contrib_bots: Add tests for xkcd bot.

contrib_bots/bots/xkcd/test_xkcd.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python
+
+from __future__ import absolute_import
+from __future__ import print_function
+
+import mock
+import os
+import sys
+
+our_dir = os.path.dirname(os.path.abspath(__file__))
+# For dev setups, we can find the API in the repo itself.
+if os.path.exists(os.path.join(our_dir, '..')):
+    sys.path.insert(0, '..')
+from bots_test_lib import BotTestCase
+
+class TestXkcdBot(BotTestCase):
+    bot_name = "xkcd"
+
+    @mock.patch('logging.exception')
+    def test_bot(self, mock_logging_exception):
+        help_txt = "xkcd bot supports these commands:"
+        err_txt  = "xkcd bot only supports these commands:"
+        commands = '''
+* `@xkcd help` to show this help message.
+* `@xkcd latest` to fetch the latest comic strip from xkcd.
+* `@xkcd random` to fetch a random comic strip from xkcd.
+* `@xkcd <comic id>` to fetch a comic strip based on `<comic id>` e.g `@xkcd 1234`.'''
+        invalid_id_txt = "Sorry, there is likely no xkcd comic strip with id: #"
+        expected = {
+            "": err_txt+commands,
+            "help": help_txt+commands,
+            "x": err_txt+commands,
+            "0": invalid_id_txt + "0",
+            "1": ("#1: **Barrel - Part 1**\n[Don't we all.]"
+                  "(https://imgs.xkcd.com/comics/barrel_cropped_(1).jpg)"),
+            "1800": ("#1800: **Chess Notation**\n"
+                     "[I've decided to score all my conversations "
+                     "using chess win-loss notation. (??)]"
+                     "(https://imgs.xkcd.com/comics/chess_notation.png)"),
+            "999999999": invalid_id_txt + "999999999",
+        }
+        for m, r in expected.items():
+            self.assert_bot_output(
+                {'content': m, 'type': "private", 'sender_email': "foo"}, r)
+            self.assert_bot_output(
+                {'content': m, 'type': "stream", 'sender_email': "foo"}, r)