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Provides Django specific testing helpers to Attest

Project description


.. figure::

An alternative testing framework for Django, based on Attest.

Attempts to provide a more Pythonic testing API than ``unittest``. Useful
testing features in recent version of Django have been included for use with
older version.



- Django ≥1.2.
- Attest >= 0.6 (use master)

Use pip::

pip install django-attest

On Django ≥1.3, a custom test runner can be used::

TEST_RUNNER = "django_attest.Runner"


Create some tests, then run them (replace ``tests.settings`` with your own)::

DJANGO_SETTINGS_MODULE=tests.settings attest -r django

Create a test collection and optionally include one of ``django-attest``'s test
contexts. The result is that a ``client`` argument is passed to each test
within the collection. ``client`` is a ``django.test.TestClient`` object and
allows you to make HTTP requests to your project.


from attest import Tests
from django_attest import TestContext

tests = Tests()

def can_add(client):
client.get('/some-url/') # same as self.client.get() if you were using
# django.test.TestCase

See the `TestCase.client documentation`__ for more details.

.. __:

When using a ``django.test.TestCase`` subclass, you're able to specify various
options that affect the environment in which your tests are executed.
``django-attest`` provides the same functionality via keyword arguments to the
``TestContext``. The following keyword arguments are supported:

- ``fixtures`` --
- ``urls`` --
- ``client_class`` --
- ``multi_db`` --

For example if you want to specify fixtures, urls, a client_class,
or multi_db, simply pass
in these options when creating the ``django_tables.TestContext`` object::

from attest import Tests
from django_attest import TestContext

tests = Tests()
tests.context(TestContext(fixtures=['testdata.json'], urls='myapp.urls'))

Transaction management in tests

If you need to test transaction management within your tests, use
``TransactionTestContext`` rather than ``TestContext``, e.g.::

from attest import Tests
from django_attest import TransactionTestContext

tests = Tests()

def some_test(client):
# test something

Testing a reusable Django app

A flexible approach is to create a ``tests`` Django project. This shouldn't be
the fully-fledged output of `` startproject``, but instead the
minimum required to keep Django happy.



from attest import Tests

suite = Tests()

def example():
assert len("abc") == 3

Django's built-in test runner performs various environment initialisation and
cleanup tasks. It's important that tests are run using one of the loaders from



'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': ':memory:',


SECRET_KEY = 'abcdefghiljklmnopqrstuvwxyz'

ROOT_URLCONF = 'tests.urls'



from django.conf.urls import patterns
urlpatterns = patterns('')

Testing non-reusable apps in a Django project

To test non-reusable apps in a Django project, the app must contain either a
``tests`` or ``models`` module with either a ``suite`` function that returns a
``unittest.TestCase``, or simply contains ``TestCase`` classes. (see `Django's
documentation <>`_
for details).

As of Attest 0.6 you should use test cases::

# myapp/
from attest import Tests

template = Tests()

def filter():
# ...

template = template.test_case()

This allows Django to find your tests, and allows you to run individual tests,

python test myapp.template.test_filter

.. note::

When a ``unittest.TestCase`` is created from a test collection, the
function names are prefixed with ``test_``.

Prior to Attest 0.6, you must use the test suite option, which unfortunately
doesn't support running individual tests::

from attest import Tests

template = Tests()

def filter():
# ...

suite = template.test_suite

assert hook

Since Django uses ```` as its entry point, django-attest enables the
assert hook automatically when it's first imported.

This means that you need to do the following:

1. Make sure ``django_attest`` is imported as soon as possible.
2. Add ``from attest import assert_hook`` to the top of each test module.

Django assertions

For details on each of these, see ``django_attest/``.


Assert that a response redirects to some resource::

from django_attest import redirects

response = client.get('/')
redirects(response, url="")
redirects(response, scheme="http")
redirects(response, domain="")
redirects(response, port="8000")
redirects(response, path="/foo/")
redirects(response, query="key=value")
redirects(response, fragment="frag")

Each component can only be asserted if it exists explicitly in the URL, e.g.

with attest.raises(AssertionError):
redirects(client.get('/'), port=80) # port is rarely explicit


Assert an expected set of queries took place::

from django_attest import queries

with queries() as qs:
assert len(qs) == 5

# The same could be rewritten as
with queries(count=5):

Context managers

django-attest has some context managers to simplify common tasks:


Change global settings within a block, same functionality as Django 1.4's

from django_attest import settings

with settings(MEDIA_ROOT="/tmp"):
# ...

Code that's sensitive to settings changes should use the
``django_attest.signals.setting_changed`` signal to overcome any assumptions of
settings remaining constant.

.. note::

On Django >=1.4, ``django_attest.signals.setting_changed`` is an alias of

translation(language_code, deactivate=False)

Activate a specific translation/language. The semantics are the same as Django
1.4's ``django.utils.translation.override``::

from django_attest import translation
from django.utils.translation import ugettext

with translation('de'):
assert ugettext('the apple') == 'der Apfel'


Takes a list of URL patterns and promotes them up as the root URLconf. This
avoids the need to have a dedicated *test project* and ```` for simple

def foo(client):
def view(request):
return HttpResponse('success')

urls = patterns('', (r'view/', view))
with urlconf(urls):
assert client.get(reverse(view)).content == 'success'

If you want to provide a dotted path to a ````, use
``settings(ROOT_URLCONF=...)`` instead, it takes care to clear URL resolver


- ``django_attest.RequestFactory`` (from Django 1.4)
- ``django_attest.settings`` (``override_settings`` inspired from Django 1.4)
- ``django_attest.translation`` (``django.utils.translation.override`` port from Django 1.4)



- Add ``translation`` context manager
- Add Travis CI testing


- Fix requirements for Attest


- Setting up the Django environment is no longer part of the distuils loader,
rather it's builtin to the django-attest reporters.
- Declare reporter entry points (named ``django-...``)


- Make test runner compatible with Python 2.6
- Add support for Python 3.2


- Add test runner to show proper Attest formatting of assertion errors

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