Fix #4683: Automove _(style) tags when artists are processed via BUR.

app/logical/tag_mover.rb

@@ -13,6 +13,7 @@ class TagMover
       move_aliases!
       move_implications!
       move_cosplay_tag!
+      move_style_tag!
       move_artist!
       move_wiki!
       move_saved_searches!
@@ -84,6 +85,15 @@ class TagMover
     end
   end
 
+  def move_style_tag!
+    old_style_tag = "#{old_tag.name}_(style)"
+    new_style_tag = "#{new_tag.name}_(style)"
+
+    if old_tag.artist? && Tag.nonempty.exists?(name: old_style_tag)
+      TagMover.new(old_style_tag, new_style_tag).move!
+    end
+  end
+
   def move_saved_searches!
     SavedSearch.rewrite_queries!(old_tag.name, new_tag.name)
   end

test/unit/bulk_update_request_test.rb

@@ -297,6 +297,19 @@ class BulkUpdateRequestTest < ActiveSupport::TestCase
             assert_equal("tohsaka_rin_(cosplay)", @wiki.reload.title)
           end
         end
+
+        context "when renaming an artist tag with a *_(style) tag" do
+          should "move the *_(style) tag as well" do
+            create(:tag, name: "tanaka_takayuki", category: Tag.categories.artist)
+            @post = create(:post, tag_string: "tanaka_takayuki_(style)")
+            @wiki = create(:wiki_page, title: "tanaka_takayuki_(style)")
+
+            create_bur!("rename tanaka_takayuki -> tony_taka", @admin)
+
+            assert_equal("tony_taka_(style)", @post.reload.tag_string)
+            assert_equal("tony_taka_(style)", @wiki.reload.title)
+          end
+        end
       end
 
       context "the nuke command" do