public void IteratorShouldPrintTheCorrectElement()
{
ListIterator iterator = new ListIterator("a", "b");
FieldInfo lastPrintedField = iterator.GetType().GetField("lastPrinted", BindingFlags.NonPublic | BindingFlags.Instance);
iterator.Print();
string comparator = (string)lastPrintedField.GetValue(iterator);
Assert.That("a".Equals(comparator));
iterator.Move();
iterator.Print();
comparator = (string)lastPrintedField.GetValue(iterator);
Assert.That("b".Equals(comparator));
}
public void CallingPrintOnEmptyCollectionShouldThrowException()
{
ListIterator iterator = new ListIterator();
Exception ex = Assert.Throws <InvalidOperationException>(() => iterator.Print());
Assert.That(ex.Message == "Invalid Operation!");
}
public static void Main()
{
IListIterator list = null;
var input = string.Empty;
while ((input = Console.ReadLine()) != "END")
{
try
{
var tokens = input.Split();
switch (tokens[0])
{
case "Create":
var collection = new List <string>(tokens.Skip(1));
list = new ListIterator(collection);
break;
case "Move":
Console.WriteLine(list.Move());
break;
case "HasNext":
Console.WriteLine(list.HasNext());
break;
case "Print":
Console.WriteLine(list.Print());
break;
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}