How fix error in unit test? | AssertionError

Question

I am trying to write unit-test to my create function in Django project. This is my first experience creating of unit-tests. Why I cant create new data? From error I understand that there is no articles in test database. Where I did mistake?

tests.py:

class ArticleViewTestCase(TestCase):
    def setUp(self):
        self.user = User.objects.create(
            username='user',
            email='[email protected]',
            password='password'
        )
        self.client = Client()
    
    def test_article_create(self):
        self.assertTrue(self.user)
        self.client.login(username='user', password='password')
        response = self.client.get('/article/create/')
        self.assertEquals(response.status_code, 200)

        with open('/home/nurzhan/Downloads/planet.jpg', 'rb') as image:
            imageStringIO = StringIO(image.read()) # <-- ERROR HERE

        response = self.client.post(
            '/article/create/',
            content_type='multipart/form-data',
            data={
                'head': 'TEST',
                'opt_head': 'TEST',
                'body': 'TEST',
                'location': 1,
                'public': True,
                'idx': 0,
                'image': (imageStringIO, 'image.jpg')
            },
            follow=True
        )
        self.assertEqual(response.status_code, 200)
        self.assertEqual(Article.objects.all().count(), 1)

ERROR:

Traceback (most recent call last):
  File "/home/nurzhan/CA/article/tests.py", line 26, in test_article_create
    imageStringIO = StringIO(image.read())
TypeError: 'module' object is not callable

Answer 1

You can override form_invalid and check it data in your test

class ArticleCreateView(CreateView):
    # YOUR code here

   def form_invalid(self, form):
        data = {'status': False, 'errors': form.errors}
        return JsonResponse(data, , status=500)

in test method:

with open('/home/nurzhan/Downloads/planet.jpg', 'rb') as image:
    response = self.client.post('/article/create/',
        data={
            'head': 'TEST',
            'opt_head': 'TEST',
            'body': 'TEST',
            'location': 1,
            'public': True,
            'idx': 0,
            'image': image
        },
        follow=True, format='multipart'
     )