added a test to check register ops done during a pending poll. (#1220)
added a test to check register ops done during a pending poll. (#1220)

Added a test to check register ops done during a pending poll.

Signed-off-by: Daniel Tacalau <abab552e4976088a238d6804ad50c4c9e9a7e35d@gmail.com>

carllerche/mio,carllerche/mio