Joseph Tests His Brothers

Joseph's brothers had a proven record of acting deceitfully. They'd betrayed him and sold him into slavery despite his please for mercy. Joseph begged, but his cries fell of deaf ears and hardened hearts. By God's hand, however, Joseph went from the prison to the palace having become the governor of Egypt. Twenty years later, and two years into a sever famine, Joseph's brothers arrive in Egypt to buy food from Jospeh whom they did not recognize. What will Joseph do? The tables had turned. Was Joseph toying with his brothers or was he testing them? If testing, for what purpose?