TST: Debug and fix new Windows + Python 3.14 failure

.github/workflows/python-tests.yml

@@ -67,6 +67,7 @@ jobs:
           - os: windows-latest
             python-version: '3.14'
             toxenv: py314-test-pytestdev
+            posargs: -v
           - os: macos-latest
             python-version: '3.14'
             toxenv: py314-test-pytestdev

tests/conftest.py

@@ -1,10 +1,13 @@
-from functools import partial
+import sys
 import textwrap
+from functools import partial
 from packaging.version import Version
+from platform import python_version
 
 import pytest
 import numpy as np
 
+PYTEST_LT_8_5 = Version(pytest.__version__) < Version('8.5.0.dev')
 
 # Keep this until we require numpy to be >=2.0 or there is a directive in doctestplus
 # to support multiple ways of repr
@@ -53,3 +56,10 @@ def make(*args, **kwargs):
         return testdir.makefile('.rst', *args, **kwargs)
 
     return make
+
+
+# Windows + Python 3.14.0 + pytest-dev have ResourceWarning, see
+# https://github.com/scientific-python/pytest-doctestplus/issues/305
+def pytest_runtestloop(session):
+    if sys.platform == 'win32' and python_version() == "3.14.0" and not PYTEST_LT_8_5:
+        session.add_marker(pytest.mark.filterwarnings('ignore::ResourceWarning'))

tests/test_doctestplus.py

@@ -1,7 +1,6 @@
 import glob
 import os
 import sys
-import warnings
 from platform import python_version
 from textwrap import dedent
 
@@ -26,7 +25,6 @@
 
 
 PYTEST_LT_6 = Version(pytest.__version__) < Version('6.0.0')
-PYTEST_LT_8_5 = Version(pytest.__version__) < Version('8.5.0.dev')
 
 
 def test_ignored_whitespace(testdir):
@@ -732,13 +730,7 @@ def f():
     testdir.makefile('.rst', foo='>>> 1+1\n2')
 
     testdir.inline_run('--doctest-plus').assertoutcome(passed=2)
-    if os.name == "nt" and python_version() == "3.14.0" and not PYTEST_LT_8_5:
-        with warnings.catch_warnings():
-            # ResourceWarning unclosed file pytest.EXE --> PytestUnraisableExceptionWarning
-            warnings.filterwarnings("ignore")
-            testdir.inline_run('--doctest-plus', '--doctest-rst').assertoutcome(passed=3)
-    else:
-        testdir.inline_run('--doctest-plus', '--doctest-rst').assertoutcome(passed=3)
+    testdir.inline_run('--doctest-plus', '--doctest-rst').assertoutcome(passed=3)
     testdir.inline_run(
         '--doctest-plus', '--doctest-rst', '--ignore', '.'
     ).assertoutcome(passed=0)