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TST: series offset artithmetic tests #34582

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28ae2ae
TST: Added tests to check the arithmetic behaviour of adding and subt…
Jun 4, 2020
b9b04e6
TST: Run isort for test_arithmetic.py
Jun 4, 2020
5f8aaed
TST: Reworked tests for GH#19211 after review and added several tests…
Jun 6, 2020
aace93c
TST: Reworked tests for GH#19211 after review. Replaced warnings.simp…
Jun 6, 2020
6c81b5b
TST: Restored accidentally deleted blank line
Jun 6, 2020
f40b143
TST: Parametrized tests to avoid code duplication.
Jun 7, 2020
d4fd4e6
TST: Moved tests to pandas/tests/arithmetic/test_datetime64.py and re…
Jun 7, 2020
09e6ba1
TST: Grouped dependent input/output parameters at @parametrize.
Jun 8, 2020
1519abb
TST: Adapted test test_dti_addsub_offset_arraylike. Changed index_or_…
Jun 10, 2020
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33 changes: 33 additions & 0 deletions pandas/tests/series/test_arithmetic.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
from datetime import timedelta
import operator
import warnings

import numpy as np
import pytest
Expand Down Expand Up @@ -679,6 +680,38 @@ def test_series_add_aware_naive_raises(self):
with pytest.raises(Exception, match=msg):
ser_utc + ser

def test_series_add_daytime_offset(self):
# GH#19211
# Ignore PerformanceWarning for this test case
warnings.simplefilter(action="ignore", category=pd.errors.PerformanceWarning)
ser_daytime = pd.Series(
[pd.Timestamp("2000-01-01"), pd.Timestamp("2000-02-01")]
)
ser_offset = pd.Series(
[pd.offsets.DateOffset(years=1), pd.offsets.DateOffset(months=2)]
)

result = ser_daytime + ser_offset

expected = pd.Series([pd.Timestamp("2001-01-01"), pd.Timestamp("2000-04-01")])
tm.assert_series_equal(result, expected)

def test_series_sub_daytime_offset(self):
# GH#19211
# Ignore PerformanceWarning for this test case
warnings.simplefilter(action="ignore", category=pd.errors.PerformanceWarning)
ser_daytime = pd.Series(
[pd.Timestamp("2000-01-01"), pd.Timestamp("2000-03-29")]
)
ser_offset = pd.Series(
[pd.offsets.DateOffset(years=1), pd.offsets.DateOffset(months=2)]
)

result = ser_daytime - ser_offset

expected = pd.Series([pd.Timestamp("1999-1-1"), pd.Timestamp("2000-1-29")])
tm.assert_series_equal(result, expected)

def test_datetime_understood(self):
# Ensures it doesn't fail to create the right series
# reported in issue#16726
Expand Down