Method test_defaults_UTF8

Lib/test/test_locale.py:538–561

(self)

class TestMiscellaneous(unittest.TestCase):
    def test_defaults_UTF8(self):
        # Issue #18378: on (at least) macOS setting LC_CTYPE to "UTF-8" is
        # valid. Furthermore LC_CTYPE=UTF is used by the UTF-8 locale coercing
        # during interpreter startup (on macOS).
        import _locale

        self.assertEqual(locale._parse_localename('UTF-8'), (None, 'UTF-8'))

        if hasattr(_locale, '_getdefaultlocale'):
            orig_getlocale = _locale._getdefaultlocale
            del _locale._getdefaultlocale
        else:
            orig_getlocale = None

        try:
            with os_helper.EnvironmentVarGuard() as env:
                env.unset('LC_ALL', 'LC_CTYPE', 'LANG', 'LANGUAGE')
                env.set('LC_CTYPE', 'UTF-8')

                with check_warnings(('', DeprecationWarning)):
                    self.assertEqual(locale.getdefaultlocale(), (None, 'UTF-8'))
        finally:
            if orig_getlocale is not None:
                _locale._getdefaultlocale = orig_getlocale

    def test_getencoding(self):
        # Invoke getencoding to make sure it does not cause exceptions.