public void FilterComesFrom()
{
var source = ComesFromSource;
var filter = Factory.ArrivalsComeFrom(TestStations.ClaphamJunction);
var results = filter(source).ToArray();
Assert.Contains(source[0], results);
Assert.DoesNotContain(source[1], results);
Assert.Contains(source[3], results);
Assert.Equal(2, results.Count());
}