Run beartype on all tests

Author: adamtheturtle

conftest.py

@@ -2,13 +2,25 @@
 
 from doctest import ELLIPSIS
 
+import pytest
+from beartype import beartype
 from sybil import Sybil
 from sybil.parsers.rest import (
     ClearNamespaceParser,
     DocTestParser,
     PythonCodeBlockParser,
 )
 
+
+def pytest_collection_modifyitems(items: list[pytest.Item]) -> None:
+    """
+    Apply the beartype decorator to all collected test functions.
+    """
+    for item in items:
+        if isinstance(item, pytest.Function):
+            item.obj = beartype(obj=item.obj)
+
+
 pytest_collect_file = Sybil(
     parsers=[
         ClearNamespaceParser(),