99 lines
4.1 KiB
Python
99 lines
4.1 KiB
Python
from __future__ import annotations
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import unittest
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from datetime import datetime, timedelta, timezone
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from cold_display_guard import BatchEngine, EngineSettings, Observation
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UTC = timezone.utc
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def obs(ts: datetime, counts: dict[str, int], trash: bool | int = False) -> Observation:
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return Observation.from_dict(
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{
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"ts": ts.isoformat(),
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"zone_counts": counts,
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"trash_deposit": trash,
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}
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)
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class BatchEngineTests(unittest.TestCase):
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def setUp(self) -> None:
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self.settings = EngineSettings(
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camera_id="test_cam",
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max_dwell_seconds=10,
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trash_confirmation_seconds=5,
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zone_ids=("r1c1", "r1c2"),
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)
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self.engine = BatchEngine(self.settings)
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self.t0 = datetime(2026, 4, 27, 10, 0, tzinfo=UTC)
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def test_starts_batch_when_zone_becomes_occupied(self) -> None:
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events = self.engine.process(obs(self.t0, {"r1c1": 3}))
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self.assertEqual([event["event"] for event in events], ["batch_started"])
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self.assertEqual(events[0]["zone_id"], "r1c1")
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self.assertEqual(events[0]["current_count"], 3)
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def test_consumes_batch_when_removed_before_threshold(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 2}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=9), {"r1c1": 0}))
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self.assertEqual([event["event"] for event in events], ["batch_consumed"])
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self.assertEqual(events[0]["dwell_seconds"], 9)
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def test_over_threshold_removal_waits_for_disposal_confirmation(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 2}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=10), {"r1c1": 0}))
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self.assertEqual([event["event"] for event in events], ["batch_pending_disposal"])
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self.assertEqual(events[0]["dwell_seconds"], 10)
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self.assertIn("disposal_deadline", events[0])
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def test_trash_deposit_confirms_pending_disposal(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 2}))
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self.engine.process(obs(self.t0 + timedelta(seconds=11), {"r1c1": 0}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=12), {"r1c1": 0}, trash=True))
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self.assertEqual([event["event"] for event in events], ["batch_discarded"])
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def test_missing_trash_deposit_raises_violation_after_deadline(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 2}))
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self.engine.process(obs(self.t0 + timedelta(seconds=11), {"r1c1": 0}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=17), {"r1c1": 0}))
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self.assertEqual([event["event"] for event in events], ["missing_disposal_violation"])
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self.assertEqual(events[0]["violation_reasons"], ["missing_disposal"])
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def test_adding_food_before_zone_clears_raises_mixed_batch_violation(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 2}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=1), {"r1c1": 3}))
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self.assertEqual([event["event"] for event in events], ["mixed_batch_violation"])
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self.assertEqual(events[0]["reason"], "food_added_before_zone_cleared")
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def test_count_decrease_keeps_same_batch_active(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 3}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=1), {"r1c1": 1}))
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self.assertEqual([event["event"] for event in events], ["batch_count_changed"])
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self.assertEqual(events[0]["previous_count"], 3)
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self.assertEqual(events[0]["current_count"], 1)
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def test_overdue_food_reappearing_before_disposal_raises_violation(self) -> None:
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self.engine.process(obs(self.t0, {"r1c1": 2}))
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self.engine.process(obs(self.t0 + timedelta(seconds=11), {"r1c1": 0}))
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events = self.engine.process(obs(self.t0 + timedelta(seconds=12), {"r1c2": 1}))
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self.assertEqual(
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[event["event"] for event in events],
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["overdue_return_violation", "batch_started"],
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)
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self.assertEqual(events[0]["appeared_zones"], ["r1c2"])
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if __name__ == "__main__":
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unittest.main()
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