itests: allow pconfig registration with plugins

slixmpp/test/integration.py

@@ -16,7 +16,9 @@ except ImportError:
     # not usable.
     from unittest import TestCase as IsolatedAsyncioTestCase
 from typing import (
+    Dict,
     List,
+    Optional,
 )
 
 from slixmpp import JID
@@ -39,10 +41,13 @@ class SlixIntegration(IsolatedAsyncioTestCase):
         """get a str from an env var"""
         return os.getenv(name)
 
-    def register_plugins(self, plugins: List[str]):
+    def register_plugins(self, plugins: List[str], configs: Optional[List[Dict]] = None):
         """Register plugins on all known clients"""
-        for plugin in plugins:
+        for index, plugin in enumerate(plugins):
             for client in self.clients:
+                if configs is not None:
+                    client.register_plugin(plugin, pconfig=configs[index])
+                else:
                     client.register_plugin(plugin)
 
     def add_client(self, jid: JID, password: str):