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fix: raise ValueError if date is out-of-bounds #46

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merged 3 commits into from
Dec 4, 2021
Merged

fix: raise ValueError if date is out-of-bounds #46

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8399215
fix: raise ValueError if date is out-of-bounds
tswast Dec 3, 2021
f95e396
unify _datetime return type
tswast Dec 3, 2021
2ea4e51
add relevant unit test
tswast Dec 3, 2021
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4 changes: 2 additions & 2 deletions db_dtypes/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -233,15 +233,15 @@ def _datetime(
if scalar is None:
return None
elif isinstance(scalar, datetime.date):
return datetime.datetime(scalar.year, scalar.month, scalar.day)
return pandas.Timestamp(scalar.year, scalar.month, scalar.day)
elif isinstance(scalar, str):
match = match_fn(scalar)
if not match:
raise ValueError(f"Bad date string: {repr(scalar)}")
year = int(match.group("year"))
month = int(match.group("month"))
day = int(match.group("day"))
return datetime.datetime(year, month, day)
return pandas.Timestamp(year, month, day)
else:
raise TypeError("Invalid value type", scalar)

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3 changes: 2 additions & 1 deletion tests/unit/test_arrow.py
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Expand Up @@ -183,7 +183,7 @@ def types_mapper(
type=pyarrow.time64("us"),
),
),
(
pytest.param(
pandas.Series(
[
# Only microseconds are supported when reading data. See:
Expand Down Expand Up @@ -216,6 +216,7 @@ def types_mapper(
],
type=pyarrow.time64("ns"),
),
id="time-nanoseconds-arrow-round-trip",
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Leftover from debugging why when I made the "time" _datetime method return a Timestamp too, this broke. Since that change isn't necessary and it broke this test I reverted it. Kept the test id, since I thought it was useful.

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Test ID is indeed useful IMO. 👍

),
]

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5 changes: 5 additions & 0 deletions tests/unit/test_date.py
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Expand Up @@ -55,6 +55,11 @@ def test_date_parsing(value, expected):
("2021-2-99", "day is out of range for month"),
("2021-99-1", "month must be in 1[.][.]12"),
("10000-1-1", "year 10000 is out of range"),
# Outside of min/max values pandas.Timestamp.
("0001-01-01", "Out of bounds"),
("9999-12-31", "Out of bounds"),
("1677-09-21", "Out of bounds"),
("2262-04-12", "Out of bounds"),
],
)
def test_date_parsing_errors(value, error):
Expand Down