Switch ctest to array/appends for cros_au_test_harness call

bin/ctest.py

 #!/usr/bin/python
 #
 # 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.
 
 """Wrapper for tests that are run on builders."""
 
 import fileinput
 import optparse
@@ skipping 239 matching lines @@
     zip_server_base:  base url for zipped images.
     no_graphics: boolean - If True, disable graphics during vm test.
     type: which test harness to run.  Possible values: real, vm.
     remote: ip address for real test harness run.
   """
   crosutils_root = os.path.join(os.path.dirname(__file__), '..')
   download_folder = os.path.abspath('latest_download')
   zip_url = GetLatestZipUrl(board, channel, latest_url_base, zip_server_base)
   GrabZipAndExtractImage(zip_url, download_folder, _IMAGE_TO_EXTRACT)
 
-  no_graphics_flag = ''
-  if no_graphics: no_graphics_flag = '--no_graphics'
-
   # Tests go here.
   latest_image = RunCommand(['./get_latest_image.sh', '--board=%s' % board],
                             cwd=crosutils_root, redirect_stdout=True,
                             print_cmd=True).strip()
 
-  RunCommand(['bin/cros_au_test_harness',
-              '--base_image=%s' % os.path.join(download_folder,
-                                                 _IMAGE_TO_EXTRACT),
-              '--target_image=%s' % os.path.join(latest_image,
-                                                 _IMAGE_TO_EXTRACT),
-              no_graphics_flag,
-              '--board=%s' % board,
-              '--type=%s' % type,
-              '--remote=%s' % remote,
-             ], cwd=crosutils_root)
+  cmd = ['bin/cros_au_test_harness',
+         '--base_image=%s' % os.path.join(download_folder,
+                                          _IMAGE_TO_EXTRACT),
+         '--target_image=%s' % os.path.join(latest_image,
+                                            _IMAGE_TO_EXTRACT),
+         '--board=%s' % board,
+         '--type=%s' % type,
+         '--remote=%s' % remote,
+         ]
+  if no_graphics: cmd.append('--no_graphics')
+
+  RunCommand(cmd, cwd=crosutils_root)
 
 
 def main():
   parser = optparse.OptionParser()
   parser.add_option('-b', '--board',
                     help='board for the image to compare against.')
   parser.add_option('-c', '--channel',
                     help='channel for the image to compare against.')
   parser.add_option('--cache', default=False, action='store_true',
                     help='Cache payloads')
@@ skipping 29 matching lines @@
     WipeDevServerCache()
 
   RunAUTestHarness(options.board, options.channel, options.latestbase,
                    options.zipbase, options.no_graphics, options.type,
                    options.remote)
 
 
 if __name__ == '__main__':
   main()