static int?Part2(HashSet <int> input)
{
var triple = PairsFinder.FindTriple(2020, input);
return(triple == null
? (int?)null
: triple.Value.Item1 *triple.Value.Item2 *triple.Value.Item3);
}
static int?Part1(HashSet <int> input)
{
var pair = PairsFinder.FindPair(2020, input);
return(pair == null
? (int?)null
: pair.Value.Item1 *pair.Value.Item2);
}
public void Returns_Empty_Results_When_Given_Empty_List()
{
var persons = new List <Person>();
var pairsFinder = new PairsFinder(persons);
var result = pairsFinder.FindBy(PairingCriteria.ClosestByAge);
Assert.Null(result.Person1);
Assert.Null(result.Person2);
}
public void Returns_Closest_Two_For_Four_People()
{
var persons = new List <Person> {
Greg, Mike, Sarah, Sue
};
var pairsFinder = new PairsFinder(persons);
var result = pairsFinder.FindBy(PairingCriteria.ClosestByAge);
Assert.Same(Sue, result.Person1);
Assert.Same(Greg, result.Person2);
}
public void Returns_Furthest_Two_For_Two_People()
{
var persons = new List <Person> {
Greg, Mike
};
var pairsFinder = new PairsFinder(persons);
var result = pairsFinder.FindBy(PairingCriteria.FurthestByAge);
Assert.Same(Greg, result.Person1);
Assert.Same(Mike, result.Person2);
}
public void Returns_Furthest_Two_For_Four_People()
{
var persons = new List <Person> {
Greg, Mike, Sarah, Sue
};
var pairsFinder = new PairsFinder(persons);
var result = pairsFinder.FindBy(PairingCriteria.FurthestByAge);
Assert.Same(Sue, result.YoungerPerson);
Assert.Same(Sarah, result.OlderPerson);
}
public void Returns_Closest_Two_For_Two_People()
{
var persons = new List <Person> {
Sue, Greg
};
var pairsFinder = new PairsFinder(persons);
var result = pairsFinder.FindBy(PairingCriteria.ClosestByAge);
Assert.Same(Sue, result.YoungerPerson);
Assert.Same(Greg, result.OlderPerson);
}
public void Returns_Empty_Results_When_Given_One_Person()
{
var persons = new List <Person> {
Sue
};
var pairsFinder = new PairsFinder(persons);
var result = pairsFinder.FindBy(PairingCriteria.ClosestByAge);
Assert.Null(result.YoungerPerson);
Assert.Null(result.OlderPerson);
}