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odysseus/tests/test_compute_next_run_monthly_clamp.py

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Python

"""compute_next_run monthly must clamp to short months, not skip them.
Old behavior: now.replace(day=31) raises ValueError in February, the
except set candidate = now, candidate <= now then jumped straight to the
NEXT month (which does clamp). A task scheduled for day 31 therefore never
fired in February, April, June, September or November.
"""
from datetime import datetime
import pytest
from src.task_scheduler import compute_next_run
@pytest.mark.parametrize(
"day,after,expected",
[
(31, datetime(2026, 2, 15, 12, 0), datetime(2026, 2, 28, 9, 0)),
(30, datetime(2026, 2, 1, 12, 0), datetime(2026, 2, 28, 9, 0)),
(29, datetime(2026, 2, 1, 12, 0), datetime(2026, 2, 28, 9, 0)),
(29, datetime(2028, 2, 1, 12, 0), datetime(2028, 2, 29, 9, 0)),
(31, datetime(2026, 4, 1, 12, 0), datetime(2026, 4, 30, 9, 0)),
],
)
def test_monthly_clamps_to_last_day_of_current_short_month(day, after, expected):
out = compute_next_run("monthly", "09:00", scheduled_day=day, after=after)
assert out == expected
def test_monthly_clamped_slot_already_passed_rolls_to_next_month():
out = compute_next_run(
"monthly", "09:00", scheduled_day=31, after=datetime(2026, 2, 28, 10, 0)
)
assert out == datetime(2026, 3, 31, 9, 0)
def test_monthly_regular_day_still_fires_this_month():
out = compute_next_run(
"monthly", "09:00", scheduled_day=15, after=datetime(2026, 6, 10, 12, 0)
)
assert out == datetime(2026, 6, 15, 9, 0)
def test_monthly_regular_day_passed_rolls_to_next_month():
out = compute_next_run(
"monthly", "09:00", scheduled_day=15, after=datetime(2026, 6, 20, 12, 0)
)
assert out == datetime(2026, 7, 15, 9, 0)
def test_monthly_december_year_rollover():
out = compute_next_run(
"monthly", "09:00", scheduled_day=31, after=datetime(2026, 12, 31, 10, 0)
)
assert out == datetime(2027, 1, 31, 9, 0)