refactor: throw on summary layer gen when features are not provided

Author: 404Simon

tests/test_napari_layers.py

@@ -262,7 +262,7 @@ def test_branch_text_layer_has_text_config(
 
     def test_summary_with_none_features_crashes(self, skeleton, graph, branch_data):
         config = ExtractionConfig(summary=True)
-        with pytest.raises(AttributeError):
+        with pytest.raises(ValueError, match="features is required"):
             extract_skeleton_layers(
                 skeleton,
                 "test",

vesskel/napari_layers.py

@@ -56,6 +56,10 @@ def extract_skeleton_layers(
                 layers.append(text_layer)
 
     if config.summary:
+        if features is None:
+            raise ValueError(
+                "features is required when summary is enabled"
+            )
         summary_layer = _extract_summary_features_layer(
             skeleton,
             base_name,