Add more detailed tracking for the new_dropdown

app/views/layouts/header/_new_dropdown.html.haml

+- new_repo_experiment_text = content_for(:new_repo_experiment)
 %li.header-new.dropdown{ data: { track_label: "new_dropdown", track_event: "click_dropdown", track_experiment: "new_repo" } }
   = link_to new_project_path, class: "header-new-dropdown-toggle has-tooltip qa-new-menu-toggle", id: "js-onboarding-new-project-link", title: _("New..."), ref: 'tooltip', aria: { label: _("New...") }, data: { toggle: 'dropdown', placement: 'bottom', container: 'body', display: 'static' } do
     = sprite_icon('plus-square')
@@ -12,9 +13,9 @@
           %li.dropdown-bold-header
             = _('This group')
           - if create_group_project
-            %li= link_to _('New project'), new_project_path(namespace_id: @group.id)
+            %li= link_to new_repo_experiment_text, new_project_path(namespace_id: @group.id), data: { track_experiment: 'new_repo', track_event: 'click_link_new_project_group', track_label: 'plus_menu_dropdown' }
           - if create_group_subgroup
-            %li= link_to _('New subgroup'), new_group_path(parent_id: @group.id)
+            %li= link_to _('New subgroup'), new_group_path(parent_id: @group.id), data: { track_event: 'click_link_new_subgroup', track_label: 'plus_menu_dropdown' }
           = render_if_exists 'layouts/header/create_epic_new_dropdown_item'
           = render 'layouts/header/group_invite_members_new_dropdown_item'
           %li.divider
@@ -29,16 +30,18 @@
           %li.dropdown-bold-header
             = _('This project')
           - if create_project_issue
-            %li= link_to _('New issue'), new_project_issue_path(@project)
+            %li= link_to _('New issue'), new_project_issue_path(@project), data: { track_event: 'click_link_new_issue', track_label: 'plus_menu_dropdown' }
           - if merge_project
-            %li= link_to _('New merge request'), project_new_merge_request_path(merge_project)
+            %li= link_to _('New merge request'), project_new_merge_request_path(merge_project), data: { track_event: 'click_link_new_mr', track_label: 'plus_menu_dropdown' }
+
           - if create_project_snippet
-            %li= link_to _('New snippet'), new_project_snippet_path(@project)
+            %li= link_to _('New snippet'), new_project_snippet_path(@project), data: { track_event: 'click_link_new_snippet_project', track_label: 'plus_menu_dropdown' }
           = render 'layouts/header/project_invite_members_new_dropdown_item'
           %li.divider
           %li.dropdown-bold-header GitLab
-      = content_for :new_repo_experiment
+      - if current_user.can_create_project?
+        %li= link_to new_repo_experiment_text, new_project_path, class: 'qa-global-new-project-link', data: { track_experiment: 'new_repo', track_event: 'click_link_new_project', track_label: 'plus_menu_dropdown' }
       - if current_user.can_create_group?
-        %li= link_to _('New group'), new_group_path
+        %li= link_to _('New group'), new_group_path, data: { track_event: 'click_link_new_group', track_label: 'plus_menu_dropdown' }
       - if current_user.can?(:create_snippet)
-        %li= link_to _('New snippet'), new_snippet_path, class: 'qa-global-new-snippet-link'
+        %li= link_to _('New snippet'), new_snippet_path, data: { track_event: 'click_link_new_snippet_parent', track_label: 'plus_menu_dropdown' }, class: 'qa-global-new-snippet-link'

app/views/layouts/header/_new_repo_experiment.html.haml

 - content_for :new_repo_experiment do
-  - if current_user&.can_create_project?
-    - experiment(:new_repo, user: current_user) do |e|
-      - e.use do
-        %li= link_to _('New project'), new_project_path, class: 'qa-global-new-project-link', data: { track_experiment: 'new_repo', track_event: 'click_link', track_label: 'plus_menu_dropdown' }
-      - e.try do
-        %li= link_to _('New project/repository'), new_project_path, class: 'qa-global-new-project-link', data: { track_experiment: 'new_repo', track_event: 'click_link', track_label: 'plus_menu_dropdown' }
+  - experiment(:new_repo, user: current_user) do |e|
+    - e.use do
+      = _('New project')
+    - e.try do
+      = _('New project/repository')

ee/app/views/layouts/header/_create_epic_new_dropdown_item.haml

 - return unless can?(current_user, :create_epic, @group)
 
-%li= link_to _('New epic'), new_group_epic_path(@group)
+%li= link_to _('New epic'), new_group_epic_path(@group), data: { track_event: 'click_link_new_epic', track_label: 'plus_menu_dropdown' }

spec/features/groups_spec.rb

@@ -439,6 +439,35 @@ RSpec.describe 'Group' do
     end
   end
 
+  describe 'new_repo experiment' do
+    let_it_be(:group) { create_default(:group) }
+
+    it 'when in candidate renders "project/repository"' do
+      stub_experiments(new_repo: :candidate)
+
+      visit group_path(group)
+
+      find('li.header-new.dropdown').click
+
+      page.within('li.header-new.dropdown') do
+        expect(page).to have_selector('a', text: 'New project/repository')
+      end
+    end
+
+    it 'when in control renders "project/repository"' do
+      stub_experiments(new_repo: :control)
+
+      visit group_path(group)
+
+      find('li.header-new.dropdown').click
+
+      page.within('li.header-new.dropdown') do
+        expect(page).to have_selector('a', text: 'New project')
+        expect(page).to have_no_selector('a', text: 'New project/repository')
+      end
+    end
+  end
+
   def remove_with_confirm(button_text, confirm_with)
     click_button button_text
     fill_in 'confirm_name_input', with: confirm_with

spec/views/layouts/header/_new_dropdown.haml_spec.rb

@@ -52,6 +52,7 @@ RSpec.describe 'layouts/header/_new_dropdown' do
       end
 
       it 'has a "New project" link' do
+        render('layouts/header/new_repo_experiment')
         render
 
         expect(rendered).to have_link('New project', href: new_project_path(namespace_id: group.id))