Misc improvements/fixes to the tests (#259)

* the child-parent-test failed on some servers due to missig dtend

* ah ... bad cut'n'paste, we're creating a calendar that should only accept journal entries, then we try to put events there ...

* apparently, zimbra ignores attempts to set relation ships attributes

* fixup! apparently, zimbra ignores attempts to set relation ships attributes

tests/compatibility_issues.py

@@ -179,7 +179,10 @@
         """when querying for the current user principal property, server doesn't report anything useful""",
 
     'read_only':
-        """The calendar server does not support PUT, POST, DELETE, PROPSET, MKCALENDAR, etc"""
+        """The calendar server does not support PUT, POST, DELETE, PROPSET, MKCALENDAR, etc""",
+
+    'no_relships':
+        """The calendar server does not support child/parent relationships between calendar components""",
 }
 
 xandikos = [
@@ -245,6 +248,7 @@
     'vtodo_datesearch_notime_task_is_skipped',
     'category_search_yields_nothing',
     'text_search_is_exact_match_only',
+    'no_relships',
 
     ## extra features not specified in RFC5545
     "calendar_order",

tests/test_caldav.py

@@ -1320,18 +1320,22 @@ def testSearchTodos(self):
 
     def testCreateChildParent(self):
         self.skip_on_compatibility_flag("read_only")
-        c = self._fixCalendar(supported_calendar_component_set=["VJOURNAL"])
+        self.skip_on_compatibility_flag("no_relships")
+        c = self._fixCalendar(supported_calendar_component_set=["VEVENT"])
         parent = c.save_event(
             dtstart=datetime(2022, 12, 26, 19, 15),
+            dtend=datetime(2022, 12, 26, 20, 00),
             summary="this is a parent event test",
         )
         child = c.save_event(
             dtstart=datetime(2022, 12, 26, 19, 17),
+            dtend=datetime(2022, 12, 26, 20, 00),
             summary="this is a child event test",
             parent=[parent.id],
         )
         grandparent = c.save_event(
             dtstart=datetime(2022, 12, 26, 19, 00),
+            dtend=datetime(2022, 12, 26, 20, 00),
             summary="this is a grandparent event test",
             child=[parent.id],
         )