Audit and suppress nested detector proposals

backend/tests/test_retile_yolo_dataset.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import importlib.util
+from pathlib import Path
+
+
+SCRIPT = Path(__file__).parents[2] / "scripts" / "retile_yolo_dataset.py"
+SPEC = importlib.util.spec_from_file_location("retile_yolo", SCRIPT)
+assert SPEC and SPEC.loader
+MODULE = importlib.util.module_from_spec(SPEC)
+SPEC.loader.exec_module(MODULE)
+
+
+def test_tile_starts_cover_edges_with_overlap() -> None:
+    assert MODULE.tile_starts(640, 384, 128) == [0, 256]
+    assert MODULE.tile_starts(700, 384, 128) == [0, 256, 316]
+
+
+def test_tile_starts_reject_image_smaller_than_tile() -> None:
+    assert MODULE.tile_starts(320, 384, 128) == []