public void GetRates_ReturnsActionResult_WithAListOfSymbols()
        {
            // Arrange
            var symbol      = "BTC";
            var convertTo   = new string[] { "USD", "GBP" };
            var symbolRates = new List <SymbolRate> {
                new SymbolRate {
                    Name = "USD", PriceDetail = new PriceDetail {
                        Price = 1, LastUpdated = DateTime.Now
                    }
                },
                new SymbolRate {
                    Name = "GBP", PriceDetail = new PriceDetail {
                        Price = 2, LastUpdated = DateTime.Now
                    }
                },
            };

            _mockCryptoLogic
            .Setup(repo => repo.GetQuotes(It.IsAny <string>(), It.IsAny <string>(), symbol, convertTo))
            .Returns(symbolRates);

            // Act
            var result = _target.GetRates(symbol, convertTo);

            // Assert
            var viewResult = Assert.IsType <OkObjectResult>(result);
            var model      = Assert.IsAssignableFrom <IEnumerable <SymbolRate> >(
                viewResult.Value);

            Assert.Equal(symbolRates.Count(), model.Count());
        }