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from time import sleep
from unittest.mock import patch
import pytest
from ellar.cache.backends.pylib_cache import PyLibMCCacheBackend
from ellar.cache.backends.pymem_cache import PyMemcacheCacheBackend
from ellar.cache.model import CacheKeyWarning
from .pylib_mock import MockClient, MockSetFailureClient
class PyLibMCCacheBackendMock(PyLibMCCacheBackend):
MEMCACHE_CLIENT = MockClient
@pytest.mark.asyncio
async def test_simple_cache_backend() -> None:
backend = PyLibMCCacheBackendMock(
servers=["127.0.0.1:11211"],
options={"binary": True, "behaviors": {"tcp_nodelay": True, "ketama": True}},
)
assert backend._cache_client.kwargs == {
"binary": True,
"behaviors": {"tcp_nodelay": True, "ketama": True},
}
await backend.set_async("test", "Wanaka", 1)
value = await backend.get_async("test")
assert value == "Wanaka"
sleep(1.1)
value = await backend.get_async("test")
assert not value
class TestPyLibMCCacheBackend:
def setup_method(self):
self.backend = PyLibMCCacheBackendMock(servers=["127.0.0.1:11211"])
def test_set(self):
assert self.backend.set("test", "1", 1)
value = self.backend.get("test")
assert value == "1"
def test_has_key(self):
assert not self.backend.has_key("test-has-key")
assert self.backend.set("test-has-key", "1", 1)
assert self.backend.has_key("test-has-key")
def test_delete(self):
assert not self.backend.delete("test-delete")
assert self.backend.set("test-delete", "1", 1)
assert self.backend.delete("test-delete")
def test_touch(self):
assert not self.backend.touch("test-touch")
assert self.backend.set("test-touch", "1", 0.1)
assert self.backend.touch("test-touch", 30)
sleep(0.22)
assert self.backend.get("test-touch") == "1"
assert self.backend.close() is None
def test_incr(self):
self.backend.set("test-incr-sync", 0, version="1", ttl=1)
self.backend.incr("test-incr-sync", version="1")
assert self.backend.get("test-incr-sync", version="1") == 1
self.backend.incr("test-incr-sync", 2, version="1")
self.backend.incr("test-incr-sync", 3, version="1")
assert self.backend.get("test-incr-sync") == 6
def test_decr(self):
self.backend.set("test-decr-sync", 2, version="1", ttl=1)
self.backend.decr("test-decr-sync", version="1")
assert self.backend.get("test-decr-sync", version="1") == 1
self.backend.decr("test-decr-sync", 2, version="1")
self.backend.decr("test-decr-sync", 3, version="1")
assert self.backend.get("test-decr-sync") == 0
def test_clear(self):
assert self.backend.set("test-touch", "1", 0.1)
self.backend.clear()
assert self.backend.get("test-touch") is None
def test_failed_cache_set_deletes_existing_data(self):
class DemoPyLibMemCacheBackend(PyLibMCCacheBackend):
MEMCACHE_CLIENT = MockSetFailureClient
self.backend = DemoPyLibMemCacheBackend(servers=["127.0.0.1:11211"])
assert self.backend.set("test-set-failed", "1", 5) is False
assert self.backend.get("test-set-failed") is None
def test_invalid_key_length(self):
# memcached limits key length to 250.
key = ("a" * 250) + "清"
expected_warning = (
"Cache key will cause errors if used with memcached: "
"%r (longer than %s)" % (key, self.backend.MEMCACHE_MAX_KEY_LENGTH)
)
with pytest.warns(CacheKeyWarning) as wa:
self.backend.set(key, "value")
assert str(wa.list[0].message) == str(CacheKeyWarning(expected_warning))
def test_invalid_key_characters(self):
