public void Pop_on_empty_Stack_throws_Exception()
{
var s = new CountableStack <string>(2);
s.Put("s1");
s.Put("s2");
s.Pop();
s.Pop();
try
{
s.Pop();
// se non lancia eccezione,
// il test deve fallire!
Assert.Fail("Did not throw Exception");
}
catch (InvalidOperationException ex)
{
// se viene catturata una InvalidOperationException
// è tutto a posto
}
catch (Exception)
{
// se viene lanciata qualche altra eccezione
// il test deve fallire!
Assert.Fail("Threw wrong Exception");
}
}
public void Pop_returns_the_elements_in_reverse_order()
{
var s = new CountableStack <string>(2);
s.Put("s1");
s.Put("s2");
Assert.AreEqual("s2", s.Pop());
Assert.AreEqual("s1", s.Pop());
}
public void An_unsubscribed_does_not_receive_the_Pop_element()
{
var s = new CountableStack <int>(3);
var sub1 = new StackSubscriber <int>();
var sub2 = new StackSubscriber <int>();
s.Subscribe(sub1);
s.Subscribe(sub2);
s.Put(40);
s.Put(41);
s.Pop();
s.Unsubscribe(sub1);
s.Pop();
Assert.AreEqual(41, sub1.LastPop);
Assert.AreEqual(40, sub2.LastPop);
}
public void Stack_emptied_cannot_Pop()
{
var s = new CountableStack <int>(2);
s.Put(5);
s.Pop();
Assert.IsFalse(s.CanPop());
}
public void new_Stack_can_Pop_down_to_empty()
{
var s = new CountableStack <int>(3);
s.Put(100);
s.Put(150);
s.Put(200);
Assert.IsTrue(s.CanPop());
s.Pop();
Assert.IsTrue(s.CanPop());
s.Pop();
Assert.IsTrue(s.CanPop());
s.Pop();
Assert.IsFalse(s.CanPop());
}
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));
}