zulip/zerver/tests/test_cache.py

87 lines
3.7 KiB
Python

from django.conf import settings
from mock import Mock, patch
from typing import List, Dict
from zerver.apps import flush_cache
from zerver.lib.cache import generic_bulk_cached_fetch, user_profile_by_email_cache_key
from zerver.lib.test_classes import ZulipTestCase
from zerver.models import get_system_bot, get_user_profile_by_email, UserProfile
class AppsTest(ZulipTestCase):
def test_cache_gets_flushed(self) -> None:
with patch('zerver.apps.logging.info') as mock_logging:
with patch('zerver.apps.cache.clear') as mock:
# The argument to flush_cache doesn't matter
flush_cache(Mock())
mock.assert_called_once()
mock_logging.assert_called_once()
class BotCacheKeyTest(ZulipTestCase):
def test_bot_profile_key_deleted_on_save(self) -> None:
# Get the profile cached on both cache keys:
user_profile = get_user_profile_by_email(settings.EMAIL_GATEWAY_BOT)
bot_profile = get_system_bot(settings.EMAIL_GATEWAY_BOT)
self.assertEqual(user_profile, bot_profile)
# Flip the setting and save:
flipped_setting = not bot_profile.is_api_super_user
bot_profile.is_api_super_user = flipped_setting
bot_profile.save()
# The .save() should have deleted cache keys, so if we fetch again,
# the returned objects should have is_api_super_user set correctly.
bot_profile2 = get_system_bot(settings.EMAIL_GATEWAY_BOT)
self.assertEqual(bot_profile2.is_api_super_user, flipped_setting)
user_profile2 = get_user_profile_by_email(settings.EMAIL_GATEWAY_BOT)
self.assertEqual(user_profile2.is_api_super_user, flipped_setting)
class GenericBulkCachedFetchTest(ZulipTestCase):
def test_query_function_called_only_if_needed(self) -> None:
# Get the user cached:
hamlet = get_user_profile_by_email(self.example_email("hamlet"))
class CustomException(Exception):
pass
def query_function(emails: List[str]) -> List[UserProfile]:
raise CustomException("The query function was called")
# query_function shouldn't be called, because the only requested object
# is already cached:
result = generic_bulk_cached_fetch(
cache_key_function=user_profile_by_email_cache_key,
query_function=query_function,
object_ids=[self.example_email("hamlet")]
) # type: Dict[str, UserProfile]
self.assertEqual(result, {hamlet.email: hamlet})
flush_cache(Mock())
# With the cache flushed, the query_function should get called:
with self.assertRaises(CustomException):
generic_bulk_cached_fetch(
cache_key_function=user_profile_by_email_cache_key,
query_function=query_function,
object_ids=[self.example_email("hamlet")]
)
def test_empty_object_ids_list(self) -> None:
class CustomException(Exception):
pass
def cache_key_function(email: str) -> str: # nocoverage -- this is just here to make sure it's not called
raise CustomException("The cache key function was called")
def query_function(emails: List[str]) -> List[UserProfile]: # nocoverage -- this is just here to make sure it's not called
raise CustomException("The query function was called")
# query_function and cache_key_function shouldn't be called, because
# objects_ids is empty, so there's nothing to do.
result = generic_bulk_cached_fetch(
cache_key_function=cache_key_function,
query_function=query_function,
object_ids=[]
) # type: Dict[str, UserProfile]
self.assertEqual(result, {})