Fix group path autofill

ee/app/views/registrations/groups/new.html.haml

@@ -14,7 +14,7 @@
           .form-group.group-name-holder.col-sm-12
             = f.label :name, class: 'label-bold' do
               = _('Group name (your organization)')
-            = f.text_field :name, class: 'form-control',
+            = f.text_field :name, class: 'form-control js-autofill-group-name',
               required: true,
               title: _('Please fill in a descriptive name for your group.'),
               autofocus: true
@@ -27,7 +27,8 @@
               .group-root-path.input-group-prepend.has-tooltip{ title: root_url, :'data-placement' => 'bottom' }
                 .input-group-text
                   %span= root_url
-              = f.text_field :path, class: 'form-control js-validate-group-path',
+              = f.hidden_field :parent_id
+              = f.text_field :path, class: 'form-control js-validate-group-path js-autofill-group-path',
                 required: true,
                 pattern: Gitlab::PathRegex::NAMESPACE_FORMAT_REGEX_JS,
                 title: _('Please choose a group URL with no special characters.')

ee/spec/features/registrations/new_group_spec.rb

@@ -11,10 +11,14 @@ RSpec.describe 'New group screen', :js do
     visit new_users_sign_up_group_path
   end
 
-  subject { page }
-
   it 'shows the progress bar with the correct steps' do
-    expect(subject).to have_content('Create your group')
-    expect(subject).to have_content('1. Your profile 2. Your GitLab group 3. Your first project')
+    expect(page).to have_content('Create your group')
+    expect(page).to have_content('1. Your profile 2. Your GitLab group 3. Your first project')
+  end
+
+  it 'autofills the group path' do
+    fill_in 'group_name', with: 'test'
+
+    expect(page).to have_field('group_path', with: 'test')
   end
 end