Add assertion to check ical data is as expected

shared/tests/testcases.py

@@ -8,6 +8,8 @@ from django.test import Client
 from django.utils import timezone
 from django.utils.functional import cached_property
 
+import icalendar
+
 User = get_user_model()
 
 
@@ -92,6 +94,40 @@ class TestCaseMixin:
         else:
             self.assertEqual(actual, expected)
 
+    def _test_event_equal(self, event, exp):
+        for k, v_desc in exp.items():
+            if isinstance(v_desc, tuple):
+                v_getter = v_desc[0]
+                v = v_desc[1]
+            else:
+                v_getter = lambda v: v
+                v = v_desc
+            if v_getter(event[k.upper()]) != v:
+                return False
+        return True
+
+    def _find_event(self, ev, l):
+        for i, elt in enumerate(l):
+            if self._test_event_equal(ev, elt):
+                return elt, i
+        return False, -1
+
+    def assertCalEqual(self, ical_content, expected):
+        remaining = expected.copy()
+        unexpected = []
+
+        cal = icalendar.Calendar.from_ical(ical_content)
+
+        for ev in cal.walk('vevent'):
+            found, i_found = self._find_event(ev, remaining)
+            if found:
+                remaining.pop(i_found)
+            else:
+                unexpected.append(ev)
+
+        self.assertListEqual(unexpected, [])
+        self.assertListEqual(remaining, [])
+
 
 class ViewTestCaseMixin(TestCaseMixin):
     """