[recipes.py] move run arg parsing to its module.

unittests/recipes_py_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 repo_test_util
-
-import recipes
-from recipe_engine import arguments_pb2
-from google.protobuf import json_format as jsonpb
-
-
-class TestOperationalArgs(unittest.TestCase):
-
-  def test_operational_arg_parsing(self):
-    # For convenience, we'll define the JSONPB data as a Python dict that we
-    # will then dump into JSON.
-    op_args = jsonpb.Parse(json.dumps({
-      'properties': {'property': {
-        'a': {'s': 'Hello'},
-        'b': {'int': -12345},
-        'c': {'uint': 12345},
-        'd': {'d': 3.14159},
-        'e': {'b': True},
-        'f': {'data': base64.b64encode('\x60\x0d\xd0\x65')},
-        'g': {'map': {
-          'property': {
-            'foo': {'s': 'FOO!'},
-            'bar': {'map': {
-              'property': {
-                'baz': {'s': 'BAZ!'},
-              },
-            }},
-          }},
-        },
-        'h': {'list': {
-          'property': [
-            {'s': 'foo'},
-            {'s': 'bar'},
-            {'s': 'baz'},
-          ],
-        }},
-      }},
-      'annotationFlags': {
-        'emitTimestamp': True,
-      },
-    }), arguments_pb2.Arguments())
-
-    self.assertEqual(
-        recipes._op_properties_to_dict(op_args.properties.property),
-        {
-          u'a': u'Hello',
-          u'b': -12345L,
-          u'c': 12345L,
-          u'd': 3.14159,
-          u'e': True,
-          u'f': '\x60\x0d\xd0\x65',
-          u'g': {
-            u'foo': u'FOO!',
-            u'bar': {
-              u'baz': u'BAZ!',
-            },
-          },
-          u'h': [
-            u'foo',
-            u'bar',
-            u'baz',
-          ],
-        })
-
-
-if __name__ == '__main__':
-  result = unittest.main()