(self)
| 999 | self.assertLess(u1, u2) |
| 1000 | |
| 1001 | def test_uuid7_timestamp_backwards(self): |
| 1002 | equal = self.assertEqual |
| 1003 | # 1 Jan 2023 12:34:56.123_456_789 |
| 1004 | timestamp_ns = 1672533296_123_456_789 # ns precision |
| 1005 | timestamp_ms, _ = divmod(timestamp_ns, 1_000_000) |
| 1006 | fake_last_timestamp_v7 = timestamp_ms + 1 |
| 1007 | |
| 1008 | # counter_{hi,lo} are chosen so that "counter + 1" does not overflow |
| 1009 | counter_hi = random.getrandbits(11) |
| 1010 | counter_lo = random.getrandbits(29) |
| 1011 | counter = (counter_hi << 30) | counter_lo |
| 1012 | self.assertLess(counter + 1, 0x3ff_ffff_ffff) |
| 1013 | |
| 1014 | tail_bytes = os.urandom(4) |
| 1015 | tail = int.from_bytes(tail_bytes) |
| 1016 | |
| 1017 | with ( |
| 1018 | mock.patch.multiple( |
| 1019 | self.uuid, |
| 1020 | _last_timestamp_v7=fake_last_timestamp_v7, |
| 1021 | _last_counter_v7=counter, |
| 1022 | ), |
| 1023 | mock.patch('time.time_ns', return_value=timestamp_ns), |
| 1024 | mock.patch('os.urandom', return_value=tail_bytes) as urand |
| 1025 | ): |
| 1026 | u = self.uuid.uuid7() |
| 1027 | urand.assert_called_once_with(4) |
| 1028 | equal(u.variant, self.uuid.RFC_4122) |
| 1029 | equal(u.version, 7) |
| 1030 | equal(self.uuid._last_timestamp_v7, fake_last_timestamp_v7 + 1) |
| 1031 | unix_ts_ms = (fake_last_timestamp_v7 + 1) & 0xffff_ffff_ffff |
| 1032 | equal(u.time, unix_ts_ms) |
| 1033 | equal((u.int >> 80) & 0xffff_ffff_ffff, unix_ts_ms) |
| 1034 | # 42-bit counter advanced by 1 |
| 1035 | equal(self.uuid._last_counter_v7, counter + 1) |
| 1036 | equal((u.int >> 64) & 0xfff, counter_hi) |
| 1037 | # 42-bit counter advanced by 1 (counter_hi is untouched) |
| 1038 | equal((u.int >> 32) & 0x3fff_ffff, counter_lo + 1) |
| 1039 | equal(u.int & 0xffff_ffff, tail) |
| 1040 | |
| 1041 | def test_uuid7_overflow_counter(self): |
| 1042 | equal = self.assertEqual |
nothing calls this directly
no test coverage detected