Unit tests when using a User model

[FoxMaSk]

Hi,

As I'm totally new with DRF, and just started my first project with it, I dont see from which side I can take the code to make my unit tests.

I read http://www.django-rest-framework.org/api-guide/testing/

And if I start from the beginning with 

• APIRequestFactory, 
• with "Creating test requests", as I my model own a FK with the User model, I dont know how I can use this example
• with "Forcing authentication", the example says to use "user = User.objects.get(username='olivia')" but how do we create the user first of all ? Or do I need to care about it and the test does not need to care about the existence of the data in the User model ?
• APIClient
• with "Making Request", the request is done but what when we have to connect a user first to then only get the data of that user, how do we do ?

I feel stuck until I dont have this clarifications. 

Can someone explain me what I'm missing ?

in case you need to see, my code is there https://github.com/orotangi/orotangi/tree/master/orotangi/api

Thanks 

Regards.

[Tom Christie]

Use APIclient, and use .autuenticate(user)

[Fox MaSk]

Hi Tom,

thanks for your reply

When using http://www.django-rest-framework.org/api-guide/testing/#apiclient with force_authenticated() now I got :

  File "/home/foxmask/DjangoVirtualEnv/orotangi/orotangi/orotangi/api/test.py", line 48, in test_create_book

    self.assertEqual(response.status_code, status.HTTP_201_CREATED)

AssertionError: 403 != 201

test.py looks like this 

def test_create_book(self):
    """
    Ensure we can create a new book object.
    """

    data = {'name': 'Book1',
            'user': self.user.username}
    
    response = self.client.post('/api/orotangi/books/', data, format='json')

    self.assertEqual(response.status_code, status.HTTP_201_CREATED)
    self.assertEqual(Books.objects.count(), 1)
    self.assertEqual(Books.objects.get().name, 'Book1')

line 48 is the 1rst assertEqual()

I noticed that the 403 error is related to this settings

REST_FRAMEWORK = {
[...]

 'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.SessionAuthentication',
        'rest_framework.authentication.BasicAuthentication'
    ),
    'TEST_REQUEST_DEFAULT_FORMAT': 'json'
}

But In my setup() I wrote :

def setUp(self):
    """
    
    :return: 
    """
    try:
        self.user = User.objects.get(username='john')
    except User.DoesNotExist:
        self.user = User.objects.create_user(username='john',
                                             email='jo...@doe.info',
                                             password='doe')

    self.client = APIClient(enforce_csrf_checks=True)
    self.client.force_authenticate(user=self.user)

so I was expecting to fill the session 

What did I do wrong ?

regards.

2017-05-01 19:17 GMT+02:00 Tom Christie <christ...@gmail.com>:

Use APIclient, and use .autuenticate(user)

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[Tom Christie]

Not sure, but start by removing the "enforce_csrf_checks=True" from your test case.

That's almost certainly not what you want.

[FoxMaSk]

Hi,

I could investigate deeper and find the the cause is due to the settings DjangoModelPermissions

When the user is created, no permissions are set for him.

If I comment this settings that gives :

----------------------------------------------------------------------

Ran 1 test in 0.071s

OK

Destroying test database for alias 'default'...

How do I set permissions to the user that will fit the DjangoModelPermissions requirements ??

Regards

[Fox MaSk]

So to finish that topic, as I set REST_FRAMEWORK that way in my settings

REST_FRAMEWORK = {
	'DEFAULT_PERMISSION_CLASSES': (
	'rest_framework.permissions.IsAuthenticated',
	'rest_framework.permissions.DjangoModelPermissions'
	),

	'DEFAULT_AUTHENTICATION_CLASSES': (
	'rest_framework.authentication.SessionAuthentication',
	'rest_framework.authentication.BasicAuthentication'
	),
	'TEST_REQUEST_DEFAULT_FORMAT': 'json'
	}

I made a permissions.py that overwrite the properties perms_map of DjangoModelPermissions

Now everything is ok when the test try to create object with a connected user.

This, This look like this 

class OrotangiTests(APITestCase):

    def setUp(self):

        self.user = User.objects.create_user(username='john',

                                             email='jo...@doe.info',

                                             password='doe')

        self.client = APIClient()

        self.client.force_authenticate(user=self.user)

class BooksTests(OrotangiTests):

    def test_get_books(self):

        """

        Ensure we can get the books list.

        """

        url = reverse('books-list')

        response = self.client.get(url, format='json')

        self.assertEqual(response.status_code, status.HTTP_200_OK)

    def test_create_book(self):

        """

        Ensure we can create a new book object.

        """

        data = {'name': 'Book1',

                'user': self.user.username}

        url = reverse('books-list')

        response = self.client.post(url, data, format='json')

        self.assertEqual(response.status_code, status.HTTP_201_CREATED)

        self.assertEqual(Books.objects.count(), 1)

        self.assertEqual(Books.objects.get().name, 'Book1')

Regards

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