python: Wait for initial Resync in the bot tests

python/src/deltachat/testplugin.py

@@ -676,6 +676,13 @@ class BotProcess:
                     print("+++IGN:", line)
                     ignored.append(line)
 
+    def await_resync(self):
+        self.fnmatch_lines(
+            """
+            *Resync: collected * message IDs in folder INBOX*
+        """,
+        )
+
 
 @pytest.fixture()
 def tmp_db_path(tmpdir):