def test_add_rear(self):
"""Test add rear method."""
d = Dequeue()
self.assertTrue(d._items == [])
d.add_rear(1)
d.add_rear(2)
self.assertEqual(d._items, [1, 2])
def test_size(self):
"""Test size method."""
d = Dequeue()
self.assertEqual(d.size(), 0)
n = 10
for number in range(1, n):
d.add_rear(1)
self.assertEqual(d.size(), number)
def PalindromeDetector(string):
dq = Dequeue()
for letter in string:
dq.add_rear(letter)
while dq.size() > 1:
if dq.remove_front() != dq.remove_rear():
return False
return True
def palindrome_checker(word):
"""Return True if word reads the same forward and backward."""
d = Dequeue()
for character in word:
d.add_rear(character)
backwards = "".join([d.remove_rear() for character in word])
if word == backwards:
return True
return False
def test_remove_front(self):
"""Test remove front method."""
d = Dequeue()
d.add_rear(1)
d.add_rear(2)
d.add_rear(3)
self.assertEqual(d._items, [1, 2, 3])
front = d.remove_front()
self.assertEqual(front, 1)
self.assertEqual(d._items, [2, 3])
def test_remove_rear(self):
"""Test remove rear method."""
d = Dequeue()
d.add_rear(1)
d.add_rear(2)
d.add_rear(3)
self.assertEqual(d._items, [1, 2, 3])
rear = d.remove_rear()
self.assertEqual(rear, 3)
self.assertEqual(d._items, [1, 2])
def pal_checker(word):
chardequeue = Dequeue()
for char in word:
chardequeue.add_rear(char)
still_equal = True
while chardequeue.size() > 1 and still_equal:
first = chardequeue.remove_front()
last = chardequeue.remove_rear()
if first != last:
still_equal = False
return still_equal
def test_add_rear(self):
d = Dequeue()
self.assertEqual(d.items, [])
d.add_rear("apple")
d.add_rear("banana")
self.assertEqual(d.items, ["apple", "banana"])