Add formatted_data attribute to Git::WikiPage

Related to #39805

lib/gitlab/git/wiki_page.rb

 module Gitlab
   module Git
     class WikiPage
-      attr_reader :url_path, :title, :format, :path, :version, :raw_data, :name, :text_data, :historical
+      attr_reader :url_path, :title, :format, :path, :version, :raw_data, :name, :text_data, :historical, :formatted_data
 
       # This class is meant to be serializable so that it can be constructed
       # by Gitaly and sent over the network to GitLab.
@@ -21,6 +21,7 @@ module Gitlab
         @raw_data = gollum_page.raw_data
         @name = gollum_page.name
         @historical = gollum_page.historical?
+        @formatted_data = gollum_page.formatted_data if gollum_page.is_a?(Gollum::Page)
 
         @version = version
       end

spec/models/wiki_page_spec.rb

@@ -386,6 +386,17 @@ describe WikiPage do
     end
   end
 
+  describe '#formatted_content' do
+    it 'returns processed content of the page', :disable_gitaly do
+      subject.create({ title: "RDoc", content: "*bold*", format: "rdoc" })
+      page = wiki.find_page('RDoc')
+
+      expect(page.formatted_content).to eq("\n<p><strong>bold</strong></p>\n")
+
+      destroy_page('RDoc')
+    end
+  end
+
   private
 
   def remove_temp_repo(path)