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import pytest
from redis.asyncio import Redis
from redis.asyncio.connection import Connection, UnixDomainSocketConnection
from redis.asyncio.retry import Retry
from redis.backoff import AbstractBackoff, ExponentialBackoff, NoBackoff
from redis.exceptions import ConnectionError, TimeoutError
class BackoffMock(AbstractBackoff):
def __init__(self):
self.reset_calls = 0
self.calls = 0
def reset(self):
self.reset_calls += 1
def compute(self, failures):
self.calls += 1
return 0
class TestConnectionConstructorWithRetry:
"Test that the Connection constructors properly handles Retry objects"
@pytest.mark.parametrize("Class", [Connection, UnixDomainSocketConnection])
def test_retry_on_error_set(self, Class):
class CustomError(Exception):
pass
retry_on_error = [ConnectionError, TimeoutError, CustomError]
c = Class(retry_on_error=retry_on_error)
assert c.retry_on_error == retry_on_error
assert isinstance(c.retry, Retry)
assert c.retry._retries == 1
assert set(c.retry._supported_errors) == set(retry_on_error)
@pytest.mark.parametrize("Class", [Connection, UnixDomainSocketConnection])
def test_retry_on_error_not_set(self, Class):
c = Class()
assert c.retry_on_error == []
assert isinstance(c.retry, Retry)
assert c.retry._retries == 0
@pytest.mark.parametrize("retry_on_timeout", [False, True])
@pytest.mark.parametrize("Class", [Connection, UnixDomainSocketConnection])
def test_retry_on_timeout(self, Class, retry_on_timeout):
c = Class(retry_on_timeout=retry_on_timeout)
assert c.retry_on_timeout == retry_on_timeout
assert isinstance(c.retry, Retry)
assert c.retry._retries == (1 if retry_on_timeout else 0)
@pytest.mark.parametrize("retries", range(10))
@pytest.mark.parametrize("Class", [Connection, UnixDomainSocketConnection])
def test_retry_with_retry_on_timeout(self, Class, retries: int):
retry_on_timeout = retries > 0
c = Class(retry_on_timeout=retry_on_timeout, retry=Retry(NoBackoff(), retries))
assert c.retry_on_timeout == retry_on_timeout
assert isinstance(c.retry, Retry)
assert c.retry._retries == retries
@pytest.mark.parametrize("retries", range(10))
@pytest.mark.parametrize("Class", [Connection, UnixDomainSocketConnection])
def test_retry_with_retry_on_error(self, Class, retries: int):
class CustomError(Exception):
pass
retry_on_error = [ConnectionError, TimeoutError, CustomError]
c = Class(retry_on_error=retry_on_error, retry=Retry(NoBackoff(), retries))
assert c.retry_on_error == retry_on_error
assert isinstance(c.retry, Retry)
assert c.retry._retries == retries
assert set(c.retry._supported_errors) == set(retry_on_error)
class TestRetry:
"Test that Retry calls backoff and retries the expected number of times"
def setup_method(self, test_method):
self.actual_attempts = 0
self.actual_failures = 0
async def _do(self):
self.actual_attempts += 1
raise ConnectionError()
async def _fail(self, error):
self.actual_failures += 1
async def _fail_inf(self, error):
self.actual_failures += 1
if self.actual_failures == 5:
raise ConnectionError()
@pytest.mark.parametrize("retries", range(10))
@pytest.mark.asyncio
async def test_retry(self, retries: int):
backoff = BackoffMock()
retry = Retry(backoff, retries)
with pytest.raises(ConnectionError):
await retry.call_with_retry(self._do, self._fail)
assert self.actual_attempts == 1 + retries
assert self.actual_failures == 1 + retries
assert backoff.reset_calls == 1
assert backoff.calls == retries
@pytest.mark.asyncio
async def test_infinite_retry(self):
backoff = BackoffMock()
# specify infinite retries, but give up after 5
retry = Retry(backoff, -1)
with pytest.raises(ConnectionError):
await retry.call_with_retry(self._do, self._fail_inf)
assert self.actual_attempts == 5
assert self.actual_failures == 5
class TestRedisClientRetry:
"Test the Redis client behavior with retries"
async def test_get_set_retry_object(self, request):
retry = Retry(NoBackoff(), 2)
url = request.config.getoption("--redis-url")
r = await Redis.from_url(url, retry_on_timeout=True, retry=retry)
assert r.get_retry()._retries == retry._retries
assert isinstance(r.get_retry()._backoff, NoBackoff)
new_retry_policy = Retry(ExponentialBackoff(), 3)
exiting_conn = await r.connection_pool.get_connection("_")
r.set_retry(new_retry_policy)
assert r.get_retry()._retries == new_retry_policy._retries
assert isinstance(r.get_retry()._backoff, ExponentialBackoff)
assert exiting_conn.retry._retries == new_retry_policy._retries
new_conn = await r.connection_pool.get_connection("_")
assert new_conn.retry._retries == new_retry_policy._retries
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