Method test_uuid7_uniqueness

Lib/test/test_uuid.py:930–941

(self)

                equal(u.int & 0xffff_ffff, tail)

    def test_uuid7_uniqueness(self):
        # Test that UUIDv7-generated values are unique.
        #
        # While UUIDv8 has an entropy of 122 bits, those 122 bits may not
        # necessarily be sampled from a PRNG. On the other hand, UUIDv7
        # uses os.urandom() as a PRNG which features better randomness.
        N = 1000
        uuids = {self.uuid.uuid7() for _ in range(N)}
        self.assertEqual(len(uuids), N)

        versions = {u.version for u in uuids}
        self.assertSetEqual(versions, {7})

    def test_uuid7_monotonicity(self):
        equal = self.assertEqual