[recipes.cfg] ONLY support jsonpb.

recipe_engine/unittests/fetch_test.py

 #!/usr/bin/env python
 # Copyright 2016 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 import base64
 import json
 import unittest
 
 import test_env
@@ skipping 174 matching lines @@
 class TestGitiles(unittest.TestCase):
   def setUp(self):
     requests_ssl.disable_check()
 
   @mock.patch('__builtin__.open', mock.mock_open())
   @mock.patch('shutil.rmtree')
   @mock.patch('os.makedirs')
   @mock.patch('tarfile.open')
   @mock.patch('requests.get')
   def test_checkout(self, requests_get, tarfile_open, makedirs, rmtree):
-    proto_text = u"""
-api_version: 1
-project_id: "foo"
-recipes_path: "path/to/recipes"
-""".lstrip()
+    proto_text = u"""{
+  "api_version": 1,
+  "project_id": "foo",
+  "recipes_path": "path/to/recipes"
+}""".lstrip()
     requests_get.side_effect = [
         mock.Mock(text=u')]}\'\n{ "commit": "abc123" }', status_code=200),
         mock.Mock(text=base64.b64encode(proto_text), status_code=200),
         mock.Mock(content='', status_code=200),
     ]
 
     fetch.GitilesBackend().checkout(
         'repo', 'revision', 'dir', allow_fetch=True)
 
     requests_get.assert_has_calls([
@@ skipping 130 matching lines @@
       'author': 'author',
       'message': 'message',
     })
     self.assertEqual(counts['sleeps'], 4)
     requests_get.assert_has_calls([
       mock.call('repo/+/revision?format=JSON'),
     ] * 5)
 
 if __name__ == '__main__':
   unittest.main()