#19 Tests

* adds workflow tests or deductions in InterventionWorkflowTestCase
* fixes bugs detected by testing

konova/tests/test_views.py

@@ -8,6 +8,7 @@ Created on: 26.10.21
 from abc import abstractmethod
 
 from django.contrib.auth.models import User, Group
+from django.core.exceptions import ObjectDoesNotExist
 from django.test import TestCase, Client
 from django.urls import reverse
 
@@ -355,3 +356,22 @@ class BaseWorkflowTestCase(BaseTestCase):
         cls.client_user = Client()
         cls.client_user.login(username=cls.superuser.username, password=cls.superuser_pw)
         cls.client_anon = Client()
+
+    def assert_object_is_deleted(self, obj):
+        """ Provides a quick check whether an object has been removed from the database or not
+
+        Args:
+            obj ():
+
+        Returns:
+
+        """
+        # Expect the object to be gone from the db
+        try:
+            obj.refresh_from_db()
+            # Well, we should not reach this next line of code, since the object should be gone, therefore not
+            # refreshable -> fail!
+            self.fail()
+        except ObjectDoesNotExist:
+            # If we get in here, the test was fine
+            pass