public SecretSantaPairer(List <Person> people)
{
int noMatchCounter = 0;
SecretSantaPair pair2 = null;
Person temp;
Func <SecretSantaPair, bool> ValidFunction = null;
List = people.CreatePairs();
do
{
foreach (var pair in List.Where(p => !p.IsValid))
{
if (ValidFunction == null)
{
ValidFunction = p => SecretSantaPair.WouldBeValid(pair.Giver, p.Receiver) &&
SecretSantaPair.WouldBeValid(p.Giver, pair.Receiver);
}
pair2 = List.Where(p => !p.IsValid).FirstOrDefault(ValidFunction)
?? List.FirstOrDefault(ValidFunction);
if (pair2 != null)
{
temp = pair.Receiver;
pair.Receiver = pair2.Receiver;
pair2.Receiver = temp;
}
else
{
noMatchCounter++;
}
}
} while ((List.Where(p => !p.IsValid).Count() > 0) && (noMatchCounter < 3));
}
public void ValidPair()
{
Person person1 = new Person("Curtis Thibault", "Email");
Person person2 = new Person("Jake Gamble", "Email");
SecretSantaPair pair = new SecretSantaPair(person1, person2);
Assert.True(pair.IsValid);
}
public void Receiver()
{
Person person1 = new Person("One Last", "Email");
Person person2 = new Person("Two Last", "Email");
SecretSantaPair pair = new SecretSantaPair(person1, person2);
Assert.AreEqual(person2, pair.Receiver);
}
public void InvalidPair_SamePerson()
{
Person person1 = new Person("First Person", "Email");
Person person2 = new Person("First Person", "Email");
SecretSantaPair pair = new SecretSantaPair(person1, person2);
Assert.False(pair.IsValid);
}