What is the test for a dismissal for failure to state a claim upon which relief can be granted pursuant to FRCP 12(b)(6)?

We review de novo the district court's dismissal for failure to state a claim upon which relief can be granted pursuant to FRCP 12(b)(6). Rodriguez v. Panayiotou, 314 F.3d 979, 983 (9th Cir.2002). On appeal, "we take all of the allegations of material fact stated in the complaint as true and construe them in the light most favorable to the nonmoving party. A complaint should not be dismissed unless it appears beyond doubt that plaintiff can prove no set of facts in support of his claim which would entitle him to relief." Id. (internal citations omitted).