Add pyright hook

Author: tjkuson

.pre-commit-config.yaml

@@ -48,6 +48,7 @@ repos:
     exclude: ^(docs|tests)/.*
     additional_dependencies:
     - pytest
+    - backports-asyncio-runner
 - repo: https://github.com/pre-commit/pygrep-hooks
   rev: v1.10.0
   hooks:
@@ -78,6 +79,14 @@ repos:
   rev: v1.11.0
   hooks:
   - id: zizmor
+- repo: https://github.com/RobertCraigie/pyright-python
+  rev: v1.1.403
+  hooks:
+  - id: pyright
+    exclude: ^(docs|tests)/.*
+    additional_dependencies:
+    - pytest
+    - backports-asyncio-runner
 ci:
   skip:
   - actionlint-docker

pytest_asyncio/plugin.py

@@ -392,6 +392,7 @@ def _from_function(cls, function: Function, /) -> Function:
         Function item.
         """
         assert function.get_closest_marker("asyncio")
+        assert function.parent is not None
         subclass_instance = cls.from_parent(
             function.parent,
             name=function.name,