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Krzysztof kuhy Rudnicki
4b1de83e27
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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
65 lines
2.6 KiB
Python
65 lines
2.6 KiB
Python
"""Tests for _slots.resolve_future_when — a pre-logged future meal's slot.
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Split out of test_slots.py for the repo's 250-line cap.
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"""
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from __future__ import annotations
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from datetime import UTC, datetime
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import pytest
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from diet_guard._meal_schedule import DEFAULT_SCHEDULE, MealSchedule
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from diet_guard._slots import day_slots, resolve_future_when
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def _at(hour: int) -> datetime:
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"""Return a fixed local datetime at ``hour`` (date is irrelevant here)."""
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return datetime(2026, 1, 1, hour, 0, tzinfo=UTC)
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class TestResolveFutureWhen:
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"""Validation and construction for a pre-logged future meal's datetime."""
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def test_valid_future_date_and_slot_hour(self) -> None:
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"""A future date on a real slot hour resolves to that datetime."""
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now = _at(10)
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when = resolve_future_when("2026-01-02", 12, DEFAULT_SCHEDULE, now)
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assert when == datetime(2026, 1, 2, 12, 0, tzinfo=UTC)
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def test_preserves_nows_timezone(self) -> None:
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"""The returned datetime carries ``now``'s tzinfo, not a bare one."""
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now = _at(10)
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when = resolve_future_when("2026-01-02", 8, DEFAULT_SCHEDULE, now)
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assert when.tzinfo == now.tzinfo
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def test_rejects_malformed_date(self) -> None:
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"""A date string that doesn't parse raises ValueError."""
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with pytest.raises(ValueError, match="invalid date"):
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resolve_future_when("not-a-date", 8, DEFAULT_SCHEDULE, _at(10))
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def test_rejects_hour_not_a_slot(self) -> None:
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"""An hour that isn't one of the schedule's slots raises ValueError."""
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with pytest.raises(ValueError, match="not a meal slot"):
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resolve_future_when("2026-01-02", 13, DEFAULT_SCHEDULE, _at(10))
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def test_rejects_todays_date(self) -> None:
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"""Today's own date is not "future", even on a real slot hour."""
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now = datetime(2026, 1, 1, 10, 0, tzinfo=UTC)
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with pytest.raises(ValueError, match="not a future date"):
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resolve_future_when("2026-01-01", 12, DEFAULT_SCHEDULE, now)
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def test_rejects_past_date(self) -> None:
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"""A date before today raises ValueError."""
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now = datetime(2026, 1, 5, 10, 0, tzinfo=UTC)
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with pytest.raises(ValueError, match="not a future date"):
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resolve_future_when("2026-01-01", 12, DEFAULT_SCHEDULE, now)
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def test_accepts_every_configured_slot_hour(self) -> None:
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"""Every hour the schedule actually opens is accepted, not just one."""
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schedule = MealSchedule(8, 20, 5)
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now = _at(10)
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for hour in day_slots(schedule):
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when = resolve_future_when("2026-01-02", hour, schedule, now)
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assert when.hour == hour
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