def test_days_studied_works_with_old_logs():
# ARRANGE
col = getEmptyCol()
ivl = 1
card = create_learning_card(col, ivl)
hard_answer = 2
factor = 2500
time_taken = 10 # seconds
for day in range(1, 31):
timestamp = datetime(2020, 4, day, 12, 0, 0, 0).timestamp()
# days, due were added, so previous logs have 0s
col.db.execute("insert into revlog values (?,?,?,?,?,?,?,?,?,?,?)",
int(timestamp * 1000), card.id, col.usn(), hard_answer,
ivl, ivl, factor, time_taken, 1, 0, 0)
# ACT
collection_stats = CollectionStats(col)
collection_stats.type = 2
return_value = collection_stats._daysStudied()
# ASSERT
# number of days should be 30
assert return_value[0] == 30
