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| author | Erlend Egeberg Aasland <erlend.aasland@innova.no> | 2021-05-26 14:15:27 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-05-26 14:15:27 (GMT) |
| commit | 4f725261c6cf23d259e8fdc205e12b76ef4d2d31 (patch) | |
| tree | 4e8e33e74cce4a7b6ef57d5e97fde49af6a4fbb4 /Lib/test/support | |
| parent | 46db39d7bd67fb9fea133cd4f18cdf7eacb0f6d9 (diff) | |
| download | cpython-4f725261c6cf23d259e8fdc205e12b76ef4d2d31.zip cpython-4f725261c6cf23d259e8fdc205e12b76ef4d2d31.tar.gz cpython-4f725261c6cf23d259e8fdc205e12b76ef4d2d31.tar.bz2 | |
bpo-43988: Add test.support.check_disallow_instantiation() (GH-25757)
Diffstat (limited to 'Lib/test/support')
| -rw-r--r-- | Lib/test/support/__init__.py | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py index 80f3a04..8c6e554 100644 --- a/Lib/test/support/__init__.py +++ b/Lib/test/support/__init__.py @@ -40,6 +40,7 @@ __all__ = [ "requires_IEEE_754", "requires_zlib", "anticipate_failure", "load_package_tests", "detect_api_mismatch", "check__all__", "skip_if_buggy_ucrt_strfptime", + "check_disallow_instantiation", # sys "is_jython", "is_android", "check_impl_detail", "unix_shell", "setswitchinterval", @@ -1982,3 +1983,13 @@ def skip_if_broken_multiprocessing_synchronize(): synchronize.Lock(ctx=None) except OSError as exc: raise unittest.SkipTest(f"broken multiprocessing SemLock: {exc!r}") + + +def check_disallow_instantiation(testcase, tp, *args, **kwds): + """ + Helper for testing types with the Py_TPFLAGS_DISALLOW_INSTANTIATION flag. + + See bpo-43916. + """ + msg = f"cannot create '{tp.__module__}\.{tp.__name__}' instances" + testcase.assertRaisesRegex(TypeError, msg, tp, *args, **kwds) |