assertSame(fd, result);
        verify(handle, times(1)).ensureOpen();
    }

    @Test
    @DisplayName("close() does nothing (no delegate interactions)")
    void close_isNoop() throws Exception {
        // Verify close() is a no-op and does not call handle/tree/fd
        SmbPipeInputStream stream = newStreamWithInit(true);

        // reset to ignore constructor interactions