interactive bots: Improve wikipedia bot.

zulip_bots/zulip_bots/bots/wikipedia/doc.md

@@ -0,0 +1,41 @@
+# Wikipedia Bot
+
+The Wikipedia bot is a Zulip bot that will search Wikipedia
+for a provided keyword, and fetch a link to the associated
+Wikipedia article. The link is returned to the same stream
+it was @mentioned in
+
+The Wikipedia bot uses the
+[MediaWiki API](https://www.mediawiki.org/wiki/API:Main_page)
+to obtain the search results it returns
+
+Using the Wikipedia bot is as simple as mentioning @\<wikipedia-bot-name\>,
+followed by the keyword:
+
+```
+@<wikipedia-bot-name> <keyword>
+```
+
+## Setup
+
+Beyond the typical obtaining of the zuliprc file, no extra setup is required to use the Wikipedia Bot
+
+## Usage
+
+1. ```@<wikipedia-bot-name> <keyword>``` -
+fetches the link to the appropriate Wikipedia article.
+
+    * For example, `@<wikipedia-bot-name> Zulip`
+will return the link `https://en.wikipedia.org/wiki/Zulip`
+<br>
+
+2. If the keyword does not return an article link,
+the bot will respond with an error message:
+
+    `I am sorry. The search term you provided is not found`
+
+<br>
+
+3. If no keyword is provided, the bot will return the help text:
+
+    ```Please enter your message after @mention-bot```

zulip_bots/zulip_bots/bots/wikipedia/fixtures/test_status_code.json

@@ -0,0 +1,22 @@
+
+{
+    "request": {
+        "api_url":"https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=Zulip&format=json"
+    },
+    "response": {
+        "data": {
+            "status_code":404
+        },
+        "query": {
+            "search": [
+                {
+                    "title":"Number sign"
+                }
+            ]
+        }
+    },
+    "response-headers":{
+        "status":404,
+        "content-type":"text/html"
+    }
+}

zulip_bots/zulip_bots/bots/wikipedia/test_wikipedia.py

@@ -55,3 +55,15 @@ class TestWikipediaBot(StubBotTestCase):
         bot_request = ''
         bot_response = "Please enter your search term after @mention-bot"
         self.verify_reply(bot_request, bot_response)
+
+        # Incorrect status code
+        bot_request = 'Zulip'
+        bot_response = None
+        with self.mock_http_conversation('test_status_code'):
+            self.verify_reply(bot_request, bot_response)
+
+        # Request Exception
+        bot_request = 'Z'
+        bot_response = None
+        with self.mock_request_exception():
+            self.verify_reply(bot_request, bot_response)