Unit test user app

* adds unit test for User model and forms
* refactors functions from user_checks.py into User class and drops user_checks.py

api/tests/v1/share/test_api_sharing.py

@@ -4,7 +4,6 @@ from django.urls import reverse
 
 from konova.settings import DEFAULT_GROUP
 from konova.tests.test_views import BaseTestCase
-from konova.utils.user_checks import is_default_group_only
 
 
 class BaseAPIV1TestCase(BaseTestCase):
@@ -138,7 +137,7 @@ class APIV1SharingTestCase(BaseAPIV1TestCase):
         # Give the user only default group rights
         default_group = self.groups.get(name=DEFAULT_GROUP)
         self.superuser.groups.set([default_group])
-        self.assertTrue(is_default_group_only(self.superuser))
+        self.assertTrue(self.superuser.is_default_group_only())
 
         # Add only him as shared_users an object
         self.intervention.users.set([self.superuser])

api/views/views.py

@@ -18,7 +18,6 @@ from compensation.models import EcoAccount
 from ema.models import Ema
 from intervention.models import Intervention
 from konova.utils.message_templates import DATA_UNSHARED
-from konova.utils.user_checks import is_default_group_only
 from user.models import User, Team
 
 
@@ -321,7 +320,7 @@ class AbstractModelShareAPIView(AbstractAPIView):
         for team_name in new_teams:
             new_teams_objs.append(Team.objects.get(name=team_name))
 
-        if is_default_group_only(self.user):
+        if self.user.is_default_group_only():
             # Default only users are not allowed to remove other users from having access. They can only add new ones!
             new_users_to_be_added = User.objects.filter(
                 username__in=new_users