private static void Assert_root_breadcrumb_values(Breadcrumb breadcrumb) { breadcrumb.ShouldNotBeNull(); breadcrumb.DisplayString.ShouldBe("ROOT"); breadcrumb.ItemTypesShouldBe<L0>(); breadcrumb.Parent.ShouldBeNull(); breadcrumb.Path.ShouldBeNull(); breadcrumb.PropertiesShouldBeNull(); }