public function test_build_auth_array()
 {
     $action = new ActionAuthorization('toto', 2);
     $action->set_roles_auths(new RolesAuthorizations(array('r1' => 1)));
     self::assertEquals(array('r1' => 2), $action->build_auth_array());
     $action->set_bit(4);
     self::assertEquals(array('r1' => 4), $action->build_auth_array());
 }