route all flexible contact add/remove through account.as_contact(obj)

python/src/deltachat/testplugin.py

@@ -396,6 +396,14 @@ def acfactory(pytestconfig, tmpdir, request, session_liveconfig, data):
             ac2.create_chat(ac1)
             return ac1.create_chat(ac2)
 
+        def accept_each_other(self, accounts, sending=False):
+            for i, acc in enumerate(accounts):
+                for acc2 in accounts[i + 1:]:
+                    chat = self.get_accepted_chat(acc, acc2)
+                    if sending:
+                        chat.send_text("hi")
+                        acc2._evtracker.wait_next_incoming_message()
+
     am = AccountMaker()
     request.addfinalizer(am.finalize)
     yield am