Python 3.14.0a6+ test fix

- Fixes: rhbz#2353145

3500.patch

@@ -0,0 +1,37 @@
+From e35abbef48a4cda2e376a7ff668961378f3c86cb Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
+Date: Tue, 18 Mar 2025 12:54:57 +0100
+Subject: [PATCH] Tests: Adjust expected exception message for Python 3.14.0a6
+
+    E       AssertionError: Regex pattern did not match.
+    E        Regex: '3 cannot cast to typing.Union\\[str, int\\]'
+    E        Input: '3 cannot cast to str | int'
+
+Change caused likely by https://github.com/python/cpython/commit/dc6d66f44c0a25b69dfec7e4ffc4a6fa5e4feada
+---
+ docs/changelog/3500.bugfix.rst          | 2 ++
+ tests/config/loader/test_str_convert.py | 2 +-
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+ create mode 100644 docs/changelog/3500.bugfix.rst
+
+diff --git a/docs/changelog/3500.bugfix.rst b/docs/changelog/3500.bugfix.rst
+new file mode 100644
+index 000000000..9df1cf05d
+--- /dev/null
++++ b/docs/changelog/3500.bugfix.rst
+@@ -0,0 +1,2 @@
++Make tox tests pass with Python 3.14.0a6
++- by :user:`hroncok`
+diff --git a/tests/config/loader/test_str_convert.py b/tests/config/loader/test_str_convert.py
+index 8540e2105..b06929f48 100644
+--- a/tests/config/loader/test_str_convert.py
++++ b/tests/config/loader/test_str_convert.py
+@@ -77,7 +77,7 @@ def test_str_convert_ok_py39(raw: str, value: Any, of_type: type[Any]) -> None:
+     [
+         ("a", TypeVar, TypeError, r"a cannot cast to .*typing.TypeVar.*"),
+         ("3", Literal["1", "2"], ValueError, r"3 must be one of \('1', '2'\)"),
+-        ("3", Union[str, int], TypeError, r"3 cannot cast to typing.Union\[str, int\]"),
++        ("3", Union[str, int], TypeError, r"3 cannot cast to (typing.Union\[str, int\]|str \| int)"),
+         ("", Command, ValueError, r"attempting to parse '' into a command failed"),
+     ],
+ )

python-tox.spec

@@ -35,6 +35,9 @@ Source:         %{pypi_source tox}
 # Adjust setuptools-version specific ifs to check for setuptools version rather than Python version.
 Patch:          fix-tests.patch
 
+# Python 3.14.0a6+ test fix
+Patch:          https://github.com/tox-dev/tox/pull/3500.patch
+
 BuildArch:      noarch
 
 BuildRequires:  python3-devel