public void BitCoinPricesReturnsPrice()
        {
            var bitCoinClient = new TestableBitcoinPrices(webClient.Object);

            bitCoinClient.Run();
            this.webClient.Verify(x => x.DownloadString(It.IsAny <string>()), Times.Once);
        }
        public void BitCoinPricesDoesNotThrowsIfNoResult()
        {
            this.webClient.Setup(x => x.DownloadString(It.IsAny <string>())).Returns("");

            var bitCoinClient = new TestableBitcoinPrices(webClient.Object);

            bitCoinClient.Run();
            this.webClient.Verify(x => x.DownloadString(It.IsAny <string>()), Times.Once);
        }