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Fix behavior of the week_of_month property #774

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merged 1 commit into from
Dec 15, 2023
+47 −4
Merged

Fix behavior of the week_of_month property #774

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1 change: 0 additions & 1 deletion src/pendulum/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,7 +50,6 @@
SATURDAY = WeekDay.SATURDAY
SUNDAY = WeekDay.SUNDAY


_TEST_NOW: DateTime | None = None
_LOCALE = "en"
_WEEK_STARTS_AT: WeekDay = WeekDay.MONDAY
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4 changes: 1 addition & 3 deletions src/pendulum/date.py
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Expand Up @@ -74,9 +74,7 @@ def days_in_month(self) -> int:

@property
def week_of_month(self) -> int:
first_day_of_month = self.replace(day=1)

return self.week_of_year - first_day_of_month.week_of_year + 1
return math.ceil((self.day + self.first_of("month").isoweekday() - 1) / 7)

@property
def age(self) -> int:
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46 changes: 46 additions & 0 deletions tests/datetime/test_getters.py
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Expand Up @@ -195,6 +195,14 @@ def test_week_of_year_last_week():
assert pendulum.datetime(2012, 12, 31).week_of_year == 1


def test_week_of_month_edge_case():
assert pendulum.datetime(2020, 1, 1).week_of_month == 1
assert pendulum.datetime(2020, 1, 7).week_of_month == 2
assert pendulum.datetime(2020, 1, 14).week_of_month == 3
assert pendulum.datetime(2023, 1, 1).week_of_month == 1
assert pendulum.datetime(2023, 1, 31).week_of_month == 6


def test_timezone():
d = pendulum.datetime(2000, 1, 1, tz="America/Toronto")
assert d.timezone.name == "America/Toronto"
Expand Down Expand Up @@ -247,3 +255,41 @@ def test_time():
t = dt.time()
assert isinstance(t, pendulum.Time)
assert_time(t, 10, 40, 34, 123456)


@pytest.mark.parametrize(
"date, expected",
[
(pendulum.Date(2000, 1, 1), 1),
(pendulum.Date(2000, 1, 3), 2),
(pendulum.Date(2019, 12, 29), 5),
(pendulum.Date(2019, 12, 30), 6),
(pendulum.Date(2019, 12, 31), 6),
(pendulum.Date(2020, 1, 7), 2),
(pendulum.Date(2020, 1, 14), 3),
(pendulum.Date(2021, 1, 1), 1),
(pendulum.Date(2021, 1, 2), 1),
(pendulum.Date(2021, 1, 9), 2),
(pendulum.Date(2021, 1, 10), 2),
(pendulum.Date(2021, 1, 11), 3),
(pendulum.Date(2021, 1, 15), 3),
(pendulum.Date(2021, 1, 16), 3),
(pendulum.Date(2021, 1, 17), 3),
(pendulum.Date(2021, 1, 23), 4),
(pendulum.Date(2021, 1, 31), 5),
(pendulum.Date(2021, 12, 19), 3),
(pendulum.Date(2021, 12, 25), 4),
(pendulum.Date(2021, 12, 26), 4),
(pendulum.Date(2021, 12, 29), 5),
(pendulum.Date(2021, 12, 30), 5),
(pendulum.Date(2021, 12, 31), 5),
(pendulum.Date(2022, 1, 1), 1),
(pendulum.Date(2022, 1, 3), 2),
(pendulum.Date(2022, 1, 10), 3),
(pendulum.Date(2023, 1, 1), 1),
(pendulum.Date(2023, 1, 2), 2),
(pendulum.Date(2029, 12, 31), 6),
],
)
def test_week_of_month_negative(date, expected):
assert date.week_of_month == expected
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