old_contents: import httmock
  
  from chatexchange3 import Browser
  
  from .test.mock_responses import (
      only_httmock, favorite_with_test_fkey, TEST_FKEY)
  
  
  def test_update_fkey():
      """
      Tests that the correct chat fkey is retrived, using a mock response
      with a copy of a real response from /chats/join/favorite
      """
      with only_httmock(favorite_with_test_fkey):
          browser = Browser()
          browser.host = 'stackexchange.com'
  
          assert browser.chat_fkey == TEST_FKEY
  
  
  def test_user_agent():
      """
      Tests that HTTP requests made from a Browser use the intended
      User-Agent.
  
      WebSocket connections are not tested.
      """
      good_requests = []
  
      @httmock.all_requests
      def verify_user_agent(url, request):
          assert request.headers['user-agent'] == Browser.user_agent
          good_requests.append(request)
          return '<!doctype html><html><head><title>Hello<body>World'
  
      with only_httmock(verify_user_agent):
          browser = Browser()
  
          browser.get_soup('http://example.com/', with_chat_root=False)
          browser.get_soup('http://example.com/2', with_chat_root=False)
  
          assert len(good_requests) == 2, "Unexpected number of requests"
  
new_contents: import httmock
  
  from chatexchange3 import Browser
  
  from test.mock_responses import (
      only_httmock, favorite_with_test_fkey, TEST_FKEY)
  
  
  def test_update_fkey():
      """
      Tests that the correct chat fkey is retrived, using a mock response
      with a copy of a real response from /chats/join/favorite
      """
      with only_httmock(favorite_with_test_fkey):
          browser = Browser()
          browser.host = 'stackexchange.com'
  
          assert browser.chat_fkey == TEST_FKEY
  
  
  def test_user_agent():
      """
      Tests that HTTP requests made from a Browser use the intended
      User-Agent.
  
      WebSocket connections are not tested.
      """
      good_requests = []
  
      @httmock.all_requests
      def verify_user_agent(url, request):
          assert request.headers['user-agent'] == Browser.user_agent
          good_requests.append(request)
          return '<!doctype html><html><head><title>Hello<body>World'
  
      with only_httmock(verify_user_agent):
          browser = Browser()
  
          browser.get_soup('http://example.com/', with_chat_root=False)
          browser.get_soup('http://example.com/2', with_chat_root=False)
  
          assert len(good_requests) == 2, "Unexpected number of requests"
  
subject: fix chatexchange3 tests for Python 3