add exported extractor results

test/results/bitly.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+from gallery_dl.extractor import urlshortener
+
+
+__tests__ = (
+{
+    "#url"     : "https://bit.ly/3cWIUgq",
+    "#category": ("urlshortener", "bitly", "link"),
+    "#class"   : urlshortener.UrlshortenerLinkExtractor,
+    "#pattern" : "^https://gumroad.com/l/storm_b1",
+    "#count"   : 1,
+},
+
+)