import Stack from "@code/Stack";

test("queue", function() {
    const list = new Stack<number>();

    list.push(5);
    list.push(7);
    list.push(9);

    expect(list.pop()).toEqual(9);
    expect(list.length).toEqual(2);

    list.push(11);
    expect(list.pop()).toEqual(11);
    expect(list.pop()).toEqual(7);
    expect(list.peek()).toEqual(5);
    expect(list.pop()).toEqual(5);
    expect(list.pop()).toEqual(undefined);
});