Method test_clinic_signature_errors

Lib/test/test_hashlib.py:297–346

(self)

    @unittest.skipIf(get_fips_mode(), "skip in FIPS mode")
    def test_clinic_signature_errors(self):
        nomsg = b''
        mymsg = b'msg'
        conflicting_call = re.escape(
            "'data' and 'string' are mutually exclusive "
            "and support for 'string' keyword parameter "
            "is slated for removal in a future version."
        )
        duplicated_param = re.escape("given by name ('data') and position")
        unexpected_param = re.escape("got an unexpected keyword argument '_'")
        for args, kwds, errmsg in [
            # Reject duplicated arguments before unknown keyword arguments.
            ((nomsg,), dict(data=nomsg, _=nomsg), duplicated_param),
            ((mymsg,), dict(data=nomsg, _=nomsg), duplicated_param),
            # Reject duplicated arguments before conflicting ones.
            *itertools.product(
                [[nomsg], [mymsg]],
                [dict(data=nomsg), dict(data=nomsg, string=nomsg)],
                [duplicated_param]
            ),
            # Reject unknown keyword arguments before conflicting ones.
            *itertools.product(
                [()],
                [
                    dict(_=None),
                    dict(data=nomsg, _=None),
                    dict(string=nomsg, _=None),
                    dict(string=nomsg, data=nomsg, _=None),
                ],
                [unexpected_param]
            ),
            ((nomsg,), dict(_=None), unexpected_param),
            ((mymsg,), dict(_=None), unexpected_param),
            # Reject conflicting arguments.
            [(nomsg,), dict(string=nomsg), conflicting_call],
            [(mymsg,), dict(string=nomsg), conflicting_call],
            [(), dict(data=nomsg, string=nomsg), conflicting_call],
        ]:
            for constructor in self.hash_constructors:
                digest_name = constructor(b'').name
                with self.subTest(constructor.__name__, args=args, kwds=kwds):
                    with self.assertRaisesRegex(TypeError, errmsg):
                        constructor(*args, **kwds)
                with self.subTest(digest_name, args=args, kwds=kwds):
                    with self.assertRaisesRegex(TypeError, errmsg):
                        hashlib.new(digest_name, *args, **kwds)
                    if (self._hashlib and
                            digest_name in self._hashlib._constructors):
                        with self.assertRaisesRegex(TypeError, errmsg):
                            self._hashlib.new(digest_name, *args, **kwds)

    def test_unknown_hash(self):
        self.assertRaises(ValueError, hashlib.new, 'spam spam spam spam spam')