pixiv: fix regression with new user profile urls.

* Update tests to use new Pixiv profile urls.
* Fix issue with artist finder not working when given direct image or
  html page urls.

app/models/artist_url.rb

@@ -27,13 +27,14 @@ class ArtistUrl < ApplicationRecord
       # url = url.sub(%r!^(http://seiga.nicovideo.jp/user/illust/\d+)\?.+!, '\1/')
       url = url.sub(%r!^http://pictures.hentai-foundry.com//!, "http://pictures.hentai-foundry.com/")
 
-      # XXX should be handled by pixiv strategy.
-      url = url.sub(%r!\Ahttps?://www\.pixiv\.net/(?:en/)?users/(\d+)\z!i, 'https://www.pixiv.net/member.php?id=\1')
-
       # the strategy won't always work for twitter because it looks for a status
       url = url.downcase if url =~ %r!^https?://(?:mobile\.)?twitter\.com!
 
       url = Sources::Strategies.find(url).normalize_for_artist_finder
+
+      # XXX the Pixiv strategy should implement normalize_for_artist_finder and return the correct url directly.
+      url = url.sub(%r!\Ahttps?://www\.pixiv\.net/(?:en/)?users/(\d+)\z!i, 'https://www.pixiv.net/member.php?id=\1')
+
       url = url.gsub(/\/+\Z/, "")
       url = url.gsub(%r!^https://!, "http://")
       url + "/"