What is the test for determining whether a prisoner has been denied access to legal documents by the Department of Justice?

Additionally, the prisoner must allege an actual injury. See id. at 349. "Actual injury" is prejudice with respect to contemplated or existing litigation, such as the inability to meet a filing deadline or present a non-frivolous claim. See id.; see also Phillips v. Hust, 477 F.3d 1070, 1075 (9th Cir. 2007). Delays in providing legal materials or assistance which result in prejudice are "not of constitutional significance" if the delay is reasonably related to legitimate penological purposes. Lewis, 518 U.S. at 362.