Django 1.9 unittest error for messages but i dont see the error for 1.10.4 and 1.8

问题

The test fails with the error in Django 1.9 env, but tests run perfectly well in 1.10.4 and 1.8. Can someone throw some light here !

Here is the error

add_message raise MessageFailure('You cannot add messages without installing ' MessageFailure: You cannot add messages without installing django.contrib.messages.middleware.MessageMiddleware

Check https://travis-ci.org/invaana/Hydronium/builds/182190626 for complete errors

views.py

def contact(request):
    if request.method == "POST":
        form = ContactForm(request.POST)
        if form.is_valid():
            form.save()
            messages.success(request, 'Operation Successful! This is demo. Im not sending any messages')
        else:
            form.errors
            messages.error(request, 'Message not sent, Please fix the errors!.' )
    else:
        form = ContactForm()
    return render(request, 'pages/contact.html', {'form': form})

tests.py

def test_contactform_valid(self):
    res = self.client.post(reverse('contact'), {'name':'Ravi','email':'rrmerugu@gmail.com', 'text': 'im good' })
    self.assertIn('Operation Successful', res.content)

def test_contactform_invalid(self):
    res = self.client.post(reverse('contact'), {'name':'Ravi','email':'rrmerugu@gmail.com', 'text': '' })
    self.assertIn('Message not sent', res.content)

回答1:

Apparently,

MIDDLEWARE_CLASSES is used in 1.9, 1.8

MIDDLEWARE is used in 1.10.4.

To make the middleware compatible for both, I used the following code in settings.py

MIDDLEWARE = MIDDLEWARE_CLASSES = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

来源：https://stackoverflow.com/questions/41033222/django-1-9-unittest-error-for-messages-but-i-dont-see-the-error-for-1-10-4-and-1