public void HeadTest()
{
const string data = "How now, brown cow?";
var list = data.Split().Aggregate(SkewBinaryRandomAccessList <string> .Empty, (current, word) => SkewBinaryRandomAccessList <string> .Cons(word, current));
Assert.AreEqual("cow?", SkewBinaryRandomAccessList <string> .Head(list));
list = SkewBinaryRandomAccessList <string> .Update(0, "dog?", list);
Assert.AreEqual("dog?", SkewBinaryRandomAccessList <string> .Head(list));
}
public void EmptyHeadTest()
{
var list = SkewBinaryRandomAccessList <string> .Empty;
AssertThrows <ArgumentNullException>(() => SkewBinaryRandomAccessList <string> .Head(list));
}