private CommandScriptHandler handler(String... keyValuePairs) {
   Map<String, String> conf = map(keyValuePairs);
   ServiceProfile<CommandScriptHandler> profile =
       new ServiceProfile<CommandScriptHandler>(
           "command.testing",
           MockCommandScriptHandler.class,
           conf,
           ProfileContext.system(getClass().getClassLoader()));
   try {
     return profile.newInstance();
   } catch (Exception e) {
     throw new AssertionError(e);
   }
 }