public void WhenCallGetQuantityWithoutName_ReturnsBadRequestErrorMessageResult()
        {
            string name = string.Empty;

            _bookStoreService.Setup(m => m.BookQuantity(name)).Returns(1);
            BookStoreController controller = new BookStoreController(_bookStoreService.Object);

            var result = controller.GetQuantity(name);

            Assert.IsNotNull(result);
            Assert.IsInstanceOf(typeof(BadRequestErrorMessageResult), result);
        }
        public void WhenCallGetQuantityWithName_ReturnsOk()
        {
            string name = "name of a book";

            _bookStoreService.Setup(m => m.BookQuantity(name)).Returns(1);
            BookStoreController controller = new BookStoreController(_bookStoreService.Object);

            var result = controller.GetQuantity(name);

            Assert.IsNotNull(result);
            Assert.IsInstanceOf(typeof(OkNegotiatedContentResult <int>), result);
        }