What is the test for habeas corpus relief for a violation of state law?

U.S. ___, 131 S.Ct. 859, 862 (2011). "Habeas corpus relief for an asserted violation of due process [arising from a violation of state law] is available only when the state court's action is arbitrary or fundamentally unfair." Cooks v. Spalding, 660 F.2d 738, 739 (9th Cir. 1981); see also Richmond v. Lewis, 506 U.S. 40, 50 (1992) (the question on habeas review is whether the asserted state law error was "so arbitrary or capricious as to constitute an independent due process or Eighth Amendment violation."), quoting Lewis v. Jeffers, 497 U.S. 764, 780 (1990).