public void GetTopDonations_ShouldReturnAnEmptyListOfDonations_WhenThereAreNoDonations()
{
var donationsRepository = Substitute.For <IDonationRepository>();
donationsRepository.GetAll().Returns(Enumerable.Empty <Donation>());
var donationsService = new DonationsService(donationsRepository);
IEnumerable <Donation> topDonations = donationsService.GetTopDonations(1);
CollectionAssert.AreEqual(Enumerable.Empty <Donation>(), topDonations);
}
public void GetTopDonations_ShouldReturnAListOfDonations_InDescendingOrderByAmount_WhenThereAreDonations()
{
var smallDonation = new Donation { Amount = 10m };
var largeDonation = new Donation { Amount = 100m };
var donations = new[] { smallDonation, largeDonation };
var donationsRepository = Substitute.For<IDonationRepository>();
donationsRepository.GetAll().Returns(donations);
var donationsService = new DonationsService(donationsRepository);
IEnumerable<Donation> topDonations = donationsService.GetTopDonations(5);
CollectionAssert.AreEqual(new[] { largeDonation, smallDonation }, topDonations);
}
public void GetTopDonations_ShouldReturnTheSpecifiedNumberOfDonations_WhenThereAreDonations()
{
var smallDonation = new Donation {
Amount = 10m
};
var largeDonation = new Donation {
Amount = 100m
};
var donations = new[] { smallDonation, largeDonation };
var donationsRepository = Substitute.For <IDonationRepository>();
donationsRepository.GetAll().Returns(donations);
var donationsService = new DonationsService(donationsRepository);
IEnumerable <Donation> topDonations = donationsService.GetTopDonations(1);
CollectionAssert.AreEqual(new[] { largeDonation }, topDonations);
}
public void GetTopDonations_ShouldReturnAnEmptyListOfDonations_WhenThereAreNoDonations()
{
var donationsRepository = Substitute.For<IDonationRepository>();
donationsRepository.GetAll().Returns(Enumerable.Empty<Donation>());
var donationsService = new DonationsService(donationsRepository);
IEnumerable<Donation> topDonations = donationsService.GetTopDonations(1);
CollectionAssert.AreEqual(Enumerable.Empty<Donation>(), topDonations);
}