text: import time
  import os
  import sys
  sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
  from nw_util import *
  
  from selenium import webdriver
  from selenium.webdriver.chrome.options import Options
  chrome_options = Options()
  chrome_options.add_argument("nwapp=" + os.path.dirname(os.path.abspath(__file__)))
  
  capabilities = {"pageLoadStrategy": "none"}
  
  driver = webdriver.Chrome(executable_path=os.environ['CHROMEDRIVER'], chrome_options=chrome_options, service_log_path="log", service_args=["--verbose"], desired_capabilities = capabilities)
  time.sleep(1)
  try:
      print driver.current_url
      result = driver.find_element_by_id('result').get_attribute('innerHTML')
      print result
      assert("success" in result)
      old_handle = driver.current_window_handle
      driver.find_element_by_id('reloadapp').click()
      print 'wait for app reload'
      wait_window_handles(driver, lambda handles: len(handles) != 0 and handles[0] != old_handle)
      # devtools will be opened as the first window handle
      print driver.window_handles
      try:
          switch_to_devtools(driver, devtools_window=driver.window_handles[0])
      except:
          if len(driver.window_handles) < 2:
              driver.find_element_by_id('opendevtools').click()
              wait_window_handles(driver, lambda handles: len(handles) == 2)
          switch_to_devtools(driver, devtools_window=driver.window_handles[1])
      print 'click Console panel'
      devtools_click_tab(driver, 'console')
      print 'send_keys "document.getElementById(\'result\').innerHTML<enter>"'
      time.sleep(1)
      devtools_type_in_console(driver, 'document.getElementById(\'result\').innerHTML\n')
      time.sleep(1)
      result = driver.find_element_by_css_selector('.console-user-command-result .console-message-text .object-value-string').get_attribute('textContent')
      print result
      assert("success" in result)    
  finally:
      driver.quit()
  