title: Microsoft.EntityFrameworkCore.InMemory alternative for EF non-Core?
body: <p>I have inherited a large legacy project which makes broad-use of Entity Framework (non-Core) and has literally no tests. It leverages some features which will not allow me to upgrade to ASP.NET Core or EF Core -- at least not yet. Anyway, I would like to build sufficient testing to give me confidence in the code. This is when I realized that Microsoft.EntityFrameworkCore.InMemory will not be available to me. Are there any alternatives which will allow me to unit test EF non-Core in the same way?</p>
  
  <p>Thanks!</p>