2 files changed, 58 insertions, 0 deletions
diff --git a/spec/features/admin/admin_settings_spec.rb b/spec/features/admin/admin_settings_spec.rb
index af1c153dec8..a3229fe1741 100644
--- a/spec/features/admin/admin_settings_spec.rb
+++ b/spec/features/admin/admin_settings_spec.rb
@@ -78,6 +78,18 @@ describe 'Admin updates settings' do
     expect(page).to have_content "Application settings saved successfully"
   end
 
+  it 'Change New users set to external', :js do
+    user_internal_regex = find('#application_setting_user_default_internal_regex', visible: :all)
+
+    expect(user_internal_regex).to be_readonly
+    expect(user_internal_regex['placeholder']).to eq 'To define internal users, first enable new users set to external'
+
+    check 'application_setting_user_default_external'
+
+    expect(user_internal_regex).not_to be_readonly
+    expect(user_internal_regex['placeholder']).to eq 'Regex pattern'
+  end
+
   it 'Change Sign-in restrictions' do
     page.within('.as-signin') do
       fill_in 'Home page URL', with: 'https://about.gitlab.com/'
diff --git a/spec/features/admin/admin_users_spec.rb b/spec/features/admin/admin_users_spec.rb
index b2eaeb1c487..d32f33ca1e2 100644
--- a/spec/features/admin/admin_users_spec.rb
+++ b/spec/features/admin/admin_users_spec.rb
@@ -125,6 +125,52 @@ describe "Admin::Users" do
         expect(page).to have_content('Username can contain only letters, digits')
       end
     end
+
+    context 'with new users set to external enabled' do
+      context 'with regex to match internal user email address set', :js do
+        before do
+          stub_application_setting(user_default_external: true)
+          stub_application_setting(user_default_internal_regex: '.internal@')
+
+          visit new_admin_user_path
+        end
+
+        def expects_external_to_be_checked
+          expect(find('#user_external')).to be_checked
+        end
+
+        def expects_external_to_be_unchecked
+          expect(find('#user_external')).not_to be_checked
+        end
+
+        def expects_warning_to_be_hidden
+          expect(find('#warning_external_automatically_set', visible: :all)[:class]).to include 'hidden'
+        end
+
+        def expects_warning_to_be_shown
+          expect(find('#warning_external_automatically_set')[:class]).not_to include 'hidden'
+        end
+
+        it 'automatically unchecks external for matching email' do
+          expects_external_to_be_checked
+          expects_warning_to_be_hidden
+
+          fill_in 'user_email', with: 'test.internal@domain.ch'
+
+          expects_external_to_be_unchecked
+          expects_warning_to_be_shown
+
+          fill_in 'user_email', with: 'test@domain.ch'
+
+          expects_external_to_be_checked
+          expects_warning_to_be_hidden
+
+          uncheck 'user_external'
+
+          expects_warning_to_be_hidden
+        end
+      end
+    end
   end
 
   describe "GET /admin/users/:id" do