73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
import pytest
|
|
|
|
from pandas import TimedeltaIndex
|
|
|
|
from pandas.tseries.offsets import (
|
|
DateOffset,
|
|
Day,
|
|
Hour,
|
|
MonthEnd,
|
|
)
|
|
|
|
|
|
class TestFreq:
|
|
@pytest.mark.parametrize("values", [["0 days", "2 days", "4 days"], []])
|
|
@pytest.mark.parametrize("freq", ["2D", Day(2), "48h", Hour(48)])
|
|
def test_freq_setter(self, values, freq):
|
|
# GH#20678
|
|
idx = TimedeltaIndex(values)
|
|
|
|
# can set to an offset, converting from string if necessary
|
|
idx._data.freq = freq
|
|
assert idx.freq == freq
|
|
assert isinstance(idx.freq, DateOffset)
|
|
|
|
# can reset to None
|
|
idx._data.freq = None
|
|
assert idx.freq is None
|
|
|
|
def test_with_freq_empty_requires_tick(self):
|
|
idx = TimedeltaIndex([])
|
|
|
|
off = MonthEnd(1)
|
|
msg = "TimedeltaArray/Index freq must be a Tick"
|
|
with pytest.raises(TypeError, match=msg):
|
|
idx._with_freq(off)
|
|
with pytest.raises(TypeError, match=msg):
|
|
idx._data._with_freq(off)
|
|
|
|
def test_freq_setter_errors(self):
|
|
# GH#20678
|
|
idx = TimedeltaIndex(["0 days", "2 days", "4 days"])
|
|
|
|
# setting with an incompatible freq
|
|
msg = (
|
|
"Inferred frequency 2D from passed values does not conform to "
|
|
"passed frequency 5D"
|
|
)
|
|
with pytest.raises(ValueError, match=msg):
|
|
idx._data.freq = "5D"
|
|
|
|
# setting with a non-fixed frequency
|
|
msg = r"<2 \* BusinessDays> is a non-fixed frequency"
|
|
with pytest.raises(ValueError, match=msg):
|
|
idx._data.freq = "2B"
|
|
|
|
# setting with non-freq string
|
|
with pytest.raises(ValueError, match="Invalid frequency"):
|
|
idx._data.freq = "foo"
|
|
|
|
def test_freq_view_safe(self):
|
|
# Setting the freq for one TimedeltaIndex shouldn't alter the freq
|
|
# for another that views the same data
|
|
|
|
tdi = TimedeltaIndex(["0 days", "2 days", "4 days"], freq="2D")
|
|
tda = tdi._data
|
|
|
|
tdi2 = TimedeltaIndex(tda)._with_freq(None)
|
|
assert tdi2.freq is None
|
|
|
|
# Original was not altered
|
|
assert tdi.freq == "2D"
|
|
assert tda.freq == "2D"
|