server-backend/base_external_dbsource/test/dbsource_connect.yml

-
  Connect to local Postgres.
- 
  !python {model: base.external.dbsource}: |
    from openerp.osv.orm import except_orm
    try:
        self.connection_test(cr, uid, [ref("demo_postgre")])
    except except_orm as e:
        assert e.value == u'Everything seems properly set up!'