feat: multi-model modes (A/B/C/D, default B) + box counting + manual-mode banner

tests/test_counting.py

@@ -1,15 +1,15 @@
-"""Smoke tests for LineCrossCounter (src/counting.py). Pure-Python: needs only numpy."""
+"""Smoke tests for LineCrossCounter + MultiClassLineCounter (src/counting.py). Pure-Python: needs only numpy."""
 
-from src.counting import LineCrossCounter
+from src.counting import LineCrossCounter, MultiClassLineCounter
 from src.interfaces import Detection
 
 
-def _det(tid, y1, cx=500.0):
+def _det(tid, y1, cx=500.0, class_name="sack"):
     return Detection(
         bbox=(cx - 20, y1, cx + 20, y1 + 60),
         confidence=0.9,
         class_id=0,
-        class_name="sack",
+        class_name=class_name,
         track_id=tid,
     )
 
@@ -58,3 +58,41 @@ def test_net_and_reset():
     assert c.net_count == 1
     c.reset()
     assert (c.loading_count, c.unloading_count, c.net_count) == (0, 0, 0)
+
+
+def _mcounter():
+    return MultiClassLineCounter(line_y=100, line_x_start=0, line_x_end=1000, margin=20)
+
+
+def test_multiclass_sack_and_box_independent():
+    c = _mcounter()
+    c.update([_det(1, y1=10, class_name="sack"), _det(7, y1=10, class_name="box")])
+    events = c.update([_det(1, y1=150, class_name="sack"), _det(7, y1=150, class_name="box")])
+    assert len(events) == 2  # flat list, callsites unaffected
+    assert {e["class_name"] for e in events} == {"sack", "box"}
+    assert c.loading_count == 1
+    assert c.box_loading_count == 1
+    assert c.unloading_count == 0 and c.box_unloading_count == 0
+
+
+def test_multiclass_shared_track_id_no_collision():
+    # sack track 9 and box track 9 are different objects; both must count
+    c = _mcounter()
+    c.update([_det(9, y1=10, class_name="sack"), _det(9, y1=10, class_name="box")])
+    c.update([_det(9, y1=150, class_name="sack"), _det(9, y1=150, class_name="box")])
+    assert c.loading_count == 1
+    assert c.box_loading_count == 1
+
+
+def test_multiclass_geometry_sync_and_reset():
+    c = _mcounter()
+    c.line_y = 200
+    assert c._sack.line_y == 200 and c._box.line_y == 200
+    c.line_x_start = 10
+    c.line_x_end = 900
+    assert (c._sack.line_x_start, c._box.line_x_end) == (10, 900)
+    c.update([_det(1, y1=100, class_name="sack")])
+    c.update([_det(1, y1=250, class_name="sack")])
+    assert c.loading_count == 1
+    c.reset()
+    assert (c.loading_count, c.box_loading_count, c.box_net_count) == (0, 0, 0)