new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from time import sleep
  from unittest.mock import MagicMock
  
  from wdom.document import get_document
  from wdom.server import _tornado
  from wdom.server.handler import event_handler
  from wdom.testing import TestCase
  from wdom.window import customElements
  
  
  class TestWindow(TestCase):
      def setUp(self):
          super().setUp()
          self.doc = get_document()
          self.win = self.doc.defaultView
          self.conn_mock = MagicMock()
          _tornado.connections.append(self.conn_mock)
  
      def tearDown(self):
          _tornado.connections.remove(self.conn_mock)
  
      def test_custom_elements_registory(self):
          self.assertIs(self.win.customElements, customElements)
  
      def test_document(self):
          self.assertIs(self.win.document, self.doc)
          self.assertIs(self.win, self.doc.defaultView)
  
      def test_rimo_id(self):
          self.assertEqual(self.win.rimo_id, 'window')
  
      def test_add_eventlistener(self):
          mock = MagicMock(_is_coroutine=False)
          self.win.js_exec = MagicMock(_is_coroutine=False)
          self.win.addEventListener('click', mock)
          self.win.js_exec.assert_called_once_with('addEventListener', 'click')
          msg = {
              'type': 'click',
              'currentTarget': {'id': 'window'},
              'target': {'id': 'window'},
          }
          e = event_handler(msg)
          mock.assert_called_once_with(e)
  
      def test_add_event_handler_doc(self):
          mock = MagicMock(_is_coroutine=False)
          self.win.addEventListener('click', mock)
          msg = {
              'type': 'click',
              'currentTarget': {'id': 'document'},
              'target': {'id': 'document'},
          }
          event_handler(msg)
          sleep(0.1)
          mock.assert_not_called()
  
subject: Add test for window module