chrome/test/mini_installer/launch_chrome.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 """Launches Chrome.
   6
   7 This script launches Chrome and waits until its window shows up.
   8 """
   9
  10 import optparse
  11 import sys
  12 import time
  13 import win32process
  14
  15 import chrome_helper
  16
  17
  18 def WaitForWindow(process_id, class_pattern):
  19   """Waits until a window specified by |process_id| and class name shows up.
  20
  21   Args:
  22     process_id: The ID of the process that owns the window.
  23     class_pattern: The regular expression pattern of the window class name.
  24
  25   Returns:
  26     A boolean value indicating whether the specified window shows up within
  27     30 seconds.
  28   """
  29   start_time = time.time()
  30   while time.time() - start_time < 30:
  31     if chrome_helper.WindowExists([process_id], class_pattern):
  32       return True
  33     time.sleep(0.1)
  34   return False
  35
  36
  37 def main():
  38   usage = 'usage: %prog chrome_path'
  39   parser = optparse.OptionParser(usage, description='Launch Chrome.')
  40   _, args = parser.parse_args()
  41   if len(args) != 1:
  42     parser.error('Incorrect number of arguments.')
  43   chrome_path = args[0]
  44
  45   # Use CreateProcess rather than subprocess.Popen to avoid side effects such as
  46   # handle interitance.
  47   _, _, process_id, _ = win32process.CreateProcess(None, chrome_path, None,
  48                                                    None, 0, 0, None, None,
  49                                                    win32process.STARTUPINFO())
  50   if not WaitForWindow(process_id, 'Chrome_WidgetWin_'):
  51     raise Exception('Could not launch Chrome.')
  52   return 0
  53
  54
  55 if __name__ == '__main__':
  56   sys.exit(main())