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"""
Useful testing utilities.
This module is considered public API.
"""
import time
import socket
from pymemcache.exceptions import MemcacheClientError, MemcacheIllegalInputError
from pymemcache.serde import LegacyWrappingSerde
from pymemcache.client.base import check_key_helper
class MockMemcacheClient:
"""
A (partial) in-memory mock for Clients.
"""
def __init__(
self,
server=None,
serde=None,
serializer=None,
deserializer=None,
connect_timeout=None,
timeout=None,
no_delay=False,
ignore_exc=False,
socket_module=None,
default_noreply=True,
allow_unicode_keys=False,
encoding="ascii",
tls_context=None,
):
self._contents = {}
self.serde = serde or LegacyWrappingSerde(serializer, deserializer)
self.allow_unicode_keys = allow_unicode_keys
# Unused, but present for interface compatibility
self.server = server
self.connect_timeout = connect_timeout
self.timeout = timeout
self.no_delay = no_delay
self.ignore_exc = ignore_exc
self.socket_module = socket
self.sock = None
self.encoding = encoding
self.tls_context = tls_context
def check_key(self, key):
"""Checks key and add key_prefix."""
return check_key_helper(key, allow_unicode_keys=self.allow_unicode_keys)
def clear(self):
"""Method used to clear/reset mock cache"""
self._contents.clear()
def get(self, key, default=None):
key = self.check_key(key)
if key not in self._contents:
return default
expire, value, flags = self._contents[key]
if expire and expire < time.time():
del self._contents[key]
return default
return self.serde.deserialize(key, value, flags)
def get_many(self, keys):
out = {}
for key in keys:
value = self.get(key)
if value is not None:
out[key] = value
return out
get_multi = get_many
def set(self, key, value, expire=0, noreply=True, flags=None):
key = self.check_key(key)
if isinstance(value, str) and not isinstance(value, bytes):
try:
value = value.encode(self.encoding)
except (UnicodeEncodeError, UnicodeDecodeError):
raise MemcacheIllegalInputError
value, flags = self.serde.serialize(key, value)
if expire:
expire += time.time()
self._contents[key] = expire, value, flags
return True
def set_many(self, values, expire=0, noreply=True, flags=None):
result = []
for key, value in values.items():
ret = self.set(key, value, expire, noreply, flags=flags)
if not ret:
result.append(key)
return [] if noreply else result
set_multi = set_many
def incr(self, key, value, noreply=False):
current = self.get(key)
present = current is not None
if present:
self.set(key, current + value, noreply=noreply)
return None if noreply or not present else current + value
def decr(self, key, value, noreply=False):
current = self.get(key)
present = current is not None
if present:
self.set(key, current - value, noreply=noreply)
return None if noreply or not present else current - value
def add(self, key, value, expire=0, noreply=True, flags=None):
current = self.get(key)
present = current is not None
if not present:
self.set(key, value, expire, noreply, flags=flags)
return noreply or not present
def delete(self, key, noreply=True):
key = self.check_key(key)
current = self._contents.pop(key, None)
present = current is not None
return noreply or present
def delete_many(self, keys, noreply=True):
for key in keys:
self.delete(key, noreply)
return True
def prepend(self, key, value, expire=0, noreply=True, flags=None):
current = self.get(key)
if current is not None:
if isinstance(value, str) and not isinstance(value, bytes):
try:
value = value.encode(self.encoding)
except (UnicodeEncodeError, UnicodeDecodeError):
raise MemcacheIllegalInputError
self.set(key, value + current, expire, noreply, flags=flags)
return True
def append(self, key, value, expire=0, noreply=True, flags=None):
current = self.get(key)
if current is not None:
if isinstance(value, str) and not isinstance(value, bytes):
try:
value = value.encode(self.encoding)
except (UnicodeEncodeError, UnicodeDecodeError):
raise MemcacheIllegalInputError
self.set(key, current + value, expire, noreply, flags=flags)
return True
delete_multi = delete_many
def stats(self, *_args):
# I make no claim that these values make any sense, but the format
# of the output is the same as for pymemcache.client.Client.stats()
return {
"version": "MockMemcacheClient",
"rusage_user": 1.0,
"rusage_system": 1.0,
"hash_is_expanding": False,
"slab_reassign_running": False,
"inter": "in-memory",
"evictions": False,
"growth_factor": 1.0,
"stat_key_prefix": "",
"umask": 0o644,
"detail_enabled": False,
"cas_enabled": False,
"auth_enabled_sasl": False,
"maxconns_fast": False,
"slab_reassign": False,
"slab_automove": False,
}
def replace(self, key, value, expire=0, noreply=True, flags=None):
current = self.get(key)
present = current is not None
if present:
self.set(key, value, expire, noreply, flags=flags)
return noreply or present
def cas(self, key, value, cas, expire=0, noreply=False, flags=None):
raise MemcacheClientError("CAS is not enabled for this instance")
def touch(self, key, expire=0, noreply=True):
current = self.get(key)
present = current is not None
if present:
self.set(key, current, expire, noreply=noreply)
return True if noreply or present else False
def cache_memlimit(self, memlimit):
return True
def version(self):
return "MockMemcacheClient"
def flush_all(self, delay=0, noreply=True):
self.clear()
return noreply or self._contents == {}
def quit(self):
pass
def close(self):
pass
|
