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Diffstat (limited to 'tests/logging/test_terse_json.py')
| -rw-r--r-- | tests/logging/test_terse_json.py | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/tests/logging/test_terse_json.py b/tests/logging/test_terse_json.py new file mode 100644 index 0000000000..514282591d --- /dev/null +++ b/tests/logging/test_terse_json.py @@ -0,0 +1,234 @@ +# -*- coding: utf-8 -*- +# Copyright 2019 The 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. + +import json +from collections import Counter + +from twisted.logger import Logger + +from synapse.logging._structured import setup_structured_logging + +from tests.server import connect_client +from tests.unittest import HomeserverTestCase + +from .test_structured import FakeBeginner + + +class TerseJSONTCPTestCase(HomeserverTestCase): + def test_log_output(self): + """ + The Terse JSON outputter delivers simplified structured logs over TCP. + """ + log_config = { + "drains": { + "tersejson": { + "type": "network_json_terse", + "host": "127.0.0.1", + "port": 8000, + } + } + } + + # Begin the logger with our config + beginner = FakeBeginner() + setup_structured_logging( + self.hs, self.hs.config, log_config, logBeginner=beginner + ) + + logger = Logger( + namespace="tests.logging.test_terse_json", observer=beginner.observers[0] + ) + logger.info("Hello there, {name}!", name="wally") + + # Trigger the connection + self.pump() + + _, server = connect_client(self.reactor, 0) + + # Trigger data being sent + self.pump() + + # One log message, with a single trailing newline + logs = server.data.decode("utf8").splitlines() + self.assertEqual(len(logs), 1) + self.assertEqual(server.data.count(b"\n"), 1) + + log = json.loads(logs[0]) + + # The terse logger should give us these keys. + expected_log_keys = [ + "log", + "time", + "level", + "log_namespace", + "request", + "scope", + "server_name", + "name", + ] + self.assertEqual(set(log.keys()), set(expected_log_keys)) + + # It contains the data we expect. + self.assertEqual(log["name"], "wally") + + def test_log_backpressure_debug(self): + """ + When backpressure is hit, DEBUG logs will be shed. + """ + log_config = { + "loggers": {"synapse": {"level": "DEBUG"}}, + "drains": { + "tersejson": { + "type": "network_json_terse", + "host": "127.0.0.1", + "port": 8000, + "maximum_buffer": 10, + } + }, + } + + # Begin the logger with our config + beginner = FakeBeginner() + setup_structured_logging( + self.hs, + self.hs.config, + log_config, + logBeginner=beginner, + redirect_stdlib_logging=False, + ) + + logger = Logger( + namespace="synapse.logging.test_terse_json", observer=beginner.observers[0] + ) + + # Send some debug messages + for i in range(0, 3): + logger.debug("debug %s" % (i,)) + + # Send a bunch of useful messages + for i in range(0, 7): + logger.info("test message %s" % (i,)) + + # The last debug message pushes it past the maximum buffer + logger.debug("too much debug") + + # Allow the reconnection + _, server = connect_client(self.reactor, 0) + self.pump() + + # Only the 7 infos made it through, the debugs were elided + logs = server.data.splitlines() + self.assertEqual(len(logs), 7) + + def test_log_backpressure_info(self): + """ + When backpressure is hit, DEBUG and INFO logs will be shed. + """ + log_config = { + "loggers": {"synapse": {"level": "DEBUG"}}, + "drains": { + "tersejson": { + "type": "network_json_terse", + "host": "127.0.0.1", + "port": 8000, + "maximum_buffer": 10, + } + }, + } + + # Begin the logger with our config + beginner = FakeBeginner() + setup_structured_logging( + self.hs, + self.hs.config, + log_config, + logBeginner=beginner, + redirect_stdlib_logging=False, + ) + + logger = Logger( + namespace="synapse.logging.test_terse_json", observer=beginner.observers[0] + ) + + # Send some debug messages + for i in range(0, 3): + logger.debug("debug %s" % (i,)) + + # Send a bunch of useful messages + for i in range(0, 10): + logger.warn("test warn %s" % (i,)) + + # Send a bunch of info messages + for i in range(0, 3): + logger.info("test message %s" % (i,)) + + # The last debug message pushes it past the maximum buffer + logger.debug("too much debug") + + # Allow the reconnection + client, server = connect_client(self.reactor, 0) + self.pump() + + # The 10 warnings made it through, the debugs and infos were elided + logs = list(map(json.loads, server.data.decode("utf8").splitlines())) + self.assertEqual(len(logs), 10) + + self.assertEqual(Counter([x["level"] for x in logs]), {"WARN": 10}) + + def test_log_backpressure_cut_middle(self): + """ + When backpressure is hit, and no more DEBUG and INFOs cannot be culled, + it will cut the middle messages out. + """ + log_config = { + "loggers": {"synapse": {"level": "DEBUG"}}, + "drains": { + "tersejson": { + "type": "network_json_terse", + "host": "127.0.0.1", + "port": 8000, + "maximum_buffer": 10, + } + }, + } + + # Begin the logger with our config + beginner = FakeBeginner() + setup_structured_logging( + self.hs, + self.hs.config, + log_config, + logBeginner=beginner, + redirect_stdlib_logging=False, + ) + + logger = Logger( + namespace="synapse.logging.test_terse_json", observer=beginner.observers[0] + ) + + # Send a bunch of useful messages + for i in range(0, 20): + logger.warn("test warn", num=i) + + # Allow the reconnection + client, server = connect_client(self.reactor, 0) + self.pump() + + # The first five and last five warnings made it through, the debugs and + # infos were elided + logs = list(map(json.loads, server.data.decode("utf8").splitlines())) + self.assertEqual(len(logs), 10) + self.assertEqual(Counter([x["level"] for x in logs]), {"WARN": 10}) + self.assertEqual([0, 1, 2, 3, 4, 15, 16, 17, 18, 19], [x["num"] for x in logs]) |