public TariffComparisonManagerTest()
        {
            var productCache = new Mock <IProductCache>();
            var products     = new IProduct [] { new ProductA("test productA", 22, 5), new ProductB("test productB", 30, 4000, 800) };

            productCache.Setup(x => x.GetAllProducts()).Returns(products);
            _sut = new TariffComparisonManager(productCache.Object);
        }
 public TariffComparisonController(ITariffComparisonManager tariffComparisonManager)
 {
     _tariffComparisonManager = tariffComparisonManager;
 }