public async Task Exchange_When_ExpectedDkk()
{
// Arrange
var sut = new ExchangeService(_currencyRatesRepositoryTestDouble.Object);
const double expected = 1000.01;
// Act
var actual = await sut.Exchange(133.98, "eur", "dkk");
// Assert
Assert.AreEqual(expected, actual.Amount);
}
public void Exchange_currency_then_return_assign_currency_and_correct_amount()
{
//Given
IExchangeService exchange = new ExchangeService();
var tenFranc = FakeDataBuilder.MakeFranc(10);
exchange.AddRate("CHF", "USD", 2);
//When
ICurrencyExpression result = exchange.Exchange(tenFranc, "USD");
//Then
Assert.Equal(FakeDataBuilder.MakeDollar(5), result);
}
public void Not_setting_Rate_Then_Exchange_then_throw_exception()
{
//Given
IExchangeService exchange = new ExchangeService();
var tenFranc = FakeDataBuilder.MakeFranc(10);
//When
ArgumentNullException exception =
Assert.Throws <ArgumentNullException>(() =>
exchange.Exchange(tenFranc, "USD"));
//Then
Assert.Contains("Before Exchange must be setting Exchange rates", exception.Message);
}
public void Invalid_params_to_Exchange_then_throw_exception()
{
//Given
IExchangeService exchange = new ExchangeService();
//When
ArgumentNullException exception =
Assert.Throws <ArgumentNullException>(() =>
exchange.Exchange(FakeDataBuilder.MakeDollar(1), null));
//Then
Assert.Contains("Exchange must assign Currency", exception.Message);
ArgumentNullException sourceException = Assert
.Throws <ArgumentNullException>(() => exchange.Exchange(null, "USD"));
Assert.Contains("Exchange must be have Money", sourceException.Message);
}