Django test runner not finding tests
PythonDjangoUnit TestingPython Problem Overview
I am new to both Python and Django and I'm learning by creating a diet management site but I've been completely defeated by getting my unit tests to run. All the docs and blogs I've found say that as long as it's discoverable from tests.py, tests.py is in the same folder as models.py and your test class subclasses TestCase, it should all get picked up automatically. This isn't working for me, when I run manage.py test <myapp> it doesn't find any tests.
I started with all my tests in their own package but have simplified it down to all tests just being in my tests.py file. The current tests.py looks like:
import unittest
from pyDietTracker.models import Weight
from pyDietTracker.weight.DisplayDataAdapters import DisplayWeight
class TestDisplayWeight(unittest.TestCase):
def setUp(self):
pass
def tearDown(self):
pass
def testGetWeightInStone_KG_Correctly_Converted(self):
weight = Weight()
weight.weight = 99.8
testAdapter = DisplayWeight(weight)
self.assertEquals(testAdapter.GetWeightInStone(), '15 st 10 lb')
I have tried it by subclassing the Django TestCase class as well but this didn't work either. I'm using Django 1.1.1, Python 2.6 and I'm running Snow Leopard.
I'm sure I am missing something very basic and obvious but I just can't work out what. Any ideas?
Edit: Just a quick update after a comment
INSTALLED_APPS = (
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.admin',
'pyDietTracker',
)
To get the tests to run I am running manage.py test pyDietTracker
Python Solutions
Solution 1 - Python
I had the same issue but my root cause was different.
I was getting Ran 0 tests, as OP.
But it turns out the test methods inside your test class must start with keyword test to run.
Example:
from django.test import TestCase
class FooTest(TestCase):
def setUp(self):
pass
def tearDown(self):
pass
def this_wont_run(self):
print 'Fail'
def test_this_will(self):
print 'Win'
Also the files with your TestCases in them have to start with test.
Solution 2 - Python
If you're using a yourapp/tests package/style for unittests, make sure there's a __init__.py in your tests folder (since that's what makes it a Python module!).
Solution 3 - Python
I can run test for specific apps e.g.
python project/manage.py test app_name
but when I run
python project/manage.py test
0 tests was found
Figure out I need to run this in the same directory as manage.py
so the solution would be, cd to project directory and run
python manage.py test
Solution 4 - Python
In my case, the app folder itself was missing an __init__.py. This results in the behaviour that the test will be run with python manage.py test project.app_name but not with python manage.py test.
project/
app_name/
__init__.py # this was missing
Solution 5 - Python
This may also happen when you are using a tests module instead of a tests.py. In this case you need to import all the test classes into the __init__.py of your tests module, e.g.
tests/
__init__.py
somemodule.py
In your __init__.py you now need to import the somemodule like this:
from .somemodule import *
Solution 6 - Python
This also happens if you have a syntax error in your tests.py.
Solution 7 - Python
In my case, I typed def instead of class. Instead of
class TestDisplayWeight(TestCase): # correct!
I had
def TestDisplayWeight(TestCase): # wrong!
Solution 8 - Python
Worked it out.
It turns out I had done django-admin.py startproject pyDietTracker but not python manage.py startapp myApp. After going back and doing this, it did work as documented. It would appear I have a lot to learn about reading and the difference between a site and an app in Django.
Thank you for your help S.Lott and Emil Stenström. I wish I could accept both your answers because they are both helped alot.
Most important lesson Tests only work at the app level not the site level
Solution 9 - Python
Here's another one that I've just had: Check your test files are not executable. My virtualbox auto-mounted them as executable so the test discover missed them completely. I had to add them into the relevant __init__.py files before someone told me what the issue was as a work around, but now they are removed, and non-executable and everything _just_works.
Solution 10 - Python
in my case, I miss starting my functions name with test_ and when run my test with :
python manage.py test myapp
result was :
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
----------------------------------------------------------------------
Ran 0 tests in 0.000s
OK
Destroying test database for alias 'default'...
it seems Django cannot recognize my tests!
then i change myproject/myapp/test.py file like this :
from django.test import TestCase
# Create your tests here.
class apitest(TestCase):
def test_email(self):
pass
def test_secend(self):
pass
after that result is:
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
..
