public void Full_Stack_Count_with_no_valid_elements_returns_0()
{
var s = new CountableStack <string>(10);
s.Put("aa");
s.Put("z");
Assert.AreEqual(0, s.Count(x => x == null));
Assert.AreEqual(0, s.Count(x => x.StartsWith("c")));
Assert.AreEqual(0, s.Count(x => x.Length > 3));
}
public void Full_Stack_Count_returns_correct_number_of_elements()
{
var s = new CountableStack <string>(10);
s.Put(null);
s.Put("ciao");
s.Put("mondo");
s.Put("another string");
Assert.AreEqual(1, s.Count(x => x == null));
// Short Circuit conditions:
// && restituisce false alla prima condizione falsa,
// NON controlla tutte le condizioni.
Assert.AreEqual(1, s.Count(x => x != null && x.StartsWith("c")));
Assert.AreEqual(3, s.Count(x => x != null && x.Length > 3));
}
public void Empty_Stack_returns_0()
{
var s = new CountableStack <string>(0);
Assert.AreEqual(0, s.Count(x => x == null));
Assert.AreEqual(0, s.Count(x => x.StartsWith("c")));
Assert.AreEqual(0, s.Count(x => x.Length > 3));
s = new CountableStack <string>(10);
Assert.AreEqual(0, s.Count(x => x == null));
Assert.AreEqual(0, s.Count(x => x.StartsWith("c")));
Assert.AreEqual(0, s.Count(x => x.Length > 3));
s = new CountableStack <string>(20);
s.Put("cc");
s.Put("heeeeey");
s.Pop();
s.Pop();
Assert.AreEqual(0, s.Count(x => x == null));
Assert.AreEqual(0, s.Count(x => x.StartsWith("c")));
Assert.AreEqual(0, s.Count(x => x.Length > 3));
}