public void Returns_Empty_Results_When_Given_One_Person()
{
var list = new List<Person>() { sue };
var finder = new Finder(list);
var result = finder.FindBornClosest();
Assert.Null(result.Younger);
Assert.Null(result.Older);
}
public void Returns_Closest_Two_For_Two_People()
{
var list = new List<Person>() { sue, greg };
var finder = new Finder(list);
var result = finder.FindBornClosest();
Assert.Same(sue, result.Younger);
Assert.Same(greg, result.Older);
}