Method test_shakes_invalid_digest_length

Lib/test/test_hashlib.py:413–424

(self)

                self.assertEqual(h.hexdigest(0), '')

    def test_shakes_invalid_digest_length(self):
        # See https://github.com/python/cpython/issues/79103.
        for constructor in self.shake_constructors:
            with self.subTest(constructor=constructor):
                h = constructor(usedforsecurity=False)
                # Note: digest() and hexdigest() take a signed input and
                # raise if it is negative; the rationale is that we use
                # internally PyBytes_FromStringAndSize() and _Py_strhex()
                # which both take a Py_ssize_t.
                for negative_size in (-1, -10, -(1 << 31), -sys.maxsize):
                    self.assertRaises(ValueError, h.digest, negative_size)
                    self.assertRaises(ValueError, h.hexdigest, negative_size)

    def test_shakes_overflow_digest_length(self):
        # See https://github.com/python/cpython/issues/135759.