def test_resample_count_empty_series(freq, empty_series_dti, resample_method):
# GH28427
result = getattr(empty_series_dti.resample(freq), resample_method)()
index = _asfreq_compat(empty_series_dti.index, freq)
expected = Series([], dtype="int64", index=index, name=empty_series_dti.name)
tm.assert_series_equal(result, expected)
def test_resample_size_empty_dataframe(freq, empty_frame_dti):
# GH28427
empty_frame_dti["a"] = []
result = empty_frame_dti.resample(freq).size()
index = _asfreq_compat(empty_frame_dti.index, freq)
expected = pd.Series([], dtype="int64", index=index)
tm.assert_series_equal(result, expected)
def test_resample_count_empty_dataframe(freq, empty_frame_dti):
# GH28427
empty_frame_dti["a"] = []
result = empty_frame_dti.resample(freq).count()
index = _asfreq_compat(empty_frame_dti.index, freq)
expected = pd.DataFrame({"a": []}, dtype="int64", index=index)
tm.assert_frame_equal(result, expected)
def test_resample_empty_series(freq, empty_series_dti, resample_method):
# GH12771 & GH12868
if resample_method == "ohlc":
pytest.skip("need to test for ohlc from GH13083")
s = empty_series_dti
result = getattr(s.resample(freq), resample_method)()
expected = s.copy()
expected.index = _asfreq_compat(s.index, freq)
tm.assert_index_equal(result.index, expected.index)
assert result.index.freq == expected.index.freq
tm.assert_series_equal(result, expected, check_dtype=False)
def test_resample_empty_dataframe(empty_frame_dti, freq, resample_method):
# GH13212
df = empty_frame_dti
# count retains dimensions too
result = getattr(df.resample(freq), resample_method)()
if resample_method != "size":
expected = df.copy()
else:
# GH14962
expected = Series([], dtype=object)
expected.index = _asfreq_compat(df.index, freq)
tm.assert_index_equal(result.index, expected.index)
assert result.index.freq == expected.index.freq
tm.assert_almost_equal(result, expected, check_dtype=False)
def test_resample_empty_series(freq, empty_series_dti, resample_method,
request):
# GH12771 & GH12868
if resample_method == "ohlc" and isinstance(empty_series_dti.index,
PeriodIndex):
request.node.add_marker(
pytest.mark.xfail(
reason=f"GH13083: {resample_method} fails for PeriodIndex"))
ser = empty_series_dti
result = getattr(ser.resample(freq), resample_method)()
expected = ser.copy()
expected.index = _asfreq_compat(ser.index, freq)
tm.assert_index_equal(result.index, expected.index)
assert result.index.freq == expected.index.freq
tm.assert_series_equal(result, expected, check_dtype=False)