Can it be done without using TypeMock Islolator? I've found a few suggestions online such as passing in a metadata only connection string, however nothing I've come across besides TypeMock seems to truly allow for a mock ObjectContext that can be injected into services for unit testing. Do I plunk down the $$ for TypeMock, or are there alternatives? Has nobody managed to create anything comparable to TypeMock that is open source?
+1
A:
Wrap the ObjectContext in a proxy class. Then inject that into your classes.
mxmissile
2010-04-24 04:05:48
Yes I tried that, and it is a possibility -- however all of these approaches using proxies have their own limitations. Linq works differently for one thing (Linq to objects is used, versus Linq to entities).
2010-04-24 12:12:25
+3
A:
I'm unit testing EF4 easily without mocking. What I did was create a repository interface using the code from http://elegantcode.com/2009/12/15/entity-framework-ef4-generic-repository-and-unit-of-work-prototype/ as a basis I then created an InMemoryRepository<T> class that used the IRepository interface. I then replaced the IObjectSet<T> with a List<T> inside of the class and changed the retrieval methods accordingly.
Thus if you need to do unit testing, pass in the InMemoryRepository rather than the DataRepository.
KallDrexx
2010-05-21 17:57:32