def test_peek_back_when_items_returns_expected_front_of_queue(self): # Arrange queue = Queue() queue.put_nowait("A") queue.put_nowait("B") queue.put_nowait("C") # Act, Assert assert queue.peek_back() == "C"
def test_peek_when_no_items_returns_none(self): # Arrange queue = Queue() # Act, Assert assert queue.peek_back() is None