public async Task repository_fetch_method_should_be_called_1_time()
{
// Arr
var interestRateRepository = Substitute.For <IInterestRateRepository>();
interestRateRepository.FetchCurrentInterestRate().Returns(Task.Run(() => new InterestRate(0.01m)));
var compoundInterestService = new CompoundInterestService(interestRateRepository);
// Act
var finalAmount = await compoundInterestService.CalcAmount(100, 5);
// Ass
await interestRateRepository.Received(1).FetchCurrentInterestRate();
}
public async Task should_calc_amount_correctly()
{
// Arr
var interestRateRepository = Substitute.For <IInterestRateRepository>();
interestRateRepository.FetchCurrentInterestRate().Returns(Task.Run(() => new InterestRate(0.01m)));
var compoundInterestService = new CompoundInterestService(interestRateRepository);
// Act
var finalAmount = await compoundInterestService.CalcAmount(100, 5);
// Ass
finalAmount.Value.Should().Be(105.1M);
}
