def test_index_datetime_from_date_range(self) -> None:
date_min, date_max = (np.datetime64('2007-02'), np.datetime64('2020-04'))
# we reject year-mos when calling from_date_range
with self.assertRaises(RuntimeError):
_ = IndexYearMonth.from_date_range(date_min, date_max)
def test_index_year_month_from_date_range_a(self) -> None:
index = IndexYearMonth.from_date_range('2017-12-15', '2018-03-15')
self.assertEqual(len(index), 4)
index = IndexYearMonth.from_date_range('2017-12-15', '2018-03-15', 2)
self.assertEqual(len(index), 2)