public void CheckConvertEURtoUSD()
{
var mockLogger = new Mock <ILogger <RateService> >();
var mockUnitOfWork = new Mock <IUnitOfWork>();
IRateService serviceRate = new RateService(mockLogger.Object, mockUnitOfWork.Object);
List <Rate> rates = JsonConvert.DeserializeObject <List <Rate> >(_rateString);
decimal amount = 10.5m;
decimal result = 7.62m;
Assert.Equal(serviceRate.Convert(rates, "EUR", "USD", amount), result);
}