verify(mockSmbPipeHandleInternal).send(buf, 10, 50);
        }

        @Test
        @DisplayName("Should throw IOException when handle is stale")
        void testDoSendFragment_StaleHandle() throws Exception {
            DcerpcPipeHandle handle = createMockedDcerpcPipeHandle();
            when(mockSmbPipeHandleInternal.isStale()).thenReturn(true);