Geo: Add settings page empty state

ee/app/views/admin/application_settings/_geo.html.haml

-- return unless Gitlab::Geo.license_allows?
+- if Gitlab::Geo.license_allows?
+  %section.settings.as-geo.no-animate#js-geo-settings{ class: ('expanded' if expanded) }
+    .settings-header
+      %h4
+        = _('GitLab Geo')
+      %button.btn.js-settings-toggle{ type: 'button' }
+        = expanded ? 'Collapse' : 'Expand'
+      %p
+        = _('Geo allows you to replicate your GitLab instance to other geographical locations.')
+    .settings-content
 
-%section.settings.as-geo.no-animate#js-geo-settings{ class: ('expanded' if expanded) }
-  .settings-header
-    %h4
-      = _('GitLab Geo')
-    %button.btn.js-settings-toggle{ type: 'button' }
-      = expanded ? 'Collapse' : 'Expand'
-    %p
-      = _('Geo allows you to replicate your GitLab instance to other geographical locations.')
-  .settings-content
+      = form_for @application_setting, url: admin_application_settings_path(anchor: 'js-geo-settings'), html: { class: 'fieldset-form' } do |f|
+        = form_errors(@application_setting)
 
-    = form_for @application_setting, url: admin_application_settings_path(anchor: 'js-geo-settings'), html: { class: 'fieldset-form' } do |f|
-      = form_errors(@application_setting)
+        %fieldset
+          %p
+            These settings will only take effect if Geo is enabled and require a restart to take effect.
+          .form-group
+            = f.label :geo_status_timeout, 'Connection timeout', class: 'label-bold'
+            = f.number_field :geo_status_timeout, class: 'form-control'
+            .form-text.text-muted
+              The amount of seconds after which a request to get a secondary node
+              status will time out.
 
-      %fieldset
-        %p
-          These settings will only take effect if Geo is enabled and require a restart to take effect.
-        .form-group
-          = f.label :geo_status_timeout, 'Connection timeout', class: 'label-bold'
-          = f.number_field :geo_status_timeout, class: 'form-control'
-          .form-text.text-muted
-            The amount of seconds after which a request to get a secondary node
-            status will time out.
-
-      = f.submit 'Save changes', class: "btn btn-success"
+        = f.submit 'Save changes', class: "btn btn-success"
+- else
+  = render 'shared/empty_states/geo'

ee/changelogs/unreleased/8380-geo-settings-empty-state.yml

+---
+title: "Geo: Add settings page empty state"
+merge_request: 9415
+author:
+type: changed

ee/spec/features/admin/admin_settings_spec.rb

@@ -9,15 +9,29 @@ describe 'Admin updates EE-only settings' do
     allow(License).to receive(:feature_available?).and_return(true)
   end
 
-  it 'Modify GitLab Geo settings' do
-    visit geo_admin_application_settings_path
-    page.within('.as-geo') do
-      fill_in 'Connection timeout', with: 15
-      click_button 'Save changes'
+  context 'Geo settings' do
+    context 'when the license has Geo feature' do
+      it 'allows users to change Geo settings' do
+        visit geo_admin_application_settings_path
+        page.within('.as-geo') do
+          fill_in 'Connection timeout', with: 15
+          click_button 'Save changes'
+        end
+
+        expect(Gitlab::CurrentSettings.geo_status_timeout).to eq(15)
+        expect(page).to have_content "Application settings saved successfully"
+      end
     end
 
-    expect(Gitlab::CurrentSettings.geo_status_timeout).to eq(15)
-    expect(page).to have_content "Application settings saved successfully"
+    context 'when the license does not have Geo feature' do
+      it 'shows empty page' do
+        allow(License).to receive(:feature_available?).and_return(false)
+
+        visit geo_admin_application_settings_path
+
+        expect(page).to have_content "Discover GitLab Geo"
+      end
+    end
   end
 
   it 'Enable external authentication' do