Quick one today. I was writing some code for Sitecore Computed Index fields recently, and it took me more Google Effort than I felt it should have to work out how to write unit tests with FakeDB to verify the code worked. If you want to do that without spending a while searching, the answer is pleasingly simple:

When you declare a computed field, the key method you’re implementing looks like this:

publicoverrideobjectComputeFieldValue(IIndexableindexable){}

But when you implement a test using FakeDb you’re dealing withItem objects:

[TestMethod]publicvoidClassUnderTest_Description_OfTheTestCase(){using(vardb=ComputedFieldsFakeDb.Create()){varitm=Sitecore.Context.Database.GetItem("/sitecore/content/TheItemToIndex");varsut=newComputedFieldUnderTest();varresult=sut.ComputeFieldValue(/* what goes here to do the mapping? */);Assert.AreEqual("somevalue",result);}}

So what do you do to map theItem into anIIndexable?

Well, turns out it’s pretty trivial – There’s a type calledSitecoreIndexableItem which wraps anItem to give you anIIndexable:

varresult=sut.ComputeFieldValue(newSitecore.ContentSearch.SitecoreIndexableItem(itm));

Simple.