sanic/tests/test_logging.py

import logging
import uuid

from importlib import reload
from io import StringIO
from unittest.mock import Mock

import pytest

import sanic

from sanic import Sanic
from sanic.log import LOGGING_CONFIG_DEFAULTS, logger
from sanic.response import text


logging_format = """module: %(module)s; \
function: %(funcName)s(); \
message: %(message)s"""


def reset_logging():
    logging.shutdown()
    reload(logging)


def test_log(app):
    log_stream = StringIO()
    for handler in logging.root.handlers[:]:
        logging.root.removeHandler(handler)
    logging.basicConfig(
        format=logging_format, level=logging.DEBUG, stream=log_stream
    )
    log = logging.getLogger()
    rand_string = str(uuid.uuid4())

    @app.route("/")
    def handler(request):
        log.info(rand_string)
        return text("hello")

    request, response = app.test_client.get("/")
    log_text = log_stream.getvalue()
    assert rand_string in log_text


def test_logging_defaults():
    # reset_logging()
    app = Sanic("test_logging")

    for fmt in [h.formatter for h in logging.getLogger("sanic.root").handlers]:
        assert (
            fmt._fmt
            == LOGGING_CONFIG_DEFAULTS["formatters"]["generic"]["format"]
        )

    for fmt in [
        h.formatter for h in logging.getLogger("sanic.error").handlers
    ]:
        assert (
            fmt._fmt
            == LOGGING_CONFIG_DEFAULTS["formatters"]["generic"]["format"]
        )

    for fmt in [
        h.formatter for h in logging.getLogger("sanic.access").handlers
    ]:
        assert (
            fmt._fmt
            == LOGGING_CONFIG_DEFAULTS["formatters"]["access"]["format"]
        )


def test_logging_pass_customer_logconfig():
    # reset_logging()

    modified_config = LOGGING_CONFIG_DEFAULTS
    modified_config["formatters"]["generic"][
        "format"
    ] = "%(asctime)s - (%(name)s)[%(levelname)s]: %(message)s"
    modified_config["formatters"]["access"][
        "format"
    ] = "%(asctime)s - (%(name)s)[%(levelname)s]: %(message)s"

    app = Sanic("test_logging", log_config=modified_config)

    for fmt in [h.formatter for h in logging.getLogger("sanic.root").handlers]:
        assert fmt._fmt == modified_config["formatters"]["generic"]["format"]

    for fmt in [
        h.formatter for h in logging.getLogger("sanic.error").handlers
    ]:
        assert fmt._fmt == modified_config["formatters"]["generic"]["format"]

    for fmt in [
        h.formatter for h in logging.getLogger("sanic.access").handlers
    ]:
        assert fmt._fmt == modified_config["formatters"]["access"]["format"]


@pytest.mark.parametrize("debug", (True, False))
def test_log_connection_lost(app, debug, monkeypatch):
    """ Should not log Connection lost exception on non debug """
    stream = StringIO()
    root = logging.getLogger("sanic.root")
    root.addHandler(logging.StreamHandler(stream))
    monkeypatch.setattr(sanic.server, "logger", root)

    @app.route("/conn_lost")
    async def conn_lost(request):
        response = text("Ok")
        response.output = Mock(side_effect=RuntimeError)
        return response

    with pytest.raises(ValueError):
        # catch ValueError: Exception during request
        app.test_client.get("/conn_lost", debug=debug)

    log = stream.getvalue()

    if debug:
        assert "Connection lost before response written @" in log
    else:
        assert "Connection lost before response written @" not in log


def test_logger(caplog):
    rand_string = str(uuid.uuid4())

    app = Sanic()

    @app.get("/")
    def log_info(request):
        logger.info(rand_string)
        return text("hello")

    with caplog.at_level(logging.INFO):
        request, response = app.test_client.get("/")

    assert caplog.record_tuples[0] == (
        "sanic.root",
        logging.INFO,
        "Goin' Fast @ http://127.0.0.1:42101",
    )
    assert caplog.record_tuples[1] == (
        "sanic.root",
        logging.INFO,
        "http://127.0.0.1:42101/",
    )
    assert caplog.record_tuples[2] == ("sanic.root", logging.INFO, rand_string)
    assert caplog.record_tuples[-1] == (
        "sanic.root",
        logging.INFO,
        "Server Stopped",
    )


def test_logging_modified_root_logger_config():
    # reset_logging()

    modified_config = LOGGING_CONFIG_DEFAULTS
    modified_config["loggers"]["sanic.root"]["level"] = "DEBUG"

    app = Sanic("test_logging", log_config=modified_config)

    assert logging.getLogger("sanic.root").getEffectiveLevel() == logging.DEBUG