From 256847b89bfeee48d42b7cb2dce3433a24e19c10 Mon Sep 17 00:00:00 2001
From: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>
Date: Wed, 14 Oct 2026 09:20:36 -0500
Subject: [PATCH] add test

---
 frigate/test/test_tracked_object_zones.py | 120 ++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 frigate/test/test_tracked_object_zones.py

diff --git a/frigate/test/test_tracked_object_zones.py b/frigate/test/test_tracked_object_zones.py
new file mode 100644
index 0000000000..82fab479e8
--- /dev/null
+++ b/frigate/test/test_tracked_object_zones.py
@@ -0,0 +1,120 @@
+"""Zone entry for tracked objects the detector has lost."""
+
+import unittest
+
+from frigate.config import FrigateConfig
+from frigate.track.tracked_object import TrackedObject
+
+CAMERA = "cam"
+FPS = 5
+INERTIA = 3
+OUTSIDE_X = 200
+INSIDE_X = 480
+
+
+def _config() -> FrigateConfig:
+    return FrigateConfig(
+        **{
+            "mqtt": {"enabled": False},
+            "cameras": {
+                CAMERA: {
+                    "ffmpeg": {
+                        "inputs": [
+                            {"path": "rtsp://10.0.0.1:554/video", "roles": ["detect"]}
+                        ]
+                    },
+                    "detect": {"width": 640, "height": 480, "fps": FPS},
+                    "objects": {"track": ["car"]},
+                    "zones": {
+                        "zone": {
+                            "coordinates": "0.5,0,1,0,1,1,0.5,1",
+                            "inertia": INERTIA,
+                        }
+                    },
+                }
+            },
+        }
+    )
+
+
+def _obj_data(x: int, frame_time: float) -> dict:
+    return {
+        "id": "1000.0-abcdef",
+        "label": "car",
+        "frame_time": frame_time,
+        "start_time": 1000.0,
+        "score": 0.9,
+        "box": (x - 40, 200, x + 40, 260),
+        "area": 4800,
+        "ratio": 1.33,
+        "region": (0, 0, 640, 480),
+        "centroid": (x, 230),
+        "position_changes": 1,
+        "motionless_count": 0,
+        "attributes": [],
+    }
+
+
+class TestTrackedObjectZones(unittest.TestCase):
+    def setUp(self):
+        config = _config()
+        camera_config = config.cameras[CAMERA]
+        self.obj = TrackedObject(
+            config.model_for_camera(CAMERA),
+            camera_config,
+            config.ui,
+            {},
+            {**_obj_data(OUTSIDE_X, 1000.0), "score_history": [0.9]},
+        )
+        self.frame = 0
+
+    def _step(self, x: int, detected: bool = True) -> None:
+        """Advance one frame. A lost object keeps the box from its last detection."""
+        self.frame += 1
+        current_frame_time = 1000.0 + self.frame / FPS
+
+        if detected:
+            self.last_detection = _obj_data(x, current_frame_time)
+
+        self.obj.update(current_frame_time, dict(self.last_detection), False)
+
+    def test_lost_object_does_not_enter_zone(self):
+        self._step(INSIDE_X)
+
+        for _ in range(INERTIA * 3):
+            self._step(INSIDE_X, detected=False)
+
+        self.assertEqual(self.obj.current_zones, [])
+        self.assertEqual(self.obj.entered_zones, [])
+
+    def test_lost_object_enters_zone_when_detected_again(self):
+        self._step(INSIDE_X)
+
+        for _ in range(INERTIA):
+            self._step(INSIDE_X, detected=False)
+
+        self._step(INSIDE_X)
+        self.assertEqual(self.obj.entered_zones, ["zone"])
+
+    def test_detected_object_enters_zone(self):
+        for _ in range(INERTIA - 1):
+            self._step(INSIDE_X)
+
+        self.assertEqual(self.obj.entered_zones, [])
+
+        self._step(INSIDE_X)
+        self.assertEqual(self.obj.current_zones, ["zone"])
+        self.assertEqual(self.obj.entered_zones, ["zone"])
+
+    def test_object_in_zone_stays_while_lost(self):
+        for _ in range(INERTIA):
+            self._step(INSIDE_X)
+
+        for _ in range(INERTIA):
+            self._step(INSIDE_X, detected=False)
+
+        self.assertEqual(self.obj.current_zones, ["zone"])
+
+
+if __name__ == "__main__":
+    unittest.main()