public async Task WhenRateIsTwoAndPriceIsOne_PriceIsMultipliedByRateTwo_ReturnsNewPriceTwo()
{
//arrange
var testPrice = 1;
_rateRetrieverMock.Setup(rateRetriever => rateRetriever.Rate("GBP", "USD")).ReturnsAsync(2);
var currencyConverter = new CurrencyConverter(_rateRetrieverMock.Object);
//act
var convertedPrice = await currencyConverter.ConvertedPrice(testPrice, "GBP", "USD");
//assert
Assert.AreEqual(2, convertedPrice);
}
public async Task WhenRateIsTwopPointFourAndPriceIsOnePointFiveOne_PriceIsMultipliedByRateTwo_ReturnsNewPriceTwo()
{
//arrange
var testPrice = (decimal)1.51;
_rateRetrieverMock.Setup(rateRetriever => rateRetriever.Rate("GBP", "USD")).ReturnsAsync((decimal)2.4);
var currencyConverter = new CurrencyConverter(_rateRetrieverMock.Object);
//act
var convertedPrice = await currencyConverter.ConvertedPrice(testPrice, "GBP", "USD");
//assert
Assert.AreEqual(3.624, convertedPrice);
}
public async Task WhenRateIsOne_PriceIsUnchanged_ReturnsSubmittedPriceValue()
{
//arrange
var testPrice = 1;
_rateRetrieverMock.Setup(rateRetriever => rateRetriever.Rate("GBP", "GBP")).ReturnsAsync((decimal)1);
var currencyConverter = new CurrencyConverter(_rateRetrieverMock.Object);
//act
var convertedPrice = await currencyConverter.ConvertedPrice(testPrice, "GBP", "GBP");
//assert
Assert.AreEqual(testPrice, convertedPrice);
}