      # method in addition to the following end-to-end test
      def test_end_to_end(self):
          print('Test: Empty stack')
          stack = Stack()
          assert_equal(stack.peek(), None)
          assert_equal(stack.pop(), None)
  
          print('Test: One element')
          top = Node(5)
          stack = Stack(top)
          assert_equal(stack.pop(), 5)
 
</s> remove         assert_equal(stack.pop(), 5)
        assert_equal(stack.peek(), None)
 </s> add         self.assertEqual(stack.pop(), 5)
        self.assertEqual(stack.peek(), None) </s> remove         assert_equal(queue.dequeue(), None)
 </s> add         self.assertEqual(queue.dequeue(), None) </s> remove     "        assert_equal(stack.peek(), None)\n",
    "        assert_equal(stack.pop(), None)\n",
 </s> add     "        self.assertEqual(stack.peek(), None)\n",
    "        self.assertEqual(stack.pop(), None)\n", </s> remove     "        assert_equal(stack.peek(), None)\n",
    "        assert_equal(stack.pop(), None)\n",
 </s> add     "        self.assertEqual(stack.peek(), None)\n",
    "        self.assertEqual(stack.pop(), None)\n", </s> remove class TestStack(object):
 </s> add class TestStack(unittest.TestCase):
        self.assertEqual(stack.peek(), None)
        self.assertEqual(stack.pop(), None)
      # method in addition to the following end-to-end test
      def test_end_to_end(self):
          print('Test: Empty stack')
          stack = Stack()
        self.assertEqual(stack.peek(), None)
        self.assertEqual(stack.pop(), None)
        self.assertEqual(stack.peek(), None)
        self.assertEqual(stack.pop(), None)
  
          print('Test: One element')
          top = Node(5)
          stack = Stack(top)
          assert_equal(stack.pop(), 5)
keep keep keep keep replace replace keep keep keep keep keep
 #273: Remove nose dependency for stacks_queues/ (#276) 
stacks_queues/stack/test_stack.py