How can I disable logging while running unit tests in Python Django?

Question

I am using a simple unit test based test runner to test my Django application.

My application itself is configured to use a basic logger in settings.py using:

<

Answer 1

logging.disable(logging.CRITICAL)

will disable all logging calls with levels less severe than or equal to CRITICAL. Logging can be re-enabled with

logging.disable(logging.NOTSET)

Answer 2

In my case I have a settings file settings/test.py created specifically for testing purposes, here's what it looks like:

from .base import *

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': 'test_db'
    }
}

PASSWORD_HASHERS = (
    'django.contrib.auth.hashers.MD5PasswordHasher',
)

LOGGING = {}

I put an environment variable DJANGO_SETTINGS_MODULE=settings.test to /etc/environment.

Answer 3

If you have different initaliser modules for test, dev and production then you can disable anything or redirect it in the initialser. I have local.py, test.py and production.py that all inherit from common.y

common.py does all the main config including this snippet :

LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'formatters': {
    'django.server': {
        '()': 'django.utils.log.ServerFormatter',
        'format': '[%(server_time)s] %(message)s',
    },
    'verbose': {
        'format': '%(levelname)s %(asctime)s %(module)s %(process)d %(thread)d %(message)s'
    },
    'simple': {
        'format': '%(levelname)s %(message)s'
    },
},
'filters': {
    'require_debug_true': {
        '()': 'django.utils.log.RequireDebugTrue',
    },
},
'handlers': {
    'django.server': {
        'level': 'INFO',
        'class': 'logging.StreamHandler',
        'formatter': 'django.server',
    },
    'console': {
        'level': 'DEBUG',
        'class': 'logging.StreamHandler',
        'formatter': 'simple'
    },
    'mail_admins': {
        'level': 'ERROR',
        'class': 'django.utils.log.AdminEmailHandler'
    }
},
'loggers': {
    'django': {
        'handlers': ['console'],
        'level': 'INFO',
        'propagate': True,
    },
    'celery.tasks': {
        'handlers': ['console'],
        'level': 'DEBUG',
        'propagate': True,
    },
    'django.server': {
        'handlers': ['django.server'],
        'level': 'INFO',
        'propagate': False,
    },
}

Then in test.py I have this:

console_logger = Common.LOGGING.get('handlers').get('console')
console_logger['class'] = 'logging.FileHandler
console_logger['filename'] = './unitest.log

This replaces the console handler with a FileHandler and means still get logging but I do not have to touch the production code base.