old_contents: import random
  import unittest
  
  from aioes.pool import RandomSelector, RoundRobinSelector
  
  
  class TestRandomSelector(unittest.TestCase):
  
      def setUp(self):
          random.seed(123456)
  
      def tearDown(self):
          random.seed(None)
  
      def test_select(self):
          s = RandomSelector()
          r = s.select([1, 2, 3])
          self.assertEqual(2, r)
  
  
  class TestRoundRobinSelector(unittest.TestCase):
  
      def test_select(self):
          s = RoundRobinSelector()
          r = s.select([1, 2, 3])
          self.assertEqual(2, r)
          r = s.select([1, 2, 3])
          self.assertEqual(3, r)
          r = s.select([1, 2, 3])
          self.assertEqual(1, r)
          r = s.select([1, 2, 3])
          self.assertEqual(2, r)
  
new_contents: import asyncio
  import random
  import unittest
  
  from aioes.pool import RandomSelector, RoundRobinSelector, ConnectionPool
  from aioes.transport import Endpoint
  from aioes.connection import Connection
  
  
  class TestRandomSelector(unittest.TestCase):
  
      def setUp(self):
          random.seed(123456)
  
      def tearDown(self):
          random.seed(None)
  
      def test_select(self):
          s = RandomSelector()
          r = s.select([1, 2, 3])
          self.assertEqual(2, r)
  
  
  class TestRoundRobinSelector(unittest.TestCase):
  
      def test_select(self):
          s = RoundRobinSelector()
          r = s.select([1, 2, 3])
          self.assertEqual(2, r)
          r = s.select([1, 2, 3])
          self.assertEqual(3, r)
          r = s.select([1, 2, 3])
          self.assertEqual(1, r)
          r = s.select([1, 2, 3])
          self.assertEqual(2, r)
  
  
  class TestConnectionPool(unittest.TestCase):
  
      def setUp(self):
          self.loop = asyncio.new_event_loop()
          asyncio.set_event_loop(None)
  
      def tearDown(self):
          self.loop.close()
  
      def make_pool(self):
          conn = Connection(Endpoint('localhost', 9200), loop=self.loop)
          pool = ConnectionPool([conn], loop=self.loop)
          self.addCleanup(pool.close)
          return pool
  
      def test_ctor(self):
          pool = self.make_pool()
          self.assertAlmostEqual(60, pool.dead_timeout)
          self.assertAlmostEqual(5, pool.timeout_cutoff)
  
subject: Add more tests for pool