def test_from_datetime64_freq_changes():
# https://github.com/pandas-dev/pandas/issues/23438
arr = pd.date_range("2017", periods=3, freq="D")
result = PeriodArray._from_datetime64(arr, freq="M")
expected = period_array(['2017-01-01', '2017-01-01', '2017-01-01'],
freq="M")
tm.assert_period_array_equal(result, expected)
def test_from_datetime64_freq_changes():
# https://github.com/pandas-dev/pandas/issues/23438
arr = pd.date_range("2017", periods=3, freq="D")
result = PeriodArray._from_datetime64(arr, freq="M")
expected = period_array(["2017-01-01", "2017-01-01", "2017-01-01"],
freq="M")
tm.assert_period_array_equal(result, expected)
def test_from_datetime64_raises():
arr = pd.date_range("2017", periods=3, freq="D")
with tm.assert_raises_regex(IncompatibleFrequency, "freq"):
PeriodArray._from_datetime64(arr, freq="M")
