public void Acceptance()
        {
            var trip = new TripSorter(new[] { new TripLeg("Мельбурн", "Кельн"), new TripLeg("Москва", "Париж"), new TripLeg("Кельн", "Москва") }).Sort();

            Assert.That(trip.Select(l => l.Begin), Is.EqualTo(new[] { "Мельбурн", "Кельн", "Москва" }));
            Assert.That(trip.Select(l => l.End), Is.EqualTo(new[] { "Кельн", "Москва", "Париж" }));
        }
        public void ThreeLegsInReverseOrder()
        {
            var trip = new TripSorter(new[] { new TripLeg("B", "D"), new TripLeg("C", "B"), new TripLeg("A", "C") }).Sort();

            Assert.That(trip.Select(l => l.Begin), Is.EqualTo(new[] { "A", "C", "B" }));
        }
        public void TwoLegs()
        {
            var trip = new TripSorter(new[] { new TripLeg("A", "C"), new TripLeg("C", "B") }).Sort();

            Assert.That(trip.Select(l => l.Begin), Is.EqualTo(new[] { "A", "C" }));
        }