chore: import upstream snapshot with attribution

tests/benchmarks/test_develop_urls.py

@@ -0,0 +1,26 @@
+# ------------------------------------------------------------------------
+# RF-DETR
+# Copyright (c) 2025 Roboflow. All Rights Reserved.
+# Licensed under the Apache License, Version 2.0 [see LICENSE for details]
+# ------------------------------------------------------------------------
+"""No-network tests for private COCO developer helper URL selection."""
+
+from rfdetr.datasets._develop import _COCO_URLS, get_coco_download_url
+
+
+def test_coco_helper_train2017_url_selection() -> None:
+    """``train2017`` should resolve to the official COCO train archive URL."""
+    assert get_coco_download_url("train2017") == _COCO_URLS["train2017"]
+    assert get_coco_download_url("train2017").endswith("/train2017.zip")
+
+
+def test_coco_helper_val2017_url_selection() -> None:
+    """``val2017`` should resolve to the official COCO val archive URL."""
+    assert get_coco_download_url("val2017") == _COCO_URLS["val2017"]
+    assert get_coco_download_url("val2017").endswith("/val2017.zip")
+
+
+def test_coco_helper_annotations_url_selection() -> None:
+    """``annotations`` should resolve to the COCO train/val annotations archive URL."""
+    assert get_coco_download_url("annotations") == _COCO_URLS["annotations"]
+    assert get_coco_download_url("annotations").endswith("/annotations_trainval2017.zip")