def test_record_past_rounds():
tourney = Tournament(['a', 'b', 'c', 'd', 'e'], DummyRoundGenerator())
tourney.startNextRound()
tourney.startNextRound()
past_rounds = tourney.pastRounds()
# expects 2 nonempty past rounds with all unique game ids
return len(past_rounds) == 2 \
and len(past_rounds[0]) > 0\
and len(past_rounds[1]) > 0 \
and len(set(past_rounds[0]) & set(past_rounds[1])) == 0
