| from __future__ import absolute_import | |
| import os | |
| import random | |
| import re | |
| import string | |
| import time | |
| def special_to_underscore(string, _matcher=re.compile(r'[^a-zA-Z0-9_]+')): | |
| return _matcher.sub('_', string) | |
| def random_string(length): | |
| return "".join(random.choice(string.ascii_letters) for i in range(length)) | |
| def env_kafka_version(): | |
| """Return the Kafka version set in the OS environment as a tuple. | |
| Example: '0.8.1.1' --> (0, 8, 1, 1) | |
| """ | |
| if 'KAFKA_VERSION' not in os.environ: | |
| return () | |
| return tuple(map(int, os.environ['KAFKA_VERSION'].split('.'))) | |
| def assert_message_count(messages, num_messages): | |
| """Check that we received the expected number of messages with no duplicates.""" | |
| # Make sure we got them all | |
| assert len(messages) == num_messages | |
| # Make sure there are no duplicates | |
| # Note: Currently duplicates are identified only using key/value. Other attributes like topic, partition, headers, | |
| # timestamp, etc are ignored... this could be changed if necessary, but will be more tolerant of dupes. | |
| unique_messages = {(m.key, m.value) for m in messages} | |
| assert len(unique_messages) == num_messages | |
| class Timer(object): | |
| def __enter__(self): | |
| self.start = time.time() | |
| return self | |
| def __exit__(self, *args): | |
| self.end = time.time() | |
| self.interval = self.end - self.start | |