test: add get_protected_chat to testplugin.py

python/src/deltachat/testplugin.py

@@ -10,6 +10,7 @@ import time
 import weakref
 import random
 from queue import Queue
+from threading import Event
 from typing import Callable, Dict, List, Optional, Set
 
 import pytest
@@ -590,6 +591,25 @@ class ACFactory:
         ac2.create_chat(ac1)
         return ac1.create_chat(ac2)
 
+    def get_protected_chat(self, ac1: Account, ac2: Account):
+        class SetupPlugin:
+            def __init__(self) -> None:
+                self.member_added = Event()
+
+            @account_hookimpl
+            def ac_member_added(self, chat: deltachat.Chat, contact, actor, message):
+                self.member_added.set()
+
+        setupplugin = SetupPlugin()
+        ac1.add_account_plugin(setupplugin)
+        chat = ac1.create_group_chat("Protected Group", verified=True)
+        qr = chat.get_join_qr()
+        ac2.qr_join_chat(qr)
+        setupplugin.member_added.wait(timeout=30)
+        ac2.wait_next_incoming_message()
+        ac2.wait_next_incoming_message()
+        return chat
+
     def introduce_each_other(self, accounts, sending=True):
         to_wait = []
         for i, acc in enumerate(accounts):