Some test regressions on Python 3.14.0a1

[musicinmybrain]

Things to check first

• I have searched the existing issues and didn't find my bug already reported there

• I have checked that my bug is still present in the latest release

Typeguard version

Current master, b6a7e43

Python version

3.14.0a1

What happened?

With pytest -W 'ignore::DeprecationWarning':

================================================================================================= FAILURES ==================================================================================================
________________________________________________________________________________________ TestRecursiveType.test_fail ________________________________________________________________________________________
/home/ben/src/forks/typeguard/tests/test_checkers.py:1411: in test_fail
    check_type({"a": (1, 2, 3)}, JSONType)
/home/ben/src/forks/typeguard/src/typeguard/_functions.py:107: in check_type   
    check_type_internal(value, expected_type, memo)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:946: in check_type_internal
    checker(value, origin_type, args, memo)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:427: in check_union   
    raise TypeCheckError(f"did not match any element in the union:\n{formatted_errors}")
E   typeguard.TypeCheckError: dict did not match any element in the union:
E     str: is not an instance of str
E     float: is neither float or int
E     bool: is not an instance of bool
E     NoneType: is not an instance of NoneType
E     List[annotationlib.JSONType]: is not a list
E     Dict[str, annotationlib.JSONType]: value of key 'a' did not match any element in the union:
E       str: is not an instance of str
E       float: is neither float or int
E       bool: is not an instance of bool
E       NoneType: is not an instance of NoneType
E       List[annotationlib.JSONType]: is not a list
E       Dict[str, annotationlib.JSONType]: is not a dict

During handling of the above exception, another exception occurred:
/home/ben/src/forks/typeguard/tests/test_checkers.py:1392: in test_fail
    with pytest.raises(
E   AssertionError: Regex pattern did not match.
E    Regex: "dict did not match any element in the union:\n  str: is not an instance of str\n  float: is neither float or int\n  bool: is not an instance of bool\n  NoneType: is not an instance of NoneType\n  List\\[JSONType\\]: is not a list\n  Dict\\[str, JSONType\\]: value of key 'a' did not match any element in the union:\n    str: is not an instance of str\n    float: is neither float or int\n    bool: is not an instance of bool\n    NoneType: is not an instance of NoneType\n    List\\[JSONType\\]: is not a list\n    Dict\\[str, JSONType\\]: is not a dict"
E    Input: "dict did not match any element in the union:\n  str: is not an instance of str\n  float: is neither float or int\n  bool: is not an instance of bool\n  NoneType: is not an instance of NoneType\n  List[annotationlib.JSONType]: is not a list\n  Dict[str, annotationlib.JSONType]: value of key 'a' did not match any element in the union:\n    str: is not an instance of str\n    float: is neither float or int\n    bool: is not an instance of bool\n    NoneType: is not an instance of NoneType\n    List[annotationlib.JSONType]: is not a list\n    Dict[str, annotationlib.JSONType]: is not a dict"
____________________________________________________________________________________ test_typevar_forwardref[importhook] ____________________________________________________________________________________
/home/ben/src/forks/typeguard/tests/test_instrumentation.py:333: in test_typevar_forwardref
    instance = dummymodule.typevar_forwardref(dummymodule.DummyClass)
/home/ben/src/forks/typeguard/tests/dummymodule.py:339: in typevar_forwardref
    def typevar_forwardref(x: Type[T]) -> T:
/home/ben/src/forks/typeguard/src/typeguard/_functions.py:137: in check_argument_types
    check_type_internal(value, annotation, memo)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:946: in check_type_internal
    checker(value, origin_type, args, memo)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:481: in check_class
    check_typevar(value, expected_class, (), memo, subclass_check=True)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:538: in check_typevar
    check_type_internal(value, annotation, memo)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:946: in check_type_internal
    checker(value, origin_type, args, memo)
/home/ben/src/forks/typeguard/src/typeguard/_checkers.py:504: in check_class   
    raise TypeCheckError(f"is not a subclass of {qualified_name(expected_class)}")
E   typeguard.TypeCheckError: argument "x" (class dummymodule.DummyClass) is not a subclass of dummymodule.DummyClass
========================================================================================== short test summary info ==========================================================================================
FAILED tests/test_checkers.py::TestRecursiveType::test_fail - AssertionError: Regex pattern did not match.
FAILED tests/test_instrumentation.py::test_typevar_forwardref[importhook] - typeguard.TypeCheckError: argument "x" (class dummymodule.DummyClass) is not a subclass of dummymodule.DummyClass
============================================================================ 2 failed, 474 passed, 4 skipped, 9 xfailed in 1.39s ============================================================================

Without -W 'ignore::DeprecationWarning', I also see a lot of

E   DeprecationWarning: ForwardRef._evaluate is a private API and is retained for compatibility, but will be removed in Python 3.16. Use ForwardRef.evaluate() or typing.evaluate_forward_ref() instead.

How can we reproduce the bug?

$ gh repo clone agroholm/typeguard
$ cd typeguard
$ python3.14 --version
Python 3.14.0a1
$ python3.14 -m venv _e
$ . _e/bin/activate
(_e) $ pip install -e .[test]
(_e) $ pytest -W 'ignore::DeprecationWarning'

[musicinmybrain]

FAILED tests/test_checkers.py::TestRecursiveType::test_fail - AssertionError: Regex pattern did not match.

The output now has annotationlib.JSONType in place of just JSONType. I can fix this by adjusting the regex.

E   DeprecationWarning: ForwardRef._evaluate is a private API and is retained for compatibility, but will be removed in Python 3.16. Use ForwardRef.evaluate() or typing.evaluate_forward_ref() instead.

Python 3.14 is adding a public ForwardRef.evaluate() function, so we should just start using it where it is available.

FAILED tests/test_instrumentation.py::test_typevar_forwardref[importhook] - typeguard.TypeCheckError: argument "x" (class dummymodule.DummyClass) is not a subclass of dummymodule.DummyClass

This one I’m not quite sure how to fix.

[musicinmybrain]

I see that @JelleZijlstra already started working on this in #492.