def test_perform_readahead_happy_path(m_process, m_from_cache, m_release_leader, m_become_leader):
redis_cli = MockRedis()
def _smem(_):
return set(['tscached:kquery:superspecial'])
redis_cli.smembers = _smem
m_become_leader.return_value = True
kqueries = []
for ndx in xrange(10):
kq = KQuery(redis_cli)
kq.cached_data = {'last_add_data': int(datetime.datetime.now().strftime('%s')) - 1800,
'redis_key': 'tscached:kquery:' + str(ndx)}
kqueries.append(kq)
m_from_cache.return_value = kqueries
m_process.return_value = {'sample_size': 666}, 'warm_append'
assert perform_readahead({}, redis_cli) is None
assert m_become_leader.call_count == 1
assert m_release_leader.call_count == 1
assert m_from_cache.call_count == 1
assert m_from_cache.call_args_list[0][0] == (['tscached:kquery:superspecial'], redis_cli)
assert m_process.call_count == 10
k_t_r = {'start_relative': {'unit': 'minutes', 'value': '24194605'}}
for ndx in xrange(10):
assert m_process.call_args_list[ndx][0] == ({}, redis_cli, kqueries[ndx], k_t_r)
def test_perform_readahead_redis_error(m_process, m_from_cache, m_release_leader, m_become_leader):
redis_cli = MockRedis()
def _smem(_):
raise redis.exceptions.RedisError("OOPS!")
redis_cli.smembers = _smem
m_become_leader.return_value = True
assert perform_readahead({}, redis_cli) is None
assert m_become_leader.call_count == 1
assert m_release_leader.call_count == 1
assert m_from_cache.call_count == 0
assert m_process.call_count == 0
def test_perform_readahead_backend_error(m_process, m_from_cache, m_release_leader, m_become_leader):
redis_cli = MockRedis()
def _smem(_):
return set(['tscached:kquery:superspecial'])
redis_cli.smembers = _smem
m_become_leader.return_value = True
kqueries = []
for ndx in xrange(10):
kq = KQuery(redis_cli)
kq.cached_data = {'last_add_data': int(datetime.datetime.now().strftime('%s')) - 1800,
'redis_key': 'tscached:kquery:' + str(ndx)}
kqueries.append(kq)
m_from_cache.return_value = kqueries
m_process.side_effect = BackendQueryFailure('OOPS!')
assert perform_readahead({}, redis_cli) is None
assert m_become_leader.call_count == 1
assert m_release_leader.call_count == 1
assert m_from_cache.call_count == 1
assert m_process.call_count == 1
