Unittesting Confirmation in WPF Prism

Question

I'm using the Confirmation class of Prism to ask users for Confirmation. When I'am unittesting the return value of the confirmation is always false. Maybe I could make the setter of the InteractionRequest public. My Code now looks like this and my unit test should verify that this.copyService.Execute is called.

public InteractionRequest<Confirmation> CopyProjectConfirmationRequest { get; private set; }

    bool confirmationResult = false;
    DialogConfirmation dialogConfirmation = new DialogConfirmation
                                              {
                                                Title = "Copy and Convert Project",
                                                Content = string.Format("This Project was created with Version {0} to be used with currentVersion({1}) it must be converted should it copyed and converted Project", projectVersion, toolVersion),
                                                ConfirmButtonText = "Copy & Convert",
                                                DeclineButtonText = "Cancel"
                                              };

    this.CopyProjectConfirmationRequest .Raise(dialogConfirmation, cb => { confirmationResult = cb.Confirmed; });

    if (confirmationResult)
    {
      this.copyService.Execute(this.Model);
    }

Answer 1

The Solution was quit simple. Just add this in the UnitTest

  sut.CopyProjectConfirmationRequest.Raised += (s, e) =>
  {
    Confirmation context = e.Context as Confirmation;
    context.Confirmed = true;
    e.Callback();
  };

Answer 2

You can try mocking the copyService and testing against the mock Possible implementation with Moq

Mock<ICopyService> mockService;

.... inject in VM or the class that has the CopyProjectConfirmationRequest property.

mockService.Verify(x => x.Execute(It.Is<Model>(...));

As for the CopyProjectConfirmationRequest I would make the property public, and stub it in the unit test.