def test_remove_rear(self):
d = Dequeue()
d.add_front("apple")
d.add_front("banana")
d.add_front("cherry")
self.assertEqual(d.remove_rear(), "apple")
self.assertEqual(d.items, ["cherry", "banana"])
def test_add_front(self):
"""Test add front method."""
d = Dequeue()
self.assertTrue(d._items == [])
d.add_front(1)
d.add_front(2)
self.assertEqual(d._items, [2, 1])
def test_size(self):
d = Dequeue()
self.assertEqual(d.size(), 0)
d.add_front("apple")
self.assertEqual(d.size(), 1)
d.add_front("banana")
self.assertEqual(d.size(), 2)
d.add_front("cherry")
self.assertEqual(d.size(), 3)
def test_is_empty(self):
"""Test is empty method."""
d = Dequeue()
self.assertTrue(d.is_empty())
d.add_front(1)
self.assertFalse(d.is_empty())
def create_dequeue(self, string):
dequeue= Dequeue()
for char in string:
if not char.isspace() and char.isalnum():
dequeue.add_front(char)
return dequeue
def test_is_empty(self):
d = Dequeue()
self.assertEqual(d.is_empty(), True)
d.add_front("apple")
self.assertEqual(d.is_empty(), False)
def test_add_front(self):
d = Dequeue()
self.assertEqual(d.items, [])
d.add_front("apple")
d.add_front("banana")
self.assertEqual(d.items, ["banana", "apple"])