public void FixedCapacityStackOfStrings_PushAndPopString_SameString()
{
IFixedCapacityStringStack stack = new FixedCapacityCapacityStackOfStrings(1);
stack.push("to");
var res = stack.pop();
Assert.AreEqual("to", res);
}
//[ExpectedException(typeof(IndexOutOfRangeException))]
public void FixedCapacityStackOfStrings_AddMoreThanCapacity_ResultsOverflow()
{
IFixedCapacityStringStack stack = new FixedCapacityCapacityStackOfStrings(1);
stack.push("readyToOverflow");
Assert.That(() => stack.push("overflow"),
Throws.TypeOf <IndexOutOfRangeException>());
}