Hook up the updated `WikiLinkFilter` to the wiki controllers.

- Need to pass in a `page_slug` to the filter, so it can rewrite based
  on the current page (all links are rewritten to the level of the app root).
- The earlier `markdown_preview` endpoint was at the level of the wiki.
  We need to know the current page (for rewriting, as above), so this
  commit moves the endpoint to the level of a wiki page.
- Fix all tests

1 files changed, 4 insertions, 0 deletions

diff --git a/spec/support/markdown_feature.rb b/spec/support/markdown_feature.rb
index 7fc6d6fcc5e..a79386b5db9 100644
--- a/spec/support/markdown_feature.rb
+++ b/spec/support/markdown_feature.rb
@@ -32,6 +32,10 @@ class MarkdownFeature
     @project_wiki ||= ProjectWiki.new(project, user)
   end
 
+  def project_wiki_page
+    @project_wiki_page ||= build(:wiki_page, wiki: project_wiki)
+  end
+
   def issue
     @issue ||= create(:issue, project: project)
   end