Hi everyone,

I am using nested content frequently in my solution and I fail a bit when I try to unit test them.

I fetch the nested content with this line of code

var elements = pageContent.Value("nestedContentAlias", defaultValue: Enumerable.Empty<IPublishedElement>());

And this works fine when the site is run. But how do I mock this? I've tried alot of different approaches for this. At first, when the test was run, Umbraco threw error when above line was run.

System.InvalidCastException HResult=0x80004002 Message=Unable to cast object of type 'System.Collections.Generic.List`1[Umbraco.Core.Models.PublishedContent.IPublishedElement]' to type 'Umbraco.Core.Models.PublishedContent.IPublishedValueFallback'. Source=Umbraco.Core StackTrace: at Umbraco.Core.FactoryExtensions.GetInstance[T](IFactory factory) at Umbraco.Core.Composing.Current.getPublishedValueFallback() at Umbraco.Web.Composing.Current.getPublishedValueFallback()

I managed to bypass this by doing this in the test setup (row 2):

factory = Substitute.For<IFactory>();
factory.GetInstance(typeof(IPublishedValueFallback)).Returns(Substitute.For<IPublishedValueFallback>());
Current.Factory = factory;

I now get items as IEnumerable

var elements = pageContent.Value("nestedContentAlias", defaultValue: Enumerable.Empty<IPublishedElement>()); 
foreach(var element in elements)
{
    var stringValue = element.Value<string>("stringAlias");
}

but stringValue above is always null.

Can someone give examples on how I can mock a nested content where the IPublishedElement contains mocked properties?

Kind regards, Martin