package mqtt
import (
"errors"
"fmt"
"strconv"
"testing"
)
func Test_openConnection(t *testing.T) {
_, err := strconv.Atoi("")
e := fmt.Errorf(" : %s", err)
t.Errorf("%#v", e)
e1 := errors.New("hogehoge %s")
t.Errorf("%#v", e1)
}