  from nose.tools import assert_equal
  
  
  class TestPriorityQueue(object):
  
      def test_priority_queue(self):
          priority_queue = PriorityQueue()
          assert_equal(priority_queue.extract_min(), None)
          priority_queue.insert(PriorityQueueNode('a', 20))
 
</s> remove         assert_equal(priority_queue.extract_min(), None)
 </s> add         self.assertEqual(priority_queue.extract_min(), None) </s> remove from nose.tools import assert_equal
 </s> add import unittest </s> remove class TestReverse(object):
 </s> add class TestReverse(unittest.TestCase): </s> remove class TestCompress(object):
 </s> add class TestCompress(unittest.TestCase): </s> remove class TestCompress(object):
 </s> add class TestCompress(unittest.TestCase):
class TestPriorityQueue(unittest.TestCase):
  from nose.tools import assert_equal
  
  
class TestPriorityQueue(unittest.TestCase):
  
      def test_priority_queue(self):
          priority_queue = PriorityQueue()
          assert_equal(priority_queue.extract_min(), None)
          priority_queue.insert(PriorityQueueNode('a', 20))
keep keep keep replace keep keep keep keep keep
 #273: Remove nose dependency for arrays_strings/ (#274) 
arrays_strings/priority_queue/test_priority_queue.py