CODEWITHSUNDEEP
pythonpython-loggingstructlog
aldo
aldo

Reputation: 183

Structlog and logging module not logging with pytest

So I have a testing folder structure (that tests a module src not shown here) like this:

├── tests
│   ├── __init__.py
│   ├── conftest.py
│   ├── test_main.py

And have the __init__.py configure my logging as shown:

import structlog, logging, sys
from structlog.testing import LogCapture

logging.basicConfig(filename="test.log", filemode="w")

structlog.configure(
    processors=[LogCapture()],
    context_class=structlog.threadlocal.wrap_dict(dict),
    logger_factory=structlog.stdlib.LoggerFactory(),
    cache_logger_on_first_use=True
)

And my test_main.py as shown:

import logging, structlog, pytest

from src.factories.factories import MyFactory
import src.main
from pathlib import Path
from datetime import datetime

@pytest.mark.parametrize(
    "factory",
    [
        MyFactory(),
    ],
)
def test_main(path_to_results_folder_fixture_in_conftest, factory):
    structlog.get_logger().info("test")
    no_of_files_function = lambda: sum(1 for _ in Path(path_to_results_folder_fixture_in_conftest).iterdir())
    len_before = no_of_files_function()
    src.main.main("sony", factory, path_to_results_folder)
    assert no_of_files_function() == len_before + 1

Then I simply run pytest test_main.py. I was expecting the line structlog.get_logger().info("test") to produce the line test in the test.log. However, there's only an empty test.log generated. What am I doing wrong? I have configured logging, but structlog seem to not see it. For more information, nothing is also outputted to stdout/console.

Upvotes: 0

Views: 1591

Answers (2)

Ryan Neldner
Ryan Neldner

Reputation: 1

By default, pytest captures all output and only displays it for failing tests. Setting capture=no or -s for short might solve your issue.

Try pytest -s test_main.py

or if using pytest.ini

[pytest]
addopts = -s

Upvotes: 0

hynek
hynek

Reputation: 4166

If you configure structlog to use LogCapture, it captures the log entries instead of printing them – that's the whole purpose of it. See also https://www.structlog.org/en/latest/testing.html

Upvotes: 3

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