bots: Test get_config_info with giphy bot.

This involves both using the new `initialize`
method for calling `get_config_info`, and
refactoring the testing framework by adding a
way for mocking this method.

api/bots/giphy/giphy.py

@@ -12,9 +12,10 @@ import re
 
 GIPHY_TRANSLATE_API = 'http://api.giphy.com/v1/gifs/translate'
 
-if not os.path.exists(os.environ['HOME'] + '/.giphy_config'):
+if not os.path.exists(os.path.join(os.path.dirname(os.path.realpath(__file__)), 'giphy.conf')):
-    print('Giphy bot config file not found, please set up it in ~/.giphy_config'
+    print('Giphy bot config file not found, please set it up in this bot\'s folder '
-          '\n\nUsing format:\n\n[giphy-config]\nkey=<giphy API key here>\n\n')
+          'with the name \'giphy.conf\'\n\nUsing format:\n\n[giphy-config]\nkey=<giphy'
+          'API key here>\n\n')
     sys.exit(1)
 
 
@@ -33,6 +34,10 @@ class GiphyHandler(object):
             The bot responds also to private messages.
             '''
 
+    def initialize(self, bot_handler):
+        global config_info
+        config_info = bot_handler.get_config_info('giphy')
+
     def handle_message(self, message, bot_handler, state_handler):
         bot_response = get_bot_giphy_response(message, bot_handler)
         bot_handler.send_reply(message, bot_response)
@@ -42,13 +47,6 @@ class GiphyNoResultException(Exception):
     pass
 
 
-def get_giphy_api_key_from_config():
-    config = SafeConfigParser()
-    with open(os.environ['HOME'] + '/.giphy_config', 'r') as config_file:
-        config.readfp(config_file)
-    return config.get("giphy-config", "key")
-
-
 def get_url_gif_giphy(keyword, api_key):
     # Return a URL for a Giphy GIF based on keywords given.
     # In case of error, e.g. failure to fetch a GIF URL, it will
@@ -78,7 +76,7 @@ def get_bot_giphy_response(message, bot_handler):
     # The bot will post the appropriate message for the error.
     keyword = message['content']
     try:
-        gif_url = get_url_gif_giphy(keyword, get_giphy_api_key_from_config())
+        gif_url = get_url_gif_giphy(keyword, config_info['key'])
     except requests.exceptions.ConnectionError:
         return ('Uh oh, sorry :slightly_frowning_face:, I '
                 'cannot process your request right now. But, '

api/bots/giphy/test_giphy.py

@@ -22,7 +22,9 @@ class TestGiphyBot(BotTestCase):
                        '(https://media4.giphy.com/media/3o6ZtpxSZbQRRnwCKQ/giphy.gif)' \
                        '[](/static/images/interactive-bot/giphy/powered-by-giphy.png)'
         # This message calls the `send_reply` function of BotHandlerApi
-        with self.mock_http_conversation('test_1'):
+        with self.mock_config_info({'key': '12345678'}), \
+                self.mock_http_conversation('test_1'):
+            self.initialize_bot()
             self.assert_bot_response(
                 message = {'content': 'Hello'},
                 response = {'content': bot_response},

api/bots_api/bots_test_lib.py

@@ -52,6 +52,10 @@ class BotTestCase(TestCase):
         # type: () -> None
         self.patcher.stop()
 
+    def initialize_bot(self):
+        # type: () -> None
+        self.message_handler.initialize(self.MockClass())
+
     def check_expected_responses(self, expectations, expected_method='send_reply',
                                  email="foo_sender@zulip.com", recipient="foo", subject="foo",
                                  type="all"):
@@ -87,6 +91,13 @@ class BotTestCase(TestCase):
         else:
             instance.send_reply.assert_called_with(message, response['content'])
 
+    @contextmanager
+    def mock_config_info(self, config_info):
+        # type: (Dict[str, str]) -> Any
+        self.MockClass.return_value.get_config_info.return_value = config_info
+        yield
+        self.MockClass.return_value.get_config_info.return_value = None
+
     @contextmanager
     def mock_http_conversation(self, test_name):
         # type: (str) -> Any