def test_roll_works(self):
push(42)
push(40)
push(38)
roll(2, 1)
self.assertEqual(40, pop())
self.assertEqual(38, pop())
self.assertEqual(42, pop())
self.assertRaises(IndexError, pop)
def test_roll_works(self):
push(42)
push(40)
push(38)
roll(2, 1)
self.assertEqual(40, pop())
self.assertEqual(38, pop())
self.assertEqual(42, pop())
self.assertRaises(IndexError, pop)
def test_roll_works_for_larger_stacks(self):
for i in range(10):
push(i)
roll(5, 3)
self.assertEqual(6, pop())
def test_roll_works_for_larger_stacks(self):
for i in range(10):
push(i)
roll(5, 3)
self.assertEqual(6, pop())
