How do you use Moq to mock a simple interface?

Question

Okay, I have a business logic class like this:

Note: For context, Vendor Briefs are simple entities that describe a "download" for a PDF document.

/// <summary> /// Houses business level functions for dealing with vendor briefs. /// </summary> public class VendorBriefController : IVendorBriefController {     /// <summary>     /// Vendor brief controller requires an instance of IVendorBriefRepository.     /// </summary>     IVendorBriefRepository _vendorBriefRepository;      /// <summary>     /// Initializes an instance of VendorBriefController.     /// </summary>     public VendorBriefController(IVendorBriefRepository vendorBriefRepository)     {         _vendorBriefRepository = vendorBriefRepository;     }      /// <summary>     /// Get a list of string filters for vendor briefs.     /// </summary>     /// <returns>A list of string filters.</returns>     public dynamic GetFilters()     {         List<string> filters = new List<string>         {             "All",             "Active",             "Inactive"         };         return filters;     }      /// <summary>     /// Retrieve vendor brief entity from the repository by its unique ID.     /// </summary>     /// <param name="Id">The unique ID of the vendor brief.</param>     /// <returns>A vendor brief entity.</returns>     public VendorBrief GetVendorBriefForEditing(int Id)     {         var vendorBrief = _vendorBriefRepository.GetVendorBrief(Id);         return vendorBrief;     }      /// <summary>     /// Get a dynamic list of vendor briefs from the repository based on the supplied filter.     /// </summary>     /// <param name="filter">The filter to be used when retrieving vendor briefs.</param>     /// <returns>A dynamic sorted & filtered list of vendor briefs to be displayed in a grid view.</returns>     public dynamic GetVendorBriefList(string filter)     {         IEnumerable<VendorBrief> results = _vendorBriefRepository.GetVendorBriefs();         switch (filter)         {             default:                 results = _vendorBriefRepository.GetVendorBriefs();                 break;             case "Active":                 results = _vendorBriefRepository.GetVendorBriefs(true);                 break;             case "Inactive":                 results = _vendorBriefRepository.GetVendorBriefs(false);                 break;         }         return from x in results                orderby x.DisplayOrder                select new                {                    ID = x.VendorBriefID,                    Title = x.Title,                    Active = x.IsActive,                    DisplayOrder = x.DisplayOrder                };     }      /// <summary>     /// Save changes to the underlying repository in order to persist changes made to self-tracking vendor brief entities.     /// </summary>     /// <param name="vendorBrief"></param>     public void EditVendorBrief(VendorBrief vendorBrief)     {         _vendorBriefRepository.SaveChanges();     }      /// <summary>     /// Remove a vendor brief from the underlying repository.     /// </summary>     /// <param name="vendorBrief">The vendor brief to be removed.</param>     public void DeleteVendorBrief(VendorBrief vendorBrief)     {         _vendorBriefRepository.DeleteVendorBrief(vendorBrief);         _vendorBriefRepository.SaveChanges();     }      /// <summary>     /// Add a vendor brief to the underlying repository.     /// </summary>     /// <param name="vendorBrief">The vendor brief to be added.</param>     public void AddVendorBrief(VendorBrief vendorBrief)     {         _vendorBriefRepository.AddVendorBrief(vendorBrief);         _vendorBriefRepository.SaveChanges();     } } 

I am taking my first steps into unit testing and I'm learning about Moq. I don't want a whole unit test class written for this (unless you feel like it of course :P) but a simple sample will do. I'm assuming I need to "mock" IVendorBriefRepository so that I can pass it into the constructor when building my controller (not to be confused with mvc controllers), but I'm not sure how to do it. A sample using some of my own code will really help me get started.

Thanks in advance!

Answer 1

Something like this would test DeleteVendorBrief, for example.

Mock<IVendorBriefRepository> mock = new Mock<IVendorBriefRepository>();  VendorBriefController controller = new VendorBriefController(mock.Object);  VendorBrief brief = new VendorBrief();  controller.DeleteVendorBrief(brief);  mock.Verify(f=>f.DeleteVendorBrief(brief)); mock.Verify(f=>f.SaveChanges());