Include cadences from parent groups

ee/app/assets/javascripts/iterations/queries/iteration_cadences_list.query.graphql

@@ -9,6 +9,7 @@ query IterationCadences(
 ) {
   group(fullPath: $fullPath) {
     iterationCadences(
+      includeAncestorGroups: true
       before: $beforeCursor
       after: $afterCursor
       first: $firstPageSize

ee/spec/features/groups/iterations/user_views_iteration_cadence_spec.rb

@@ -5,19 +5,21 @@ require 'spec_helper'
 RSpec.describe 'User views iteration cadences', :js do
   let_it_be(:user) { create(:user) }
   let_it_be(:group) { create(:group) }
+  let_it_be(:subgroup) { create(:group, parent: group) }
   let_it_be(:cadence) { create(:iterations_cadence, group: group) }
   let_it_be(:other_cadence) { create(:iterations_cadence, group: group) }
+  let_it_be(:subgroup_cadence) { create(:iterations_cadence, group: subgroup) }
   let_it_be(:iteration_in_cadence) { create(:iteration, group: group, iterations_cadence: cadence) }
   let_it_be(:closed_iteration_in_cadence) { create(:iteration, group: group, iterations_cadence: cadence, start_date: 2.weeks.ago, due_date: 1.week.ago) }
   let_it_be(:iteration_in_other_cadence) { create(:iteration, group: group, iterations_cadence: other_cadence) }
 
   before do
     stub_licensed_features(iterations: true)
-
-    visit group_iteration_cadences_path(group)
   end
 
   it 'shows iteration cadences with iterations when expanded', :aggregate_failures do
+    visit group_iteration_cadences_path(group)
+
     expect(page).to have_title('Iteration cadences')
     expect(page).to have_content(cadence.title)
     expect(page).to have_content(other_cadence.title)
@@ -27,15 +29,25 @@ RSpec.describe 'User views iteration cadences', :js do
     click_button cadence.title
 
     expect(page).to have_content(iteration_in_cadence.title)
+    expect(page).not_to have_content(subgroup_cadence.title)
     expect(page).not_to have_content(iteration_in_other_cadence.title)
     expect(page).not_to have_content(closed_iteration_in_cadence.title)
   end
 
   it 'only shows completed iterations on Done tab', :aggregate_failures do
+    visit group_iteration_cadences_path(group)
     click_link 'Done'
     click_button cadence.title
 
     expect(page).not_to have_content(iteration_in_cadence.title)
     expect(page).to have_content(closed_iteration_in_cadence.title)
   end
+
+  it 'shows inherited cadences in subgroup', :aggregate_failures do
+    visit group_iteration_cadences_path(subgroup)
+
+    expect(page).to have_content(cadence.title)
+    expect(page).to have_content(other_cadence.title)
+    expect(page).to have_content(subgroup_cadence.title)
+  end
 end