ft(Tests) Test the normalize_dates helper function

- Test that the `validate_dates` function works if dates are correct or wrong
- Fix issue with past dates. Now we always use current dates in the tests

[Finishes #168261941]

server/graphql_schemas/tests/utils/test_helpers.py

@@ -1,9 +1,13 @@
 """Module that tests helper methods"""
 from unittest.mock import patch
+
+import datetime
+
 from graphql_schemas.utils.helpers import (
     update_event_status_on_calendar,
     remove_event_from_all_calendars,
-    add_event_to_calendar
+    add_event_to_calendar,
+    normalize_dates
 )
 from api.tests.base_test_setup import BaseSetup
 
@@ -89,3 +93,29 @@ def test_add_event_to_calendar(self):
         self.assertEqual(mock_build.call_count, 1)
         self.assertEqual(event.event_id_in_calendar, 1)
         mock_build_patcher.stop()
+
+    def test_normalize_dates_function_success(self):
+        """
+        Test that dates have to be in the present for them to be accepted
+        """
+        start_date = datetime.date.today()
+        end_date = start_date + datetime.timedelta(days=1)
+
+        result = normalize_dates(end_date, start_date, datetime.date.today())
+
+        self.assertEqual(
+            result, {'status': True, 'message': 'Validation successful'})
+
+    def test_normalize_dates_function_if_end_date_invalid(self):
+        """
+        Test that the event must end in the future, after the event start date
+        """
+        start_date = datetime.date.today() + datetime.timedelta(days=2)
+        end_date = datetime.date.today()
+
+        result = normalize_dates(end_date, start_date, datetime.date.today())
+
+        self.assertEqual(
+            result, {
+                'status': False,
+                'message': 'Sorry, end date must be after start date'})