Django test case ValueError: The given username must be set

I am testing a Django application, for its user sign-up feature, whether the posted data is correct and post request executes successfully.

In views.py, the Class CustomerSignUpView

class CustomerSignUpView(View):
  def post(self, request):
    name_r = request.POST.get('customer_username')
    password_r = request.POST.get('customer_password')
    email_r = request.POST.get('customer_email')

    contact_number_r = request.POST.get('customer_contact_number')
    profile_picture_r = request.POST.get('customer_profile_picture')

    if checkemail(email_r):
        # receiving an error here in TEST CASE not in actual program execution
        c = User(username=name_r, password=password_r, email=email_r)
        c.save()

        p = Profile(user=c, phone_number=contact_number_r, profile_picture=profile_picture_r)
        p.save()

        return render(request, 'catalog/customer_login.html')
    else:
        return render(request, 'catalog/customer_signup.html')

  def get(self, request):
    return render(request, 'catalog/customer_signup.html')

This is the test case for user account creation:

  class CustomerSignUpViewTest(TestCase):
"""
    Test case for User Sign in
"""
    def test_registration_view_post_success(self):
    """
        A ``POST`` to the ``customer_signup`` view with valid data properly
        creates a new user and issues a redirect.
    """
       data = {
        'username': 'testuser1',
        'password': '1X<ISRUkw+tuK',
        'email': 'foobar@test.com',
        'phone_number': '9876543210',
       }
       response = self.client.post(reverse('customer_signup'), data, follow=True)
       self.assertEqual(response.status_code, 200)
       self.assertTrue(response.url.startswith('/catalog/customer_login/'))

The test encounters the following error: ValueError('The given username must be set')

Error
Traceback (most recent call last):
File "/Users/sndtcsi/PycharmProjects/Library/catalog/tests.py", line 54, in test_registration_view_post_success
response = self.client.post(reverse('customer_signup'), data, follow=True)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/test/client.py", line 535, in post
response = super().post(path, data=data, content_type=content_type, secure=secure, **extra)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/test/client.py", line 349, in post
secure=secure, **extra)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/test/client.py", line 414, in generic
return self.request(**r)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/test/client.py", line 495, in request
raise exc_value
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/core/handlers/base.py", line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/core/handlers/base.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/views/generic/base.py", line 88, in dispatch
return handler(request, *args, **kwargs)
File "/Users/sndtcsi/PycharmProjects/Library/catalog/views.py", line 107, in post
c = User.objects.create_user(username=name_r, password=password_r, email=email_r)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/contrib/auth/models.py", line 150, in create_user
return self._create_user(username, email, password, **extra_fields)
File "/Users/sndtcsi/PycharmProjects/Library/venv/lib/python3.7/site-packages/django/contrib/auth/models.py", line 139, in _create_user
raise ValueError('The given username must be set')

While my sign-up feature works perfectly, the test execution shows that the username is not set. I do not understand why that is happening.

Solution

You are using bad key in your TestCase. You are trying to get customer_username in the form in your view, but you are actually posting username key in the data in your TestCase. To make this work you should make this lines to use the same keys:

name_r = request.POST['customer_username']  
and
'username': 'testuser1',

The same problems are with all another forms in this your code.