public void CurrentUserNotFoundException_is_thrown_if_current_user_cannot_be_found() { var securityManager = new Mock<ISecurityManager>(); securityManager.SetupGetCurrentUserAccountToReturnNoUserAccount(); var manager = Create.BusinessLogicClass.NavigationManager(securityManager.Object); Assert.Throws<CurrentUserNotFoundException>(() => manager.FindLocalSystems(Create.DomainClasses.ScreenSize())); }