Fixed issues from removal of pytest.warns(None) in pytest version 8

Signed-off-by: Andreas Maier <andreas.r.maier@gmx.de>

Author: andy-maier

docs/changes.rst

@@ -20,6 +20,9 @@ Released: not yet
 
 * Removed unneeded backslashes reported by new Pylint version.
 
+* Test: Fixed issues resulting from removal of support for pytest.warns(None)
+  in pytest version 8.
+
 
 nocaselist 1.1.2
 ----------------

tests/utils/simplified_test_function.py

@@ -5,6 +5,7 @@
 from __future__ import absolute_import
 
 import functools
+import warnings
 from collections import namedtuple
 try:
     from inspect import Signature, Parameter
@@ -151,7 +152,7 @@ def wrapper_func(desc, kwargs, exp_exc_types, exp_warn_types, condition):
                     ret = None  # Debugging hint
                     assert len(rec_warnings) >= 1
         else:
-            with pytest.warns(None) as rec_warnings:
+            with warnings.catch_warnings(record=True) as rec_warnings:
                 if exp_exc_types:
                     with pytest.raises(exp_exc_types):
                         if condition == 'pdb':
@@ -173,7 +174,7 @@ def wrapper_func(desc, kwargs, exp_exc_types, exp_warn_types, condition):
                     # Verify that no warnings have occurred
                     if exp_warn_types is None and rec_warnings:
                         lines = []
-                        for w in rec_warnings.list:
+                        for w in rec_warnings:
                             tup = (w.filename, w.lineno, w.category.__name__,
                                    str(w.message))
                             line = "{t[0]}:{t[1]}: {t[2]}: {t[3]}".format(t=tup)