Redirect to customer portal or registration

Unless the experiment is enabled, we still want to redirect
users to the previous subscription flow on customers app.

ee/app/controllers/subscriptions_controller.rb

@@ -2,9 +2,17 @@
 
 class SubscriptionsController < ApplicationController
   layout 'checkout'
+  skip_before_action :authenticate_user!, only: :new
 
   def new
-    return redirect_to dashboard_projects_path unless Feature.enabled?(:paid_signup_flow)
+    if experiment_enabled?(:paid_signup_flow)
+      return if current_user
+
+      store_location_for :user, request.fullpath
+      redirect_to new_user_registration_path
+    else
+      redirect_to customer_portal_new_subscription_url
+    end
   end
 
   def payment_form
@@ -22,4 +30,8 @@ class SubscriptionsController < ApplicationController
   def client
     Gitlab::SubscriptionPortal::Client
   end
+
+  def customer_portal_new_subscription_url
+    "#{EE::SUBSCRIPTIONS_URL}/subscriptions/new?plan_id=#{params[:plan_id]}&transaction=create_subscription"
+  end
 end

ee/spec/controllers/subscriptions_controller_spec.rb

@@ -8,33 +8,40 @@ describe SubscriptionsController do
   describe 'GET #new' do
     subject { get :new, params: { plan_id: 'bronze_id' } }
 
-    context 'with unauthorized user' do
-      it { is_expected.to have_gitlab_http_status 302 }
-      it { is_expected.to redirect_to new_user_session_path }
-    end
-
-    context 'with authorized user' do
+    context 'with experiment enabled' do
       before do
-        sign_in(user)
+        stub_experiment(paid_signup_flow: true)
+        stub_experiment_for_user(paid_signup_flow: true)
+      end
+
+      context 'with unauthorized user' do
+        it { is_expected.to have_gitlab_http_status 302 }
+        it { is_expected.to redirect_to new_user_registration_path }
+
+        it 'stores subscription URL for later' do
+          subject
+
+          expect(controller.stored_location_for(:user)).to eq(new_subscriptions_path(plan_id: 'bronze_id'))
+        end
       end
 
-      context 'with feature flag enabled' do
+      context 'with authorized user' do
         before do
-          stub_feature_flags(paid_signup_flow: true)
+          sign_in(user)
         end
 
         it { is_expected.to render_template 'layouts/checkout' }
         it { is_expected.to render_template :new }
       end
+    end
 
-      context 'with feature flag disabled' do
-        before do
-          stub_feature_flags(paid_signup_flow: false)
-        end
-
-        it { is_expected.to have_gitlab_http_status 302 }
-        it { is_expected.to redirect_to dashboard_projects_path }
+    context 'with experiment disabled' do
+      before do
+        stub_experiment(paid_signup_flow: false)
+        stub_experiment_for_user(paid_signup_flow: false)
       end
+
+      it { is_expected.to redirect_to "#{EE::SUBSCRIPTIONS_URL}/subscriptions/new?plan_id=bronze_id&transaction=create_subscription" }
     end
   end
 

lib/gitlab/experimentation.rb

@@ -16,6 +16,12 @@ module Gitlab
         environment: ::Gitlab.dev_env_or_com?,
         enabled_ratio: 1,
         tracking_category: 'Growth::Acquisition::Experiment::SignUpFlow'
+      },
+      paid_signup_flow: {
+        feature_toggle: