public void DeleteTest()
        {
            IProductUpdator  productUpdator  = MefBase.Resolve <IProductUpdator>();
            IProductSelector productSelector = MefBase.Resolve <IProductSelector>();

            Assert.IsTrue(productSelector.FindAll(true).Count == 15);
            productUpdator.Delete("5");
            Assert.IsTrue(productSelector.FindAll(true).Count == 14);
        }
        public void FindAllTest()
        {
            IProductSelector selector = MefBase.Resolve <IProductSelector>();

            Assert.IsTrue(selector.FindAll(true).Count == 15, $"Actual {selector.FindAll(true).Count}");
        }