Search: add ability to sort epics

Changelog: changed
EE: true

app/presenters/search_service_presenter.rb

@@ -16,7 +16,7 @@ class SearchServicePresenter < Gitlab::View::Presenter::Delegated
     blobs: :with_web_entity_associations
   }.freeze
 
-  SORT_ENABLED_SCOPES = %w(issues merge_requests).freeze
+  SORT_ENABLED_SCOPES = %w(issues merge_requests epics).freeze
 
   def search_objects
     @search_objects ||= begin

ee/lib/ee/gitlab/group_search_results.rb

@@ -5,9 +5,10 @@ module EE
     module GroupSearchResults
       extend ::Gitlab::Utils::Override
 
-      override :epics
       def epics
-        EpicsFinder.new(current_user, issuable_params).execute.search(query)
+        epics = EpicsFinder.new(current_user, issuable_params).execute.search(query)
+
+        apply_sort(epics)
       end
     end
   end

ee/lib/ee/gitlab/search_results.rb

@@ -15,12 +15,6 @@ module EE
         end
       end
 
-      def epics
-        groups_finder = GroupsFinder.new(current_user)
-
-        ::Epic.in_selected_groups(groups_finder.execute).search(query)
-      end
-
       private
 
       override :projects

ee/spec/lib/ee/gitlab/group_search_results_spec.rb

@@ -8,20 +8,40 @@ RSpec.describe Gitlab::GroupSearchResults do
 
   subject { described_class.new(user, query, group: group) }
 
+  before do
+    create(:group_member, group: group, user: user)
+    group.add_owner(user)
+    stub_licensed_features(epics: true)
+  end
+
   describe '#epics' do
-    let(:query) { 'foo' }
-    let!(:searchable_epic) { create(:epic, title: 'foo', group: group) }
-    let!(:another_searchable_epic) { create(:epic, title: 'foo 2', group: group) }
-    let!(:another_epic) { create(:epic) }
-
-    before do
-      create(:group_member, group: group, user: user)
-      group.add_owner(user)
-      stub_licensed_features(epics: true)
+    context 'searching' do
+      let(:query) { 'foo' }
+      let!(:searchable_epic) { create(:epic, title: 'foo', group: group) }
+      let!(:another_searchable_epic) { create(:epic, title: 'foo 2', group: group) }
+      let!(:another_epic) { create(:epic) }
+
+      it 'finds epics' do
+        expect(subject.objects('epics')).to match_array([searchable_epic, another_searchable_epic])
+      end
     end
 
-    it 'finds epics' do
-      expect(subject.objects('epics')).to match_array([searchable_epic, another_searchable_epic])
+    context 'ordering' do
+      let(:scope) { 'epics' }
+      let(:filters) { {} }
+
+      let!(:old_result) { create(:epic, group: group, title: 'sorted old', created_at: 1.month.ago) }
+      let!(:new_result) { create(:epic, group: group, title: 'sorted recent', created_at: 1.day.ago) }
+      let!(:very_old_result) { create(:epic, group: group, title: 'sorted very old', created_at: 1.year.ago) }
+
+      let!(:old_updated) { create(:epic, group: group, title: 'updated old', updated_at: 1.month.ago) }
+      let!(:new_updated) { create(:epic, group: group, title: 'updated recent', updated_at: 1.day.ago) }
+      let!(:very_old_updated) { create(:epic, group: group, title: 'updated very old', updated_at: 1.year.ago) }
+
+      include_examples 'search results sorted' do
+        let(:results_created) { described_class.new(user, 'sorted', Project.order(:id), group: group, sort: sort, filters: filters) }
+        let(:results_updated) { described_class.new(user, 'updated', Project.order(:id), group: group, sort: sort, filters: filters) }
+      end
     end
   end
 end

ee/spec/lib/ee/gitlab/search_results_spec.rb

@@ -24,22 +24,6 @@ RSpec.describe Gitlab::SearchResults do
     end
   end
 
-  describe '#epics' do
-    let!(:group) { create(:group, :private) }
-    let!(:searchable_epic) { create(:epic, title: 'foo', group: group) }
-    let!(:another_group) { create(:group, :private) }
-    let!(:another_epic) { create(:epic, title: 'foo 2', group: another_group) }
-
-    before do
-      create(:group_member, group: group, user: user)
-      group.add_owner(user)
-    end
-
-    it 'finds epics' do
-      expect(subject.objects('epics')).to match_array([searchable_epic])
-    end
-  end
-
   def search
     subject.objects('projects').map { |project| project.compliance_framework_setting.framework }
   end