def test_queue_is_empty(self):
que = Queue()
random_values = get_random_values()
self.assertEqual(que.is_empty(), True)
for v in random_values:
que.push(v)
self.assertEqual(que.is_empty(), False)
for v in random_values:
self.assertEqual(que.is_empty(), False)
que.pop()
self.assertEqual(que.is_empty(), True)
def test_dequeue_different_sizes(self, lst: list) -> None:
"""
Tests the Queue.dequeue method on queues with different amounts of items.
"""
q = Queue(lst)
while not q.is_empty():
self.assertEqual(lst.pop(0), q.dequeue())
def test_queue_push(self):
que = Queue()
random_values = get_random_values()
for v in random_values:
que.push(v)
self.assertEqual(que.is_empty(), False)
self.assertEqual(que.peek(), v)
self.assertEqual(que.pop(), v)
def test_queue_init(self):
que = Queue()
self.assertEqual(que.size(), 0)
self.assertEqual(que.is_empty(), True)
with self.assertRaises(IndexError):
que.pop()
with self.assertRaises(IndexError):
que.peek()
class TestQueue(unittest.TestCase):
def setUp(self):
# Create queues for the tests to use
self.new = Queue()
self.empty = Queue()
self.empty.enqueue('hi')
self.empty.dequeue()
# Don't add in ascending or descending order
self.non_empty = Queue()
self.non_empty.enqueue(5)
self.non_empty.enqueue(2)
self.non_empty.enqueue(7)
self.non_empty.enqueue(2)
def test_length(self):
self.assertEqual(len(self.new), 0)
self.assertEqual(len(self.empty), 0)
self.assertEqual(len(self.non_empty), 4)
def test_is_empty(self):
self.assertTrue(self.new.is_empty())
self.assertTrue(self.empty.is_empty())
self.assertFalse(self.non_empty.is_empty())
def test_fifo_order(self):
self.assertEqual(self.non_empty.dequeue(), 5)
self.assertEqual(self.non_empty.dequeue(), 2)
self.assertEqual(self.non_empty.dequeue(), 7)
self.assertEqual(self.non_empty.dequeue(), 2)
def test_access_to_empty(self):
with self.assertRaises(AssertionError):
self.new.front()
with self.assertRaises(AssertionError):
self.empty.front()
with self.assertRaises(AssertionError):
self.new.dequeue()
with self.assertRaises(AssertionError):
self.empty.dequeue()
def test_membership(self):
self.assertFalse(2 in self.new)
self.assertFalse(2 in self.empty)
self.assertTrue(2 in self.non_empty)
self.assertTrue(5 in self.non_empty)
self.assertTrue(7 in self.non_empty)
def test_queue_pop(self):
que = Queue()
random_values = get_random_values()
for v in random_values:
que.push(v)
for v in random_values:
que.pop()
self.assertEqual(que.is_empty(), True)
with self.assertRaises(IndexError):
que.pop()
with self.assertRaises(IndexError):
que.peek()
