Trial select form to remember posted form fields

Currently trial select form does not remember posted form fields. This
MR adds posted values

ee/app/helpers/ee/trial_helper.rb

@@ -13,7 +13,7 @@ module EE
       ], selected)
     end
 
-    def namespace_options_for_select
+    def namespace_options_for_select(selected = nil)
       groups = current_user.manageable_groups.map { |g| [g.name, g.id] }
       users = [[current_user.namespace.name, current_user.namespace_id]]
 
@@ -23,7 +23,7 @@ module EE
         'Users' => users
       }
 
-      grouped_options_for_select(grouped_options, nil, prompt: _('Please select'))
+      grouped_options_for_select(grouped_options, selected, prompt: _('Please select'))
     end
 
     def show_trial_errors?(namespace, service_result)

ee/app/views/trials/select.html.haml

@@ -12,7 +12,7 @@
 = form_tag apply_trials_path(glm_params), method: :post do
   .form-group.gl-select2-html5-required-fix
     = label_tag :namespace_id, _('This subscription is for'), for: :namespace_id, class: 'col-form-label'
-    = select_tag :namespace_id, namespace_options_for_select, class: 'select2', required: true
+    = select_tag :namespace_id, namespace_options_for_select(params[:namespace_id]), class: 'select2', required: true
   #group_name.form-group.hidden
     = label_tag :new_group_name, _('New Group Name'), for: :new_group_name, class: 'col-form-label'
     = text_field_tag :new_group_name, nil, class: 'form-control'
@@ -20,10 +20,10 @@
     = label_tag :trial_entity, _('Is this GitLab trial for your company?')
     .gl-form-checkbox-group
       .gl-form-checkbox.form-check.form-check-inline
-        = radio_button_tag :trial_entity, :company, false, required: true, class: 'form-check-input'
+        = radio_button_tag :trial_entity, :company, params[:trial_entity]=='company', required: true, class: 'form-check-input'
         = label_tag :trial_entity_company, _('Yes'), class: 'form-check-label'
       .gl-form-checkbox.form-check.form-check-inline
-        = radio_button_tag :trial_entity, :individual, false, required: true, class: 'form-check-input'
+        = radio_button_tag :trial_entity, :individual, params[:trial_entity]=='individual', required: true, class: 'form-check-input'
         = label_tag :trial_entity_individual, _('No'), class: 'form-check-label'
   = submit_tag _('Start your free trial'), class: 'btn btn-success btn-block'
 

ee/spec/features/trials/select_namespace_spec.rb

@@ -136,11 +136,14 @@ describe 'Trial Select Namespace', :js do
 
           expect(find('.flash-text')).to have_text(error_message)
           expect(current_path).to eq(apply_trials_path)
+          expect(find('#namespace_id', visible: false).value).to eq(user.namespace.id.to_s)
 
           # new group name should be functional
           select2 '0', from: '#namespace_id'
 
           expect(page).to have_field('New Group Name')
+          expect(find('#trial_entity_individual').checked?).to be(false)
+          expect(find('#trial_entity_company').checked?).to be(true)
         end
       end
     end