new_contents: import unittest
  
  from mock import Mock, patch
  
  
  from collectd_haproxy import compat
  
  
  class CompatTests(unittest.TestCase):
  
      @patch.object(compat, "PY3", False)
      def test_iteritems_python2_uses_iteritems(self):
          dictionary = Mock()
  
          self.assertEqual(
              compat.iteritems(dictionary),
              dictionary.iteritems.return_value
          )
  
      @patch.object(compat, "PY3", True)
      def test_iteritems_python3_uses_items(self):
          dictionary = Mock()
  
          self.assertEqual(
              compat.iteritems(dictionary),
              dictionary.items.return_value
          )
  
      @patch.object(compat, "PY3", True)
      def test_coerce_long_python3_uses_int(self):
          self.assertEqual(compat.coerce_long("123"), int("123"))
  
subject: Add tests for the compat module.