old_contents: from hashring import HashRing
  
  def test_basic_ring():
      hr = HashRing(range(3))
      actual = hr.get_node('howdy')
      expected = 1
      assert expected == actual
  
new_contents: from hashring import HashRing
  
  def test_basic_ring():
      hr = HashRing(range(3))
      actual = hr.get_node('howdy')
      expected = 1
      assert expected == actual
  
  
  def test_server_ring():
      memcache_servers = ['192.168.0.246:11212',
                          '192.168.0.247:11212',
                          '192.168.0.249:11212']
  
      ring = HashRing(memcache_servers)
      actual = ring.get_node('my_key')
      expected = '192.168.0.247:11212'
      assert expected == actual
  
subject: Add additional test for strings