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Fixture configuration utils for py.test

Project description

Py.test Fixture Configuration
=============================

Simple configuration objects for Py.test fixtures. Allows you to skip
tests when their required config variables aren't set.

Installation
------------

Install using your favourite package manager:

.. code:: bash

pip install pytest-fixture-config
# or..
easy_install pytest-fixture-config

Enable the fixture explicitly in your tests or conftest.py (not required
when using setuptools entry points):

.. code:: python

pytest_plugins = ['pytest_fixture_config']

Specifying Configuration
------------------------

To specify your variables you create a class somewhere in your plugin
module, and a singleton instance of the class which reads the variables
from wherever you want. In this example we read them from the shell
environment:

.. code:: python

import os
from pytest_fixture_config import Config

class FixtureConfig(Config):
__slots__ = ('log_dir', 'log_watcher')

CONFIG=FixtureConfig(
log_dir=os.getenv('LOG_DIR', '/var/log'), # This has a default
log_watcher=os.getenv('LOG_WATCHER'), # This does not
)

Using Configuration
-------------------

Simply reference the singleton at run-time in your fixtures:

.. code:: python

import pytest

@pytest.fixture
def log_watcher():
return subprocess.popen([CONFIG.log_watcher, '--log-dir', CONFIG.log_dir])

def test_log_watcher(watcher):
watcher.communicate()

Skipping tests when things are missing
--------------------------------------

There are some decorators that allow you to skip tests when settings
aren't set. This is useful when you're testing something you might not
have installed but don't want your tests suite to fail::

.. code:: python

from pytest_fixture_config import requires_config

@requires_config(CONFIG, ['log_watcher', 'log_dir'])
@pytest.fixture
def log_watcher():
return subprocess.popen([CONFIG.log_watcher, '--log-dir', CONFIG.log_dir])

There is also a version for yield\_fixtures::

.. code:: python

from pytest_fixture_config import yield_requires_config

@yield_requires_config(CONFIG, ['log_watcher', 'log_dir'])
@pytest.fixture
def log_watcher():
watcher = subprocess.popen([CONFIG.log_watcher, '--log-dir', CONFIG.log_dir])
yield watcher
watcher.kill()

Changelog
---------

1.0 (2015-12-21)
~~~~~~~~~~~~~~~~

- Initial public release

Project details


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