模拟调用SQL Server存储过程？

Question

I am implementing an interface into a C# class, whose entire job is basically just to call some T-SQL stored procedures and return the data. Other implementations of the interface may obtain data through web-services, reading files, etc, so to test this particular class I'd ideally mock an SQL Server database and its procedures.

I'm not sure if this is feasible. I've seen tools like RhinoMock used to mock database tables but since the entire purpose of my code is to talk to a DB, can I mock the entire DB or is that a bit of a waste of time? I'd ideally like a way to transparently provide a replacement for having a real DB so local testing can be done, making real stored-procedure calls against a fake DB.

Answer 1

If you are building unit tests then you should not execute the stored procedure and you should stub this interface.

If you are building integration tests then you must have it all working.

In both cases your class shouldn't do it directly, you should have an inner handler like IDbHandler and during your unit tests you should mock it and during the integration tests you should use your concrete implementation.

The purpose of having a mock is to verify that the other side (DB in your case) got a request with the expected parameters but a physical component can't be mocked so just by adding an interface between your code and the physical component will enable those validations.

BTW I would start with having the unit tests and just afterwards add the integration tests.