How to unit test methods that use System.Web.Security.Membership inside?

Question

I want to test a method to check that it saves a transaction correctly. Inside it calls Membership.GetUser() to verify the user which causes the test to fail each time. Is there any way to mock this so that Membership.GetUser() always returns a valid name?

I'm using Moq, C# and ASP.Net 4.5 MVC

score 5 · Answer 1 · answered Sep 13 '12 at 14:09

5

In short, you can't. That's why every call to such a "service" should be hidden behind an abstraction.

You can see a sample of that in default MVC template.

answered Sep 13 '12 at 14:09

Sergei Rogovtcev

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1

Can you elaborate? The template uses WebSecurity.Login(). What's a good way to abstract that so that the unit tests don't actually hit the database? – Scott Anderson Sep 29 '12 at 15:48
2

Found this that looks promising: http://blog.spontaneouspublicity.com/unit-testing-the-mvc4-account-controller. Is that the kind of abstraction you are talking about? – Scott Anderson Sep 29 '12 at 15:57

score 3 · Answer 2 · answered Oct 01 '12 at 20:12

Yes, like Serg said, you can mock this by providing an interface for the real service to implement. This interface would have the public methods you are calling, such as:

public interface IMyServiceInterface
{
    IMembershipUser GetUser();
    // other methods you want to use...
}

In your unit tests, you would say:

var mockService = new Mock<IServiceInterface>();
mockService.Setup(mock => mock.GetUser()).
    Returns(new MembershipUserImplementation("MyTestUser", otherCtorParams));

In my example I would create a wrapper for MembershipUser as well as it seems like it also needs to be behind an abstraction.

I use [Moq](http://code.google.com/p/moq/). It's simple and does everything I need it to do. — sfogle, Nov 13 '13 at 17:08

How to unit test methods that use System.Web.Security.Membership inside?

2 Answers2

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