public void TestPush()
{
stack s = new stack(10);
s.push(3);
s.push(5);
s.push(7);
Assert.AreEqual(3, s.count());
}
public void TestClear()
{
stack s = new stack(10);
s.push(3);
s.push(5);
s.push(7);
s.clear();
Assert.AreEqual(0, s.count());
}