anchor.diff:    q.add(testing_helper(test_commands_one_by_one(),"one by one"));
     q.add(testing_helper(test_incr_cas(),"transation CAS"));
     q.add(testing_helper(test_incr_cas_multiple(10),"transation CAS multiple"));
  -  
  -  
  +  q.add(testing_helper(test_transactions_failing(),"transation error handling"));  
  +  q.add(testing_helper(test_transactions_command_usable(),"transaction release connection"));
     
     Future.wait(q).then((_){print("done");})
     .then((_){
  
positive.code:             }
            });
        });
      });
    });
  }
  
negative.code: 
  
  Future testing_helper(Future f,String name){
    print("start  $name");
    return f.then((_)=>print("PASSED $name"),onError: (e)=>print("ERROR $name => $e"));
  }
  
  