public void And_ParametersOK_Then_AssigSeat_ReturnTrue() { //ARRANGE var aircraft = AircraftScenarioFactory.GetMockedAircraftWithAvailableSeats(flightNumber, departureDate); _IAircraftRecoverAndPersistMocked.Expects.One.Method(x => x.GetAircraftFromRepository(aircraft)).WithAnyArguments().WillReturn(aircraft); //ACTION bool actual = Sut.Unassign(aircraft, seatToUnAssign); //ASSERT Assert.IsTrue(actual, "No se esparaba error al desasignar un asiento cuando los parametros de entrada son correctos."); }