Add more smoke test for gclient config and gclient revinfo.

gclient.py

 #!/usr/bin/python
 # Copyright (c) 2010 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.
 
 """A wrapper script to manage a set of client modules in different SCM.
 
 This script is intended to be used to help basic management of client
 program sources residing in one or more Subversion modules and Git
 repositories, along with other modules it depends on, also in Subversion or Git,
@@ skipping 816 matching lines @@
 provided, then configuration is read from a specified Subversion server
 URL.
 """
   parser.add_option("--spec",
                     help="create a gclient file containing the provided "
                          "string. Due to Cygwin/Python brokenness, it "
                          "probably can't contain any newlines.")
   parser.add_option("--name",
                     help="overrides the default name for the solution")
   (options, args) = parser.parse_args(args)
-  if len(args) < 1 and not options.spec:
-    raise gclient_utils.Error("required argument missing; see 'gclient help "
-                              "config'")
+  if ((options.spec and args) or len(args) > 2 or
+      (not options.spec and not args)):
+    parser.error('Inconsistent arguments. Use either --spec or one or 2 args')
+
   if os.path.exists(options.config_filename):
     raise gclient_utils.Error("%s file already exists in the current directory"
                                   % options.config_filename)
   client = GClient('.', options)
   if options.spec:
     client.SetConfig(options.spec)
   else:
     base_url = args[0].rstrip('/')
     if not options.name:
       name = base_url.split("/")[-1]
@@ skipping 257 matching lines @@
 
 
 if "__main__" == __name__:
   try:
     sys.exit(Main(sys.argv[1:]))
   except gclient_utils.Error, e:
     print >> sys.stderr, "Error: %s" % str(e)
     sys.exit(1)
 
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