* [ADD] Unit testing. Work in progress.

* [MOD] Improved accounts search filtering by using an operator (AND/OR) for searching filters. The operator will work on any filter field set (text, client, category and tags).

lib/SP/Mvc/Model/QueryCondition.php

@@ -69,7 +69,7 @@ class QueryCondition
             throw new \RuntimeException(__u('Tipo de filtro inválido'));
         }
 
-        return $this->hasFilters() ? implode($type, $this->query) : null;
+        return $this->hasFilters() ? '(' . implode($type, $this->query) . ')' : null;
     }
 
     /**