wikipedia bot: encode urls correctly in http request & adjust tests.

zulip_bots/zulip_bots/bots/wikipedia/fixtures/test_hash_query.json

@@ -0,0 +1,22 @@
+{
+    "request": {
+        "api_url":"https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=%23&format=json"
+    },
+    "response": {
+        "data": {
+            "status_code":200
+        },
+        "query": {
+            "search": [
+                {
+                    "title":"Number sign"
+                }
+            ]
+        }
+    },
+    "response-headers":{
+        "status":200,
+        "ok":true,
+        "content-type":"application/json; charset=utf-8"
+    }
+}

zulip_bots/zulip_bots/bots/wikipedia/fixtures/test_incorrect_query.json

@@ -1,6 +1,6 @@
 {
     "request": {
-        "api_url":"https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=sssssss kkkkk&format=json"
+        "api_url":"https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=sssssss%20kkkkk&format=json"
     },
     "response": {
         "data": {

zulip_bots/zulip_bots/bots/wikipedia/fixtures/test_multi_word.json

@@ -1,6 +1,6 @@
 {
     "request": {
-        "api_url":"https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=The sky is blue&format=json"
+        "api_url":"https://en.wikipedia.org/w/api.php?action=query&list=search&srsearch=The%20sky%20is%20blue&format=json"
     },
     "response": {
         "data": {

zulip_bots/zulip_bots/bots/wikipedia/test_wikipedia.py

@@ -37,6 +37,15 @@ class TestWikipediaBot(BotTestCase):
                 expected_method='send_reply'
             )
 
+        # Hash query
+        bot_response = "For search term \"#\", https://en.wikipedia.org/wiki/Number_sign"
+        with self.mock_http_conversation('test_hash_query'):
+            self.assert_bot_response(
+                message = {'content': '#'},
+                response = {'content': bot_response},
+                expected_method='send_reply'
+            )
+
         # Incorrect word
         bot_response = "I am sorry. The search term you provided is not found :slightly_frowning_face:"
         with self.mock_http_conversation('test_incorrect_query'):

zulip_bots/zulip_bots/bots/wikipedia/wikipedia.py

@@ -3,6 +3,7 @@ from __future__ import print_function
 import requests
 import logging
 import re
+from six.moves import urllib
 
 # See readme.md for instructions on running this code.
 
@@ -41,7 +42,8 @@ class WikipediaHandler(object):
         if query == '':
             return help_text
         query_wiki_link = ('https://en.wikipedia.org/w/api.php?action=query&'
-                           'list=search&srsearch=%s&format=json' % (query,))
+                           'list=search&srsearch=%s&format=json'
+                           % (urllib.parse.quote(query),))
         try:
             data = requests.get(query_wiki_link)
         except requests.exceptions.RequestException: