Initial Plast Track MVP

backend/tests/test_oee.py

@@ -0,0 +1,38 @@
+from datetime import datetime, timedelta, timezone
+
+from app.services.oee import calculate_oee_metrics
+
+
+def test_calculate_oee_metrics() -> None:
+    metrics = calculate_oee_metrics(
+        planned_time_sec=3600,
+        downtime_sec=600,
+        total_cycles=100,
+        performance_time_sec=2500,
+        theoretical_cycle_time_sec=25,
+        total_produced_qty=200,
+        scrap_qty=10,
+    )
+
+    assert round(metrics.availability, 4) == 0.8333
+    assert round(metrics.performance, 4) == 0.8333
+    assert round(metrics.quality, 4) == 0.95
+    assert round(metrics.oee, 4) == 0.6597
+
+
+def test_future_window_uses_current_time_bound(monkeypatch) -> None:
+    from app.services import oee
+
+    fixed_now = datetime(2026, 6, 14, 12, 0, tzinfo=timezone.utc)
+
+    class FixedDateTime(datetime):
+        @classmethod
+        def now(cls, tz=None):
+            return fixed_now if tz else fixed_now.replace(tzinfo=None)
+
+    monkeypatch.setattr(oee, "datetime", FixedDateTime)
+
+    start = datetime(2026, 6, 14, 0, 0, tzinfo=timezone.utc)
+    end = datetime(2026, 6, 15, 0, 0, tzinfo=timezone.utc)
+
+    assert oee.overlap_seconds(start, fixed_now, start, end) == timedelta(hours=12).total_seconds()