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()));
}