Backport pull request #2208

reddit: fix matching twice for reddit.com without www.

Modified new test file from master to contain the required header lines
(future imports & coding comment) for 7.1.x branch.

sopel/modules/reddit.py

@@ -44,7 +44,7 @@
     r'/r/\S+?/comments/(?P<submission>[\w-]+)'
     r'(?:/?(?:[\w%]+/(?P<comment>[\w-]+))?)'
 )
-short_post_url = r'https?://(redd\.it|reddit\.com)/(?P<submission>[\w-]+)'
+short_post_url = r'https?://(redd\.it|reddit\.com)/(?P<submission>[\w-]+)/?$'
 user_url = r'%s/u(?:ser)?/([\w-]+)' % domain
 image_url = r'https?://i\.redd\.it/\S+'
 video_url = r'https?://v\.redd\.it/([\w-]+)'

test/modules/test_modules_reddit.py

@@ -0,0 +1,77 @@
+# coding=utf-8
+"""Tests for Sopel's ``reddit`` plugin"""
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+import pytest
+
+from sopel.trigger import PreTrigger
+
+
+TMP_CONFIG = """
+[core]
+owner = Admin
+nick = Sopel
+enable =
+    reddit
+host = irc.libera.chat
+"""
+
+
+@pytest.fixture
+def bot(botfactory, configfactory):
+    settings = configfactory('default.ini', TMP_CONFIG)
+    return botfactory.preloaded(settings, ['reddit'])
+
+
+MATCHING_URLS = (
+    # URLs the reddit plugin is expected to handle
+    # Should match ONCE each, no more, no less
+    'https://redd.it/123456',
+    'https://redd.it/123456/',
+    'https://reddit.com/123456',
+    'https://reddit.com/123456/',
+    'https://reddit.com/r/subname',
+    'https://reddit.com/r/subname/',
+    'https://www.reddit.com/r/subname',
+    'https://www.reddit.com/r/subname/',
+    'https://reddit.com/r/subname/comments/123456',
+    'https://reddit.com/r/subname/comments/123456/',
+    'https://reddit.com/r/subname/comments/123456?param=value',
+    'https://reddit.com/r/subname/comments/123456/?param=value',
+    'https://www.reddit.com/r/subname/comments/123456',
+    'https://www.reddit.com/r/subname/comments/123456/',
+    'https://reddit.com/r/subname/comments/123456/post_title_slug/234567',
+    'https://reddit.com/r/subname/comments/123456/post_title_slug/234567/',
+    'https://www.reddit.com/r/subname/comments/123456/post_title_slug/234567',
+    'https://www.reddit.com/r/subname/comments/123456/post_title_slug/234567/',
+    'https://reddit.com/r/subname/comments/123456/post_title_slug/234567/?context=1337',
+    'https://www.reddit.com/r/subname/comments/123456/post_title_slug/234567/?context=1337',
+)
+
+
+NON_MATCHING_URLS = (
+    # we don't allow for query parameters on subreddit links (yet?)
+    'https://reddit.com/r/subname?param=value',
+    'https://reddit.com/r/subname/?param=value',
+    'https://www.reddit.com/r/subname?param=value',
+    'https://www.reddit.com/r/subname/?param=value',
+    # "shortlink" style allegedly seen in the wild, but not currently recognized
+    'https://reddit.com/comments/123456',
+    'https://reddit.com/comments/123456/',
+)
+
+
+@pytest.mark.parametrize('link', MATCHING_URLS)
+def test_url_matching(link, bot):
+    line = PreTrigger(bot.nick, ':User!user@irc.libera.chat PRIVMSG #channel {}'.format(link))
+    matches = bot.rules.get_triggered_rules(bot, line)
+
+    assert len([match for match in matches if match[0].get_plugin_name() == 'reddit']) == 1
+
+
+@pytest.mark.parametrize('link', NON_MATCHING_URLS)
+def test_url_non_matching(link, bot):
+    line = PreTrigger(bot.nick, ':User!user@irc.libera.chat PRIVMSG #channel {}'.format(link))
+    matches = bot.rules.get_triggered_rules(bot, line)
+
+    assert len([match for match in matches if match[0].get_plugin_name() == 'reddit']) == 0