Initial checkin of the me2me pyauto automation:

chrome/test/functional/chromoting/mock_pref_pane.py

Index: chrome/test/functional/chromoting/mock_pref_pane.py
===================================================================
--- chrome/test/functional/chromoting/mock_pref_pane.py	(revision 0)
+++ chrome/test/functional/chromoting/mock_pref_pane.py	(revision 0)
@@ -0,0 +1,99 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Mock pref pane for testing purpose."""
+
+import Foundation
+import os
+import signal
+import subprocess
+import sys
+import tempfile
+import time
+
+
+_SERVICE_NAME = "org.chromium.chromoting"

[Nirnimesh, 2012/08/06 19:13:53]

use ' instead of " for consistency here and everywhere.

Do not use globals. Move it inside the right functions. Use classes if
necessary.

[yihongg, 2012/08/08 01:04:48]

Done.

+
+
+def _GetJobPid():
+  """Gets the org.chromium.chromoting job id."""
+  process = subprocess.Popen(["launchctl", "list"], stdout=subprocess.PIPE)
+  pid = None
+  for line in process.stdout:
+    # Format is:
+    #   12345  -  my.job       (if my.job is running, number is job's PID)
+    #   -      0  my.other.job (if my.other.job is not running)
+    fields = line.strip().split('\t')
+    if fields[2] == _SERVICE_NAME and fields[0] != "-":
+      pid = fields[0]
+      break
+  process.wait()
+  return pid
+
+
+def main():
+  """Handles the mock pref pane actions."""
+  print "*** Started mock pref pane ***"
+  print "*** EUID=%d, UID=%d ***" % (os.geteuid(), os.getuid())
+
+  real_user_id = os.getuid()
+  config_file = os.path.join(tempfile.gettempdir(), "%s.json" % _SERVICE_NAME)
+  tool_script = "/Library/PrivilegedHelperTools/%s.me2me.sh" % _SERVICE_NAME

[Nirnimesh, 2012/08/06 19:13:53]

This is for mac only. what about other platforms?

Either make it work for all platforms, or clearly call out so and make
placeholder for improvements for other platforms.

[yihongg, 2012/08/08 01:04:48]

This is mac only.

+
+  if sys.argv[1] == 'enable':
+    # Elevate privileges, otherwise tool_script executes with EUID != 0.
+    os.setuid(0)
+    subprocess.call([tool_script, "--enable"], stdin=open(config_file))
+
+    # Drop privileges, start the launchd job as the logged-in user.
+    os.setuid(real_user_id)
+    subprocess.call(["launchctl", "start", _SERVICE_NAME])
+
+    # Starting a launchd job is an asynchronous operation that typically takes
+    # a couple of seconds, so poll until the job has started.
+    for i in range(1, 10):
+      if _GetJobPid():
+        print "*** org.chromium.chromoting is running ***"
+        break
+      time.sleep(2)
+  elif sys.argv[1] == 'disable':
+    # Elevate privileges, otherwise tool_script executes with EUID != 0.
+    os.setuid(0)
+    subprocess.call([tool_script, "--disable"], stdin=open(config_file))
+
+    # Drop privileges, stop the launchd job as the logged-in user.
+    os.setuid(real_user_id)
+    subprocess.call(["launchctl", "stop", _SERVICE_NAME])
+
+    # Stopping a launchd job is an asynchronous operation that typically takes
+    # a couple of seconds, so poll until the job has stopped.
+    for i in range(1, 10):

[Nirnimesh, 2012/08/06 19:13:53]

i -> _
since i is unused

[yihongg, 2012/08/08 01:04:48]

Done.

+      if not _GetJobPid():
+        print "*** org.chromium.chromoting is not running ***"
+        break
+      time.sleep(2)

[Nirnimesh, 2012/08/06 19:13:53]

Sleeping is not allowed, since it makes tests flaky
(often on a slow machine). Wait for the right event instead.

[yihongg, 2012/08/08 01:04:48]

Agree sleep will cause flaky test in general. For this specific case, sleep here
is to giving some time until the next get job id call. There is no event that we
can wait on for this.

+  elif sys.argv[1] == 'changepin':
+    # Elevate privileges, otherwise tool_script executes with EUID != 0.
+    os.setuid(0)
+    subprocess.call([tool_script, "--save-config"], stdin=open(config_file))
+
+    # Drop privileges and send SIGHUP to org.chromium.chromoting
+    os.setuid(real_user_id)
+    os.kill(int(_GetJobPid()), signal.SIGHUP)
+  else:
+    print >> sys.stderr, (
+        'Invalid syntax')
+    return 1
+
+  notif_center = Foundation.NSDistributedNotificationCenter.defaultCenter()
+  notif_center.postNotificationName_object_userInfo_(
+    _SERVICE_NAME + ".update_succeeded", None, None)
+
+  time.sleep(10)

[Nirnimesh, 2012/08/06 19:13:53]

what is this sleep for?

[yihongg, 2012/08/08 01:04:48]

This is put here to wait until webapp gets notification originally. Tried the
test without this and it is working. So I am removing this wait.

+
+  return 0

[Nirnimesh, 2012/08/06 19:13:53]

remove

[yihongg, 2012/08/08 01:04:48]

Done.

+
+if __name__ == '__main__':
+  sys.exit(main())
+