test: get_protected_chat(): Use FFIEventTracker instead of dc_wait_next_msgs() (#5207)

The way it was implemented it threw out all remaining messages after finding the next incoming
message. Better use FFIEventTracker functions, they are used in all the tests anyway.

python/src/deltachat/account.py

@@ -375,22 +375,6 @@ class Account:
         dc_array = ffi.gc(lib.dc_get_fresh_msgs(self._dc_context), lib.dc_array_unref)
         return (x for x in iter_array(dc_array, lambda x: Message.from_db(self, x)) if x is not None)
 
-    def _wait_next_message_ids(self) -> List[int]:
-        """Return IDs of all next messages from all chats."""
-        dc_array = ffi.gc(lib.dc_wait_next_msgs(self._dc_context), lib.dc_array_unref)
-        return [lib.dc_array_get_id(dc_array, i) for i in range(lib.dc_array_get_cnt(dc_array))]
-
-    def wait_next_incoming_message(self) -> Message:
-        """Waits until the next incoming message
-        with ID higher than given is received and returns it."""
-        while True:
-            message_ids = self._wait_next_message_ids()
-            for msg_id in message_ids:
-                message = Message.from_db(self, msg_id)
-                if message and not message.is_from_self() and not message.is_from_device():
-                    self.set_config("last_msg_id", str(msg_id))
-                    return message
-
     def create_chat(self, obj) -> Chat:
         """Create a 1:1 chat with Account, Contact or e-mail address."""
         return self.create_contact(obj).create_chat()

python/src/deltachat/events.py

@@ -182,6 +182,12 @@ class FFIEventTracker:
                 print(f"** SECUREJOINT-INVITER PROGRESS {target}", self.account)
                 break
 
+    def wait_securejoin_joiner_progress(self, target):
+        while True:
+            event = self.get_matching("DC_EVENT_SECUREJOIN_JOINER_PROGRESS")
+            if event.data2 >= target:
+                break
+
     def wait_idle_inbox_ready(self):
         """Has to be called after start_io() to wait for fetch_existing_msgs to run
         so that new messages are not mistaken for old ones:

python/src/deltachat/testplugin.py

@@ -10,7 +10,6 @@ import time
 import weakref
 import random
 from queue import Queue
-from threading import Event
 from typing import Callable, Dict, List, Optional, Set
 
 import pytest
@@ -592,23 +591,16 @@ class ACFactory:
         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()
-        msg = ac2.wait_next_incoming_message()
+        ac2._evtracker.wait_securejoin_joiner_progress(1000)
+        ev = ac2._evtracker.get_matching("DC_EVENT_MSGS_CHANGED")
+        msg = ac2.get_message_by_id(ev.data2)
+        assert msg is not None
         assert msg.text == "Messages are guaranteed to be end-to-end encrypted from now on."
-        msg = ac2.wait_next_incoming_message()
+        msg = ac2._evtracker.wait_next_incoming_message()
+        assert msg is not None
         assert "Member Me " in msg.text and " added by " in msg.text
         return chat