How to Shim DbContext with Microsoft Fakes?
c#, entity-framework, mocking, testing
Solution
I have managed to do it by creating a `SaveChanges` method in my `BaseRepository` class and use it in all of my derived repositories where I had `db.SaveChanges`.
Then I shimed my `BaseRepository` so that my `SaveChanges` method would do nothing
Problem
I am creating a unit test that invokes a create task method. The create task method calls some mocked external object which are the purpose of my test, but inside my tested method there is also a `SaveChanges` call that saves my task. What I am trying to do is to shim the `DbContext` class inside `System.Data.Entity` so that the `SaveChanges` method no longer accesses the database. I have added a fake assembly for `System.Data.Entity` but when I use `System.Data.Entity`.Fakes it says "cannot resolve symbol 'Fakes'", though I can access `System.Data.Fakes` (but I have't added a fake assembly for System.Data) I have faked other methods in my entities context, but I can't fake SaveChanges method on my entity since the method is inherited from DbContext. ``` ShimDBEntities.AllInstances.SaveChanges = (x) => { ... }; ``` the upper chunk of code says "cannot resolve symbol 'SaveChanges'". So how can I shim DbContext using Microsoft Fakes?