----------------------------------------------------------------------
Ran 2 tests in 2.048s
OK
Destroying test database for alias 'default'...
Solution 11 - Python
I had this happen when I had a test.py file, and a test/ subdirectory, in the same Django app directory. I guess I'm confusing python or the test runner whether I'm looking for a test module (in test.py) or a test package (in test/ subdir).
Solution 12 - Python
I know I am late at this point but I also had trouble with
Found 0 test(s).
System check identified no issues (1 silenced).
----------------------------------------------------------------------
Ran 0 tests in 0.000s
OK
I have followed all the steps still I was facing the same issue. My fix was I missed __init__.py file in the test directory. Adding the file and re-running the command solved my issue.
HIGHLIGHTING IT A BIT:
Make sure you have __init__.py file
Solution 13 - Python
See https://docs.djangoproject.com/en/1.11/topics/testing/overview/
The most common reason for tests not running is that your settings aren't right, and your module is not in INSTALLED_APPS.
We use django.test.TestCase instead of unittest.TestCase. It has the Client bundled in.
https://docs.djangoproject.com/en/1.11/topics/testing/tools/#django.test.TestCase
Solution 14 - Python
If you are trying to run a test in your main app, such as my_app/my_app/ make sure you have the following checked:
- App name is listed in INSTALLED_APPS inside
settings.py - Make sure your
DATABASES['default']insidesettings.pyis set properly - The App has a
models.py(even if you are not using one, at least an empty one is required to be there)
Solution 15 - Python
Using this syntax
python manage.py test
instead of ./manage.py test solved this problem for me.
Solution 16 - Python
I had the same problem, turns out I saved the __init__ as a python file but it did not put .py at the end of its name. I added .py at the end of file's name. it was ok afterwards
(in other words, I had created __init__ instead of __init__.py )
Solution 17 - Python
In the same file, I had two test classes with the SAME NAME, and of course this prevented all tests from running.
Solution 18 - Python
I created a method called run in my test class which turned out to be a very bad idea. Python could see that I wanted to run tests, but was unable to. This problem is slightly different, but the result is the same - it made it seem as if the tests couldn't be found.
Note that the following message was displayed:
You want to run the existing test: <unittest.runner.TextTestResult run=0 errors=0 failures=0>
Solution 19 - Python
Run --help and look for verbose. Crank it to max.
I ran manage.py test --verbose and found this debug output right at the top:
>nosetests --with-spec --spec-color --verbose --verbosity=2.
Oh look! I had installed and forgotten about nosetests. And it says --verbosity=2. I figured out that 3 is the max and running it with 3 I found lots of these:
nose.selector: INFO: /media/sf_C_DRIVE/Users/me/git/django/app/tests/test_processors.py is executable; skipped
That gave me the right hint. It indeed has problems with files having the x-bit set. However, I was thrown off the track as it had run SOME of the tests - even though it explicitly said it would skip them. Changing bits is not possible, as I run the tests in a VM, sharing my Windows NTFS-disk. So adding --exe fixed it.
Solution 20 - Python
Had the same issue and it was because my filename had a - char in its name.
My filename was route-tests.py and changed it to route_tests.py
Solution 21 - Python
If you encounter this error after upgrading to Django 3, it might be because the -k parameter changed meaning from:
-k, --keepdb Preserves the test DB between runs.
to
-k TEST_NAME_PATTERNS Only run test methods and classes that match the pattern or substring. Can be used multiple times. Same as unittest -k option.
So just replace -k with --keepdb to make it work again.
Solution 22 - Python
Django engine searches files and folders with test_ prefix (inside of a tests folder). In my case it was simple solution.
So, be sure to checkout file/folder name starts with it.
Solution 23 - Python
I had the same problem, it was caused by init.py at the project root - deleted that, all tests ran fine again.