[7.2.x] Fix 'importlib.abc.TraversableResources' deprecation warning in Python 3.12 (#10453)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

changelog/10452.bugfix.rst

@@ -0,0 +1 @@
+Fix 'importlib.abc.TraversableResources' deprecation warning in Python 3.12.

src/_pytest/assertion/rewrite.py

@@ -275,7 +275,12 @@ class AssertionRewritingHook(importlib.abc.MetaPathFinder, importlib.abc.Loader)
 
     if sys.version_info >= (3, 10):
 
-        def get_resource_reader(self, name: str) -> importlib.abc.TraversableResources:  # type: ignore
+        if sys.version_info >= (3, 12):
+            from importlib.resources.abc import TraversableResources
+        else:
+            from importlib.abc import TraversableResources
+
+        def get_resource_reader(self, name: str) -> TraversableResources:  # type: ignore
             if sys.version_info < (3, 11):
                 from importlib.readers import FileReader
             else:

tox.ini

@@ -9,6 +9,7 @@ envlist =
     py39
     py310
     py311
+    py312
     pypy3
     py37-{pexpect,xdist,unittestextras,numpy,pluggymain,pylib}
     doctesting