public void Save_Action_Will_Open_SaveDialog()
        {
            var dialogModel = new SaveFileDialogViewModel {
                Result = true
            };

            _dialogService.Expect(x => x.ShowSaveFileDialog(dialogModel));
            _viewModelFactory.Expect(x => x.Create <ISaveFileDialogViewModel>()).Return(dialogModel);

            var viewModel = CreateProjectViewModel();

            viewModel.Save();

            _dialogService.AssertWasCalled(x => x.ShowSaveFileDialog(Arg.Is(dialogModel)), x => x.Repeat.Once());
        }