# memcached doesn't allow whitespace or control characters in keys.
key = "key with spaces and 清"
expected_warning = (
"Cache key contains characters that will cause errors if used with memcached: %r"
% (key,)
)
with pytest.warns(CacheKeyWarning) as wa:
self.backend.set(key, "value")
assert str(wa.list[0].message) == str(CacheKeyWarning(expected_warning))
class TestPyLibMCCacheBackendAsync:
def setup_method(self):
self.backend = PyLibMCCacheBackendMock(servers=["127.0.0.1:11211"])
async def test_set_async(self, anyio_backend):
assert await self.backend.set_async("test", "1", 1)
value = await self.backend.get_async("test")
assert value == "1"
async def test_has_key_async(self, anyio_backend):
assert not await self.backend.has_key_async("test-has-key")
assert await self.backend.set_async("test-has-key", "1", 1)
assert await self.backend.has_key_async("test-has-key")
async def test_delete_async(self, anyio_backend):
assert not await self.backend.delete_async("test-delete")
assert await self.backend.set_async("test-delete", "1", 1)
assert await self.backend.delete_async("test-delete")
async def test_touch_async(self, anyio_backend):
assert not await self.backend.touch_async("test-touch")
assert await self.backend.set_async("test-touch", "1", 1)
assert await self.backend.touch_async("test-touch", 30)
sleep(0.22)
assert await self.backend.get_async("test-touch") == "1"
assert await self.backend.close_async() is None
async def test_clear(self, anyio_backend):
assert self.backend.set_async("test-touch", "1", 0.1)
await self.backend.clear_async()
assert await self.backend.get_async("test-touch") is None
async def test_incr_async(self, anyio_backend):
await self.backend.set_async(
f"test-incr-async-{anyio_backend}", 0, version="1", ttl=1
)
await self.backend.incr_async(f"test-incr-async-{anyio_backend}", version="1")
assert (
await self.backend.get_async(
f"test-incr-async-{anyio_backend}", version="1"
)
== 1
)
await self.backend.incr_async(
f"test-incr-async-{anyio_backend}", 2, version="1"
)
await self.backend.incr_async(
f"test-incr-async-{anyio_backend}", 3, version="1"
)
assert await self.backend.get_async(f"test-incr-async-{anyio_backend}") == 6
async def test_decr_async(self, anyio_backend):
await self.backend.set_async("test-decr-async-pylib", 2, version="1", ttl=1)
await self.backend.decr_async("test-decr-async-pylib", version="1")
assert await self.backend.get_async("test-decr-async-pylib", version="1") == 1
await self.backend.decr_async("test-decr-async-pylib", 2, version="1")
await self.backend.decr_async("test-decr-async-pylib", 3, version="1")
assert await self.backend.get_async("test-decr-async-pylib") == 0
class TestPyMemCacheBackend:
def test_init_pymemcache_backend(self):
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
backend._options.pop("serde")
assert backend._options == {
"allow_unicode_keys": True,
"default_noreply": False,
}
assert backend.close() is None
def test_different_connection_setup(self):
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211", "172.10.169.53"])
assert len(backend._cache_client.clients) == 2
assert ["127.0.0.1:11211", "172.10.169.53:11211"] == list(
backend._cache_client.clients.keys()
)
@patch("pymemcache.HashClient.flush_all")
async def test_clear_async(self, mock_flush_all, anyio_backend):
assert mock_flush_all.called is False
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
await backend.clear_async()
assert mock_flush_all.called is True
@patch("pymemcache.Client.close")
async def test_close_async(self, mock_disconnect_all, anyio_backend):
assert mock_disconnect_all.called is False
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
await backend.close_async()
assert mock_disconnect_all.called is True
@patch("pymemcache.HashClient.flush_all")
def test_clear(self, mock_flush_all):
assert mock_flush_all.called is False
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
backend.clear()
assert mock_flush_all.called is True
@patch("pymemcache.Client.close")
def test_close(self, mock_disconnect_all):
assert mock_disconnect_all.called is False
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
backend.close()
assert mock_disconnect_all.called is True
@patch("pymemcache.HashClient.set")
def test_invalid_key_length(self, mock_set):
# memcached limits key length to 250.
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
key = ("a" * 250) + "清"
expected_warning = (
"Cache key will cause errors if used with memcached: "
"%r (longer than %s)" % (key, backend.MEMCACHE_MAX_KEY_LENGTH)
)
with pytest.warns(CacheKeyWarning) as wa:
backend.set(key, "value")
assert str(wa.list[0].message) == str(CacheKeyWarning(expected_warning))
@patch("pymemcache.HashClient.set")
def test_invalid_key_characters(self, mock_set):
backend = PyMemcacheCacheBackend(servers=["127.0.0.1:11211"])
# memcached doesn't allow whitespace or control characters in keys.
key = "key with spaces and 清"
expected_warning = (
"Cache key contains characters that will cause errors if used with memcached: %r"
% (key,)
)
with pytest.warns(CacheKeyWarning) as wa:
backend.set(key, "value")
assert str(wa.list[0].message) == str(CacheKeyWarning(expected_warning))