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c#.netunit-testingmockinginternal

Making a class testable

So I have a class called User. It has an internal constructor. I want to create a User object though so I can mock it like this:

public ISessionManagerInstance MockedSessionManager()
{
    var manager = new Mock<ISessionManagerInstance>();
    var company = new Chatham.Web.Business.Classes.Company(500, "", "", Enumerations.WebRelationshipInfo.NotSet, "", 0, 0, Data.Login.TeamOwnership.NotSet, 0, 0, false, null, false);
    manager.Setup(p => p.Company).Returns(company);

    Chatham.Web.Business.Classes.User displayUser = typeof(Chatham.Web.Business.Classes.User);
    displayUser.EntityID = 1786;
    manager.Setup(p => p.DisplayUser).Returns(displayUser);

    return manager.Object;
}

Now, Company has a constructor, so that's easy. But User has one that's only internal. Is there any way I can create a User and just set one int property on it so I can pass that object back on the mock?

Solution

  • I can think of two possibilities:

    create an IUser interface, have User implement it and create mocks against it. This is a very common practice in the world of .NET testing. All of your methods that use Users will mostly likely need to now accept IUser references.

    Another possibility (which I don't recommend, but it's there) is to use the InternalsVisibleTo assembly attribute. Then the internals of your production assembly can be visible from your test assembly.