new_contents: import unittest
  from performance.web import RequestData, Request
  
  
  class RequestDataTestCase(unittest.TestCase):
      def setUp(self):
          self.host = 'http://www.google.com'
  
      def test_init(self):
          request_data = RequestData()
          self.assertIsNone(request_data.data)
          request_data = RequestData(data={})
          self.assertDictEqual({}, request_data.data)
  
      def test_get_converted(self):
          data = {'foo': 'bar'}
          request_data = RequestData(data=data)
          self.assertDictEqual(data, request_data.get_converted(type=Request.GET))
          self.assertNotEqual(data, request_data.get_converted(type=Request.POST))
  
subject: Add test for RequestData