public void should_return_false_when_trypop_from_empty()
{
IStack <int> stack = new Services.Stack <int>();
int result;
stack.TryPop(out result).Should().BeFalse();
}
public void should_return_true_when_trypop_after_push()
{
IStack <int> stack = new Services.Stack <int>();
stack.Push(123);
int popped;
bool result = stack.TryPop(out popped);
result.Should().BeTrue();
popped.Should().Be(123);
}
public void should_still_contain_items_after_trypop()
{
IStack <int> stack = new Services.Stack <int>();
stack.Push(321);
int popped;
stack.TryPop(out popped);
Action act = () => stack.Pop();
act.Should().NotThrow();
}