'Test normally behaving rolls.'

def test_volume_roll(self):

    rolls = self.volume_roll_finder.get_rolls(root_symbol='CL', start=(self.START_DATE + self.trading_calendar.day), end=self.second_end_date, offset=0)
    self.assertEqual(rolls, [(1000, pd.Timestamp('2017-01-19', tz='UTC')), (1001, pd.Timestamp('2017-02-13', tz='UTC')), (1002, None)])
