Is there a boilerplate template for a TDD approach in Django-Python

I’m working on a side a project while trying to discipline myself to get accustomed to the TDD approach in Django.

I'm not sure why I’m running into this failed test

(venv) osahenru@osahenru ~/D/q-4> pytest -k test_can_post_questions
============================= test session starts ==============================
platform linux -- Python 3.10.12, pytest-8.1.1, pluggy-1.5.0
django: version: 5.0.4, settings: config.settings (from ini)
rootdir: /home/osahenru/Documents/q-4
configfile: pytest.ini
plugins: django-4.8.0
collected 5 items / 4 deselected / 1 selected                                  

app/tests/test_views.py F                                                [100%]

=================================== FAILURES ===================================
______________________ TestEvent.test_can_post_questions _______________________

self = <test_views.TestEvent testMethod=test_can_post_questions>

    def test_can_post_questions(self):
        event = Event.objects.create(name='Python Ghana')
        data = {
            'text': 'how are you?',
        }
        response = self.client.post(reverse('questions', kwargs={'pk': event.id}), data)
>       self.assertIsInstance(response.context['form'], QuestionCreateForm)
E       TypeError: 'NoneType' object is not subscriptable

app/tests/test_views.py:52: TypeError
=========================== short test summary info ============================
FAILED app/tests/test_views.py::TestEvent::test_can_post_questions - TypeError: 'NoneType' object is not subscriptable
======================= 1 failed, 4 deselected in 0.53s ========================
(venv) osahenru@osahenru ~/D/q-4 [0|1]> 

here is the test causing the error message

def test_can_post_questions(self):
        event = Event.objects.create(name='Python Ghana')
        data = {
            'text': 'how are you?',
        }
        response = self.client.post(reverse('questions', kwargs={'pk': event.id}), data)
        self.assertIsInstance(response.context['form'], QuestionCreateForm)
        self.assertEqual(response.status_code, 302)

and here is the view function

def questions(request, pk):
    event = Event.objects.get(id=pk)
    questions = Question.objects.filter(event=event)
    
    form = QuestionCreateForm()
    if request.method == 'POST':
        form = QuestionCreateForm(request.POST)
        if form.is_valid():
            question = form.save(commit=False)
            question.event = event
            question.save()
            return redirect('questions', pk=pk)
        
    context = {
        'form': form,
        'questions': questions,
        'event': event
    }
    return render(request, 'questions.html', context)

Also as a beginner in the TDD approach, is there a boilerplate for writing unit tests in general and specifically for Django? I’m really struggling with this concept. Thanks

The response being tested here is the redirect after the post, which doesn't have a context. If you want to look at the context of the final response, you need to add follow=True to your self.client.post( call - see the docs for more about client args

As far as boilerplates go, the main rule of thumb I use is, if I wrote it, I test it. So you don't need to test a form's ability to submit, as django handles that and it's hopefully well tested already. To use your code as an example, I would test that the question.event item gets added as appropriate as that is your own addition to the default submit form process.