assertEquals(0, n, "Default response length is 0 unless protocol fills it");
    }

    @Test
    @DisplayName("sendrecv falls back to stream write/read when no call/transact")
    void sendrecv_stream_fallback_uses_streams() throws Exception {
        // Arrange - use non-transact, non-call pipe type
        SmbPipeHandleImpl handle = newHandleWithBasicStubs(SmbPipeResource.PIPE_TYPE_RDWR, "\\\\pipe\\\\x");