I have an existing Django (1.4) project, with multiple apps and extensive
business logic, that I need to write tests for. Based on a day or two of
reading of the core Django docs and numerous blogs (each of which go about
things subtly differently!?), I have made a start. As part of the seeming
"best practice" setup, I have also installed django-nose and coverage.
Currently, I have problems with my first test not working and also with
coverage seemingly not finding my test.
I have a separate `tests` directory in my project, with sub-directories;
each corresponding to an app. Each sub-directory then has a models, views,
and functions Python files; acting as placeholders for the test code I
think need to write. In the root of the `tests` directory, I have an
__init__.py file that has a number of lines that look like `from
myproj.app1.functions import *`.
I have changed the settings.py file to look like this (so that the tests
use a "fast" sqlite database):
if 'test' in sys.argv:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': 'test_db'
}
}
else:
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
# etc ... normal setup
The first test, in the first functions.py file, looks like this:
from django.test import TestCase
from django.core import management
from app1.models import default_Property # function to be tested
def setup():
management.call_command('loaddata', 'app1/fixtures/initial_data.json',
verbosity=1)
def teardown():
management.call_command('flush', verbosity=1, interactive=False)
class FunctionsTestCase(TestCase):
def _fixture_setup(self):
pass
def test_default_Property(self):
self.assertEqual(default_Property(), None)
The default_Property() function in app1 is just set to `return None` for
now, so that the above test should work.
However, the test fails. I get this strange error:
======================================================================
ERROR: test_default_Property (myproj.app1.tests.FunctionsTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py",
line 508, in __call__
self._post_teardown()
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py",
line 522, in _post_teardown
self._fixture_teardown()
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py",
line 847, in _fixture_teardown
transaction.leave_transaction_management(using=db)
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py",
line 52, in leave_transaction_management
connection.leave_transaction_management()
File
"/usr/local/lib/python2.7/dist-packages/django/db/backends/__init__.py",
line 115, in leave_transaction_management
raise TransactionManagementError("This code isn't under transaction "
TransactionManagementError: This code isn't under transaction management
----------------------------------------------------------------------
I could not find an obvious solution to this, as I do not even have
TransactionMiddleware enabled in my settings.
The other issue relates to coverage - it does not seem to recognise I have
written this test and still flags it as `red` ... Currently I am using
`coverage html' - but how I get it work properly?
Any help getting started overcoming these issues will be helpful, so I can
get on with the actual business of writing tests. (As a side-note, if
there is a good existing code base, for a Django-based project, that has
test code I could look at, I'd appreciate a link to it.)
Thanks
Derek
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