public void ByAction()
{
var controller = new TestableController();
var actionContext = new ActionContext(
new DefaultHttpContext(),
new RouteData(),
new ControllerActionDescriptor()
{
ActionName = nameof(TestableController.TestByAction),
ControllerName = nameof(TestableController),
ControllerTypeInfo = typeof(TestableController).GetTypeInfo()
});
controller.ControllerContext = new ControllerContext(actionContext);
foreach (var category in controller.TestByAction())
{
Assert.Null(category.Children);
}
}