def test_Queue_enqueue_multiple_items():
my_queue = Queue()
my_queue.enqueue(1)
my_queue.enqueue(2)
my_queue.enqueue(3)
actual = my_queue.peek()
expected = 1
assert actual == expected
def test_Queue_peek_front():
my_queue = Queue()
my_queue.enqueue(1)
my_queue.enqueue(2)
my_queue.enqueue(3)
actual = my_queue.peek()
expected = 1
assert actual == expected
def test_Queue_peek_empty_Exception():
with pytest.raises(AttributeError):
my_queue = Queue()
actual = my_queue.peek()
expected = "Can't peek front from an empty queue"
assert actual == expected
def test_Queue_enqueue_one_item():
my_queue = Queue()
my_queue.enqueue(1)
actual = my_queue.peek()
expected = 1
assert actual == expected