assertEquals(7, n);
        verify(in).readDirect(b, 2, 4);
    }

    @Test
    @DisplayName("send delegates to output.writeDirect with provided args")
    void testSendDelegation() throws Exception {
        SmbPipeHandleImpl spyTarget = spy(target);
        SmbPipeOutputStream out = mock(SmbPipeOutputStream.class);
        doReturn(out).when(spyTarget).getOutput();