def test_stack_is_empty(test_stack):
    embty_stack = Stack()
    assert embty_stack.isEmpty() == True
    assert test_stack.isEmpty() == False
def test_is_empty():
    s = Stack()
    actual = s.isEmpty()
    expected = True
    assert actual == expected
def test_queue_is_empty(test_queue):
    assert test_queue.isEmpty() == False
    test_queue = Stack()
    assert test_queue.isEmpty() == True