extract empty annotation creation

tests/conftest.py

@@ -7,6 +7,7 @@
 from pathlib import Path
 
 import pytest
+import raillabel
 
 json_data_directories = [
     Path(__file__).parent / "__test_assets__",
@@ -65,3 +66,18 @@ def _load_json_data(path: Path) -> dict:
     with path.open() as f:
         json_data = json.load(f)
     return json_data
+
+@pytest.fixture
+def empty_annotation() -> raillabel.format.Bbox:
+    """Return a minimal possible annotation."""
+    return raillabel.format.Bbox(
+        uid="1f654afe-0a18-497f-9db8-afac360ce94c",
+        object=raillabel.format.Object(
+            uid="7df959d7-0ec2-4722-8b62-bb2e529de2ec",
+            name="person0000",
+            type="person",
+        ),
+        sensor=None,
+        pos=raillabel.format.Point2d(0.0, 0.0),
+        size=raillabel.format.Size2d(0.0, 0.0),
+    )

tests/test_raillabel_providerkit/validation/validate_empty_frame/test_validate_empty_frames.py

@@ -8,23 +8,16 @@
     _is_frame_empty,
 )
 
-# == Tests ============================
 
 def test_is_frame_empty__true():
     frame = raillabel.format.Frame(uid=0, annotations={})
     assert _is_frame_empty(frame)
 
-def test_is_frame_empty__false():
+def test_is_frame_empty__false(empty_annotation):
     frame = raillabel.format.Frame(
-        uid=0, annotations={
-            "581b0df1-c4cf-4a97-828e-13dd740defe5": raillabel.format.Bbox(
-                uid=None,
-                object=None,
-                sensor=None,
-                attributes=None,
-                pos=raillabel.format.Point2d(0, 0),
-                size=raillabel.format.Size2d(0, 0),
-            )
+        uid=0,
+        annotations={
+            "581b0df1-c4cf-4a97-828e-13dd740defe5": empty_annotation
         }
     )
     assert not _is_frame_empty(frame)