#31 API Tests

* writes test for sharing using the API
* fixes bug on frontend form where an exception occured on generating a new API token if no token existed, yet
* adds permission constraint (default group) for using the api in general
* fixes default-group-only behaviour for sharing-API, so users can only add new users and not removing them, as long as they do not have any other group membership like registration or conservation office
* changes 'ksptoken' to 'Ksptoken' to match CGI standard for http header keys

konova/tests/test_views.py

@@ -7,6 +7,7 @@ Created on: 26.10.21
 """
 import datetime
 
+from ema.models import Ema
 from user.models import User
 from django.contrib.auth.models import Group
 from django.contrib.gis.geos import MultiPolygon, Polygon
@@ -52,6 +53,7 @@ class BaseTestCase(TestCase):
         cls.intervention = cls.create_dummy_intervention()
         cls.compensation = cls.create_dummy_compensation()
         cls.eco_account = cls.create_dummy_eco_account()
+        cls.ema = cls.create_dummy_ema()
         cls.create_dummy_states()
         cls.create_dummy_action()
         cls.codes = cls.create_dummy_codes()
@@ -168,6 +170,30 @@ class BaseTestCase(TestCase):
         )
         return eco_account
 
+    @classmethod
+    def create_dummy_ema(cls):
+        """ Creates an ema which can be used for tests
+
+        Returns:
+
+        """
+        # Create dummy data
+        # Create log entry
+        action = UserActionLogEntry.get_created_action(cls.superuser)
+        geometry = Geometry.objects.create()
+        # Create responsible data object
+        responsible_data = Responsibility.objects.create()
+        # Finally create main object, holding the other objects
+        ema = Ema.objects.create(
+            identifier="TEST",
+            title="Test_title",
+            responsible=responsible_data,
+            created=action,
+            geometry=geometry,
+            comment="Test",
+        )
+        return ema
+
     @classmethod
     def create_dummy_states(cls):
         """ Creates an intervention which can be used for tests