    /**
     * Test constructor with checksum too short for KERB_CHECKSUM_HMAC_MD5.
     */