followup bot: Fix help response and configure streams.

From @showell:

We had a PR here with lots going on, and the commits weren't
very well organized, and then there were some tricky merge
conflicts from another PR.  So I just squashed them all into
one commit.

What this does:
    * allow you to configure your followup stream
    * provide help in followup stream
    * add more testing to followup stream
    * add get_response() helper for tests

Fixes #173
Fixes #174

zulip_bots/zulip_bots/bots/followup/followup.config

@@ -0,0 +1,2 @@
+[followup]
+stream = 'followup'

zulip_bots/zulip_bots/bots/followup/followup.py

@@ -23,15 +23,21 @@ class FollowupHandler(object):
             called "followup" that your API user can send to.
             '''
 
+    def initialize(self, bot_handler: Any) -> None:
+        self.config_info = bot_handler.get_config_info('followup', optional=False)
+        self.stream = self.config_info.get("stream", 'followup')
+
     def handle_message(self, message: Dict[str, str], bot_handler: Any) -> None:
         if message['content'] == '':
             bot_response = "Please specify the message you want to send to followup stream after @mention-bot"
             bot_handler.send_reply(message, bot_response)
+        elif message['content'] == 'help':
+            bot_handler.send_reply(message, self.usage())
         else:
             bot_response = self.get_bot_followup_response(message)
             bot_handler.send_message(dict(
                 type='stream',
-                to='followup',
+                to=self.stream,
                 subject=message['sender_email'],
                 content=bot_response,
             ))

zulip_bots/zulip_bots/bots/followup/test_followup.py

@@ -3,29 +3,60 @@
 from __future__ import absolute_import
 from __future__ import print_function
 
-from zulip_bots.test_lib import BotTestCase
+from zulip_bots.test_lib import (
+    StubBotHandler,
+    StubBotTestCase,
+    get_bot_message_handler,
+)
 
 from typing import Any
 
-class TestFollowUpBot(BotTestCase):
+
+class TestFollowUpBot(StubBotTestCase):
     bot_name = "followup"
 
-    def test_bot(self) -> None:
-        expected_send_reply = [
-            ("", 'Please specify the message you want to send to followup stream after @mention-bot')
-        ]
-        self.check_expected_responses(expected_send_reply, expected_method='send_reply')
+    def test_followup_stream(self) -> None:
+        message = dict(
+            content='feed the cat',
+            type='stream',
+            sender_email='foo@example.com',
+        )
 
-        expected_send_message = [
-            ("foo",
-             {'type': 'stream',
-              'to': 'followup',
-              'subject': 'foo_sender@zulip.com',
-              'content': 'from foo_sender@zulip.com: foo'}),
-            ("I have completed my task",
-             {'type': 'stream',
-              'to': 'followup',
-              'subject': 'foo_sender@zulip.com',
-              'content': 'from foo_sender@zulip.com: I have completed my task'}),
-        ]
-        self.check_expected_responses(expected_send_message, expected_method='send_message')
+        with self.mock_config_info({'stream': 'followup'}):
+            response = self.get_response(message)
+
+        self.assertEqual(response['content'], 'from foo@example.com: feed the cat')
+        self.assertEqual(response['to'], 'followup')
+
+    def test_different_stream(self) -> None:
+        message = dict(
+            content='feed the cat',
+            type='stream',
+            sender_email='foo@example.com',
+        )
+
+        with self.mock_config_info({'stream': 'issue'}):
+            response = self.get_response(message)
+
+        self.assertEqual(response['content'], 'from foo@example.com: feed the cat')
+        self.assertEqual(response['to'], 'issue')
+
+    def test_bot_responds_to_empty_message(self) -> None:
+        bot_response = 'Please specify the message you want to send to followup stream after @mention-bot'
+
+        with self.mock_config_info({'stream': 'followup'}):
+            self.verify_reply('', bot_response)
+
+    def test_help_text(self) -> None:
+        request = 'help'
+        bot_response = '''
+            This plugin will allow users to flag messages
+            as being follow-up items.  Users should preface
+            messages with "@mention-bot".
+
+            Before running this, make sure to create a stream
+            called "followup" that your API user can send to.
+            '''
+
+        with self.mock_config_info({'stream': 'followup'}):
+            self.verify_reply(request, bot_response)

zulip_bots/zulip_bots/test_lib.py

@@ -100,6 +100,18 @@ class StubBotTestCase(TestCase):
 
     bot_name = ''
 
+    def get_response(self, message):
+        # type: (Dict[str, Any]) -> Dict[str, Any]
+        bot = get_bot_message_handler(self.bot_name)
+        bot_handler = StubBotHandler()
+
+        if hasattr(bot, 'initialize'):
+            bot.initialize(bot_handler)
+
+        bot_handler.reset_transcript()
+        bot.handle_message(message, bot_handler)
+        return bot_handler.unique_response()
+
     def verify_reply(self, request, response):
         # type: (str, str) -> None