Restaurant Reservations

reservations.cs

public void TryAcceptReturnsReservationIdInHappyPathScenario(
  [Frozen]Mock<IReservationsRepository> td,
  Reservation reservation,
  IReadOnlyCollection<Reservation> reservations,
  MaîtreD sut,
  int excessCapacity,
  int expected)
{
  // i think td refers to test-double 
  // ReservationsRepository is mocked 
  td.Setup(r => r.IsReservationInFuture(reservation)).Returns(true);
  td
      .Setup(r => r.ReadReservations(reservation.Date))
      .Returns(reservations);
  td.Setup(r => r.Create(reservation)).Returns(expected);
  
  var reservedSeats = reservations.Sum(r => r.Quantity);
  reservation.IsAccepted = false;
  sut = sut.WithCapacity(
      reservedSeats + reservation.Quantity + excessCapacity);

  var actual = sut.TryAccept(reservation);

  Assert.Equal(expected, actual);
  Assert.True(reservation.IsAccepted);
}