add ScreenSaverUnlock autotest and teach ScreenSaverRunning to log in

client/site_tests/desktopui_ScreenSaverUnlock/desktopui_ScreenSaverUnlock.py

Index: client/site_tests/desktopui_ScreenSaverUnlock/desktopui_ScreenSaverUnlock.py
diff --git a/client/site_tests/desktopui_ScreenSaverUnlock/desktopui_ScreenSaverUnlock.py b/client/site_tests/desktopui_ScreenSaverUnlock/desktopui_ScreenSaverUnlock.py
new file mode 100644
index 0000000000000000000000000000000000000000..4a42398196b39d2ab3aae7770e1e218c26d8d52c
--- /dev/null
+++ b/client/site_tests/desktopui_ScreenSaverUnlock/desktopui_ScreenSaverUnlock.py
@@ -0,0 +1,43 @@
+# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import logging, os, time, utils
+from autotest_lib.client.bin import site_login, test
+from autotest_lib.client.common_lib import error
+from autotest_lib.client.bin import chromeos_constants
+
+class desktopui_ScreenSaverUnlock(test.test):
+    version = 1
+
+    def system_as(self, cmd, user='chronos'):
+        utils.system('su %s -c \'%s\'' % (user, cmd))
+
+    def setup(self):
+        site_login.setup_autox(self)
+
+    def run_once(self):
+        if site_login.logged_in():
+            if not site_login.attempt_logout():
+                raise error.TestFail('Could not terminate existing session')
+
+        if not site_login.attempt_login(self, 'autox_script.json'):
+            raise error.TestFail('Could not login')
+
+        # first sleep to let the login finish and start xscreensaver
+        time.sleep(10)
+        self.system_as('DISPLAY=:0.0 xscreensaver-command -lock')
+
+        # some sleep to let the screen lock
+        time.sleep(5)
+        self.system_as('DISPLAY=:0.0 xscreensaver-command -time | ' +
+                       'grep -q locked')
+
+        time.sleep(10)
+        if not site_login.attempt_login(self, 'autox_unlock.json'):
+            raise error.TestFail('Could not unlock screensaver')
+
+        # wait for screen to unlock
+        time.sleep(5)
+        self.system_as('DISPLAY=:0.0 xscreensaver-command -time | ' +
+                       'grep -q non-blanked')