Add specs for dismissing of message

app/views/projects/services/_integrations.html.haml

@@ -12,7 +12,7 @@
       %th{ role: 'columnheader', scope: 'col', 'aria-colindex': 4 }= _('Last updated')
 
   %tbody{ role: 'rowgroup' }
-    - @integrations.each do |integration|
+    - @integrations&.each do |integration|
       %tr{ role: 'row' }
         %td{ role: 'cell', 'aria-colindex': 1 }
           = boolean_to_icon integration.activated?

spec/features/admin/admin_settings_spec.rb

@@ -235,6 +235,25 @@ describe 'Admin updates settings', :clean_gitlab_redis_shared_state, :do_not_moc
       end
     end
 
+    context 'Integration page', :js do
+      before do
+        visit integrations_admin_application_settings_path
+      end
+
+      it 'allows user to dismiss deprecation notice' do
+        expect(page).to have_content('Some settings have moved')
+
+        click_button 'Dismiss'
+        wait_for_requests
+
+        expect(page).not_to have_content('Some settings have moved')
+
+        visit integrations_admin_application_settings_path
+
+        expect(page).not_to have_content('Some settings have moved')
+      end
+    end
+
     context 'CI/CD page' do
       it 'Change CI/CD settings' do
         visit ci_cd_admin_application_settings_path

spec/helpers/user_callouts_helper_spec.rb

@@ -47,6 +47,26 @@ describe UserCalloutsHelper do
     end
   end
 
+  describe '.show_admin_integrations_moved?' do
+    subject { helper.show_admin_integrations_moved? }
+
+    context 'when user has not dismissed' do
+      before do
+        allow(helper).to receive(:user_dismissed?).with(described_class::ADMIN_INTEGRATIONS_MOVED) { false }
+      end
+
+      it { is_expected.to be true }
+    end
+
+    context 'when user dismissed' do
+      before do
+        allow(helper).to receive(:user_dismissed?).with(described_class::ADMIN_INTEGRATIONS_MOVED) { true }
+      end
+
+      it { is_expected.to be false }
+    end
+  end
+
   describe '.render_flash_user_callout' do
     it 'renders the flash_user_callout partial' do
       expect(helper).to receive(:render)