If your tests reference an Azure Functions isolated project, you may get a compile error to do with a missing ApplicationPartAttribute class

[MaxGuernseyIII]

If your tests reference an Azure Functions isolated project, you may get a compile error having to do with a missing ApplicationPartAttribute class.

I certainly did. I struggled for quite a while trying to find the "right" solution and then realized I didn't actually need the auto-generated attributes forced into my assembly to work.

I added this class to my test assembly to get around it.

// StupidTestShimStuff.cs
// ReSharper disable once CheckNamespace
namespace Microsoft.AspNetCore.Mvc.ApplicationParts;

[AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
public class ApplicationPartAttribute : Attribute
{
    public ApplicationPartAttribute(string Ignored) {}
}