def test_peek_when_empty(): # TODO it should raise an exception when peeking an empty queue q = Queue() with pytest.raises(InvalidOperationError) as e: q.peek() assert str(e.value) == "Method not allowed on empty collection" pass
def test_enqueue_two(): q = Queue() q.enqueue("apples") q.enqueue("bananas") actual = q.peek() expected = "apples" assert actual == expected
def test_peek(): q = Queue() q.enqueue("apple") q.enqueue("banana") q.enqueue("cucumber") actual = q.peek() expected = "apple" assert actual == expected
def test_peek_post_dequeue(): # TODO it should return a new first value if peek is called after a dequeue q = Queue() q.enqueue("apples") q.enqueue("bananas") q.enqueue("grapes") q.dequeue() actual = q.peek() expected = "bananas" assert actual == expected
def test_peek(queue_vals): q = Queue() assert q.peek() == 'this is an empty Stack' assert queue_vals.peek() == 8