Do not allow to save drafts in non-writeable chats, fix #1986 (#1997)

python/tests/test_account.py

@@ -1032,6 +1032,16 @@ class TestOnlineAccount:
         assert msg_in.text == text2
         assert ac1.get_config("addr") in [x.addr for x in msg_in.chat.get_contacts()]
 
+    def test_no_draft_if_cant_send(self, acfactory):
+        """Tests that no quote can be set if the user can't send to this chat"""
+        ac1 = acfactory.get_one_online_account()
+        device_chat = ac1.get_device_chat()
+        msg = Message.new_empty(ac1, "text")
+        device_chat.set_draft(msg)
+
+        assert not device_chat.can_send()
+        assert device_chat.get_draft() is None
+
     def test_prefer_encrypt(self, acfactory, lp):
         """Test quorum rule for encryption preference in 1:1 and group chat."""
         ac1, ac2, ac3 = acfactory.get_many_online_accounts(3)