public void GetRates_ReturnFalseIfInvalidUrl()
        {
            //Arrange
            bool            expected = false;
            bool            actual;
            RatesWebService ratesWebService = new RatesWebService();

            //Act
            actual = ratesWebService.GetRates("invalidUrl").isValid;

            //Assert
            Assert.AreEqual(expected, actual);
        }
        public void GetRates_ReturnTrueIfValidUrl()
        {
            //Arrange
            bool            expected = true;
            bool            actual;
            RatesWebService ratesWebService = new RatesWebService();

            //Act
            actual = ratesWebService.GetRates().isValid;

            //Assert
            Assert.AreEqual(expected, actual);
        }