gistfile1.cs

public abstract class RavenSingleProjectionSpecification<TViewModel>
	: QuerySpecification<List<Event>, TViewModel>
{
	public List<Event> Given = new List<Event>();
	public RavenRelativeUri Key;

	public RavenSingleProjectionSpecification()
	{
		var store = new EmbeddableDocumentStore
		{
			RunInMemory = true,
			//UseEmbeddedHttpServer = true,
		}
			.CustomizeWith(RavenConventions.Standard)
			.Initialize();
		var provider = new DocumentSessionProvider
		{
			CurrentSession = store.OpenSession()
		};
		var bus = new Bus();
		bus.RegisterReadModel(provider);

		On = () => Given;

		When = events =>
		{
			events.Each(bus.Publish);
			provider.CurrentSession.SaveChanges();
			using (var session = store.OpenSession())
			{
				return session.Load<TViewModel>((ValueType)Key);
			}
		};
	}
}

public class SomeDocumentSpecification : RavenSingleProjectionSpecification<SomeDocument> {}

public class Specifications
{
	public SomeDocumentSpecification not_important = new SomeDocumentSpecification
	{
		Given = 
		{
			new SomeEvent()
		},
		Key = "/not-important",
		Expect = 
		{
			result => result.SomeProperty == "Something"
		}
	}
}