Add feature categories to controllers beginning with E

app/controllers/explore/groups_controller.rb

@@ -3,6 +3,8 @@
 class Explore::GroupsController < Explore::ApplicationController
   include GroupTree
 
+  feature_category :subgroups, only: [:index]
+
   def index
     render_group_tree GroupsFinder.new(current_user).execute
   end

app/controllers/explore/projects_controller.rb

@@ -18,6 +18,8 @@ class Explore::ProjectsController < Explore::ApplicationController
 
   rescue_from PageOutOfBoundsError, with: :page_out_of_bounds
 
+  feature_category :projects, only: [:index, :trending, :starred]
+
   def index
     @projects = load_projects
 

app/controllers/explore/snippets_controller.rb

@@ -3,6 +3,8 @@
 class Explore::SnippetsController < Explore::ApplicationController
   include Gitlab::NoteableMetadata
 
+  feature_category :snippets, only: [:index]
+
   def index
     @snippets = SnippetsFinder.new(current_user, explore: true)
       .execute

spec/controllers/every_controller_spec.rb

@@ -24,7 +24,7 @@ RSpec.describe "Every controller" do
     let_it_be(:routes_without_category) do
       controller_actions.map do |controller, action|
         next if controller.feature_category_for_action(action)
-        next unless controller.to_s.start_with?('B', 'C', 'D')
+        next unless controller.to_s.start_with?('B', 'C', 'D', 'E')
 
         "#{controller}##{action}"
       end.compact