refine handling of accepted contacts in example

python/examples/echo_and_quit.py

@@ -11,10 +11,11 @@ class EchoPlugin:
         if message.text.strip() == "/quit":
             message.account.shutdown()
         else:
-            ch = message.get_sender_chat()
+            # unconditionally accept the chat
+            message.accept_sender_contact()
             addr = message.get_sender_contact().addr
             text = message.text
-            ch.send_text("echoing from {}:\n{}".format(addr, text))
+            message.chat.send_text("echoing from {}:\n{}".format(addr, text))
 
     @deltachat.hookspec.account_hookimpl
     def process_message_delivered(self, message):

python/examples/test_examples.py

@@ -22,7 +22,6 @@ def test_echo_quit_plugin(acfactory):
 
     def run_bot():
         print("*"*20 + " starting bot")
-        print("*"*20 + " bot_ac.dbpath", bot_ac.db_path)
         echo_and_quit.main([
             "echo",
             "--show-ffi",
@@ -40,6 +39,7 @@ def test_echo_quit_plugin(acfactory):
     ch1.send_text("hello")
     reply = ac1._evtracker.wait_next_incoming_message()
     assert "hello" in reply.text
+    assert reply.chat == ch1
     ch1.send_text("/quit")
     t.join()