public async void GetItemClassesAsync_Gets_Item_Classes()
        {
            IWarcraftClient warcraftClient = BuildMockClient(
                requestUri: "https://us.api.blizzard.com/wow/data/item/classes?locale=en_US",
                responseContent: Resources.ItemClassesResponse);

            RequestResult <IList <ItemClass> > result = await warcraftClient.GetItemClassesAsync();

            Assert.NotNull(result.Value);
            Assert.NotEmpty(result.Value);
        }