What is the test for screening a second or successive federal habeas corpus petition?

The Antiterrorism and Effective Death Penalty Act ("AEDPA") instituted a "gatekeeping" procedure for screening second or successive federal habeas corpus petitions. Felker v. Turpin , 518 U.S. 651, 657, 116 S.Ct. 2333, 135 L.Ed.2d 827 (1996). Before filing such a petition in district court, a state prisoner must obtain authorization from the court of appeals. 28 U.S.C. 2244(b)(3)(A). The court of appeals must deny the motion unless it makes a "prima facie showing" both that the motion presents a claim not previously raised and that it satisfies one of two narrow exceptions. Id. 2244(b).