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Diffstat (limited to 'tests/config/test_cache.py')
| -rw-r--r-- | tests/config/test_cache.py | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/tests/config/test_cache.py b/tests/config/test_cache.py new file mode 100644 index 0000000000..d3ec24c975 --- /dev/null +++ b/tests/config/test_cache.py @@ -0,0 +1,171 @@ +# -*- coding: utf-8 -*- +# Copyright 2020 Matrix.org Foundation C.I.C. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +from synapse.config._base import Config, RootConfig +from synapse.config.cache import CacheConfig, add_resizable_cache +from synapse.util.caches.lrucache import LruCache + +from tests.unittest import TestCase + + +class FakeServer(Config): + section = "server" + + +class TestConfig(RootConfig): + config_classes = [FakeServer, CacheConfig] + + +class CacheConfigTests(TestCase): + def setUp(self): + # Reset caches before each test + TestConfig().caches.reset() + + def test_individual_caches_from_environ(self): + """ + Individual cache factors will be loaded from the environment. + """ + config = {} + t = TestConfig() + t.caches._environ = { + "SYNAPSE_CACHE_FACTOR_SOMETHING_OR_OTHER": "2", + "SYNAPSE_NOT_CACHE": "BLAH", + } + t.read_config(config, config_dir_path="", data_dir_path="") + + self.assertEqual(dict(t.caches.cache_factors), {"something_or_other": 2.0}) + + def test_config_overrides_environ(self): + """ + Individual cache factors defined in the environment will take precedence + over those in the config. + """ + config = {"caches": {"per_cache_factors": {"foo": 2, "bar": 3}}} + t = TestConfig() + t.caches._environ = { + "SYNAPSE_CACHE_FACTOR_SOMETHING_OR_OTHER": "2", + "SYNAPSE_CACHE_FACTOR_FOO": 1, + } + t.read_config(config, config_dir_path="", data_dir_path="") + + self.assertEqual( + dict(t.caches.cache_factors), + {"foo": 1.0, "bar": 3.0, "something_or_other": 2.0}, + ) + + def test_individual_instantiated_before_config_load(self): + """ + If a cache is instantiated before the config is read, it will be given + the default cache size in the interim, and then resized once the config + is loaded. + """ + cache = LruCache(100) + + add_resizable_cache("foo", cache_resize_callback=cache.set_cache_factor) + self.assertEqual(cache.max_size, 50) + + config = {"caches": {"per_cache_factors": {"foo": 3}}} + t = TestConfig() + t.read_config(config, config_dir_path="", data_dir_path="") + + self.assertEqual(cache.max_size, 300) + + def test_individual_instantiated_after_config_load(self): + """ + If a cache is instantiated after the config is read, it will be + immediately resized to the correct size given the per_cache_factor if + there is one. + """ + config = {"caches": {"per_cache_factors": {"foo": 2}}} + t = TestConfig() + t.read_config(config, config_dir_path="", data_dir_path="") + + cache = LruCache(100) + add_resizable_cache("foo", cache_resize_callback=cache.set_cache_factor) + self.assertEqual(cache.max_size, 200) + + def test_global_instantiated_before_config_load(self): + """ + If a cache is instantiated before the config is read, it will be given + the default cache size in the interim, and then resized to the new + default cache size once the config is loaded. + """ + cache = LruCache(100) + add_resizable_cache("foo", cache_resize_callback=cache.set_cache_factor) + self.assertEqual(cache.max_size, 50) + + config = {"caches": {"global_factor": 4}} + t = TestConfig() + t.read_config(config, config_dir_path="", data_dir_path="") + + self.assertEqual(cache.max_size, 400) + + def test_global_instantiated_after_config_load(self): + """ + If a cache is instantiated after the config is read, it will be + immediately resized to the correct size given the global factor if there + is no per-cache factor. + """ + config = {"caches": {"global_factor": 1.5}} + t = TestConfig() + t.read_config(config, config_dir_path="", data_dir_path="") + + cache = LruCache(100) + add_resizable_cache("foo", cache_resize_callback=cache.set_cache_factor) + self.assertEqual(cache.max_size, 150) + + def test_cache_with_asterisk_in_name(self): + """Some caches have asterisks in their name, test that they are set correctly. + """ + + config = { + "caches": { + "per_cache_factors": {"*cache_a*": 5, "cache_b": 6, "cache_c": 2} + } + } + t = TestConfig() + t.caches._environ = { + "SYNAPSE_CACHE_FACTOR_CACHE_A": "2", + "SYNAPSE_CACHE_FACTOR_CACHE_B": 3, + } + t.read_config(config, config_dir_path="", data_dir_path="") + + cache_a = LruCache(100) + add_resizable_cache("*cache_a*", cache_resize_callback=cache_a.set_cache_factor) + self.assertEqual(cache_a.max_size, 200) + + cache_b = LruCache(100) + add_resizable_cache("*Cache_b*", cache_resize_callback=cache_b.set_cache_factor) + self.assertEqual(cache_b.max_size, 300) + + cache_c = LruCache(100) + add_resizable_cache("*cache_c*", cache_resize_callback=cache_c.set_cache_factor) + self.assertEqual(cache_c.max_size, 200) + + def test_apply_cache_factor_from_config(self): + """Caches can disable applying cache factor updates, mainly used by + event cache size. + """ + + config = {"caches": {"event_cache_size": "10k"}} + t = TestConfig() + t.read_config(config, config_dir_path="", data_dir_path="") + + cache = LruCache( + max_size=t.caches.event_cache_size, apply_cache_factor_from_config=False, + ) + add_resizable_cache("event_cache", cache_resize_callback=cache.set_cache_factor) + + self.assertEqual(cache.max_size, 10240) |