content: import time
  
  
  def assert_clean_console(TestClass):
      def assert_no_console_errors(TestClass):
          TestClass.assertEqual(
              TestClass.driver.execute_script("return window.tests.console.error.length"),
              0,
          )
  
      def assert_no_console_warnings(TestClass):
          TestClass.assertEqual(
              TestClass.driver.execute_script("return window.tests.console.warn.length"),
              0,
          )
  
      assert_no_console_warnings(TestClass)
      assert_no_console_errors(TestClass)
  