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TST: test_column_types_consistent #42725

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Merged
merged 5 commits into from
Jul 28, 2021
Merged

TST: test_column_types_consistent #42725

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6c4ec55
Merge pull request #1 from pandas-dev/master
shiv-io Mar 20, 2021
4c4bcf9
TST GH #26779
shiv-io Jul 26, 2021
f7478f4
Fix DataFrame constructor
shiv-io Jul 26, 2021
13005d4
Move test to test_loc.py
shiv-io Jul 27, 2021
60c87ab
Use NaT instead of NaN
shiv-io Jul 27, 2021
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31 changes: 31 additions & 0 deletions pandas/tests/indexing/test_loc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -143,6 +143,37 @@ def test_setitem_from_duplicate_axis(self):
)
tm.assert_frame_equal(df, expected)

def test_column_types_consistent(self):
# GH 26779
df = DataFrame(
data={
"channel": [1, 2, 3],
"A": ["String 1", np.NaN, "String 2"],
"B": [
Timestamp("2019-06-11 11:00:00"),
pd.NaT,
Timestamp("2019-06-11 12:00:00"),
],
}
)
df2 = DataFrame(
data={"A": ["String 3"], "B": [Timestamp("2019-06-11 12:00:00")]}
)
# Change Columns A and B to df2.values wherever Column A is NaN
df.loc[df["A"].isna(), ["A", "B"]] = df2.values
expected = DataFrame(
data={
"channel": [1, 2, 3],
"A": ["String 1", "String 3", "String 2"],
"B": [
Timestamp("2019-06-11 11:00:00"),
Timestamp("2019-06-11 12:00:00"),
Timestamp("2019-06-11 12:00:00"),
],
}
)
tm.assert_frame_equal(df, expected)


class TestLoc2:
# TODO: better name, just separating out things that rely on base class
Expand Down