store all the messages in the list.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21009 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/tests/utils.py

@@ -61,6 +61,7 @@ class DummyMailHost(MailHost):
     """Record message in _last_message."""
     self._previous_message = self._last_message
     self._last_message = (mfrom, mto, messageText)
+    self._message_list.append(self._last_message)
 
 class DummyTranslationService:
   """A dummy translation service where you can access translated msgids and