assertEquals(cause, exception.getRootCause(), "getRootCause() should return the same cause as getCause().");
    }

    /**
     * Test getErrorCode() method.
     */
    @Test
    void testGetErrorCode() {
        int errorCode = 0x00000005; // DCERPC_FAULT_ACCESS_DENIED
        DcerpcException exception = new DcerpcException(errorCode);

        assertEquals(100, mockResponse.getGrantedCredits());

        // Verify the method was called
        verify(mockResponse, times(1)).getGrantedCredits();
    }

    @Test
    void testGetErrorCode() {
        // Simulate error code
        when(mockResponse.getErrorCode()).thenReturn(-1);
        assertEquals(-1, mockResponse.getErrorCode());

        // Verify the method was called

        }
    }

    @Nested
    @DisplayName("Error Code Tests")
    class ErrorCodeTests {

        @Test
        @DisplayName("Should return status as error code")
        void testGetErrorCode() {
            int status = NtStatus.NT_STATUS_ACCESS_DENIED;
            response.setStatusForTest(status);

            assertEquals(status, response.getErrorCode());
        }
    }

    @Nested

        }
    }

    @Nested
    @DisplayName("Error Code Tests")
    class ErrorCodeTests {

        @Test
        @DisplayName("Should get error code from status")
        void testGetErrorCode() throws Exception {
            int status = NtStatus.NT_STATUS_ACCESS_DENIED;
            setStatus(echoResponse, status);

            assertEquals(status, echoResponse.getErrorCode());
        }
    }

        assertEquals(expectedCredits, actualCredits);
        verify(response).getGrantedCredits();
    }

    @Test
    @DisplayName("Test Response interface methods - getErrorCode")
    void testGetErrorCode() {
        // Given
        int expectedErrorCode = 0xC0000001;
        when(response.getErrorCode()).thenReturn(expectedErrorCode);

        // When
        int actualErrorCode = response.getErrorCode();