EntityTests.cs

using System.Linq;
using ContactList.Core.Domain;
using ContactList.Tests;
using static Testing;

public class EntityTests
{
    [AllEntities]
    public void ShouldPersist<TEntity>(TEntity entity) where TEntity : Entity
    {
        Save(entity);

        Transaction(db =>
        {
            var loaded = db.Set<TEntity>().Single();

            loaded.ShouldMatch(entity);
        });
    }
}