func TestRemoveDuplicates(t *testing.T) {
l := datastructures.LinkedList{}
for i := 0; i <= 10; i++ {
n := &datastructures.Node{}
n.SetValue(i % 3)
l.Add(n)
}
RemoveDuplicates(&l)
if l.Len() != 3 {
t.Error("Wrong length, Len() must be", 3)
}
if l.Find(0) == nil || l.Find(1) == nil || l.Find(2) == nil {
t.Error("Wrong deletion for one of the elements.")
}
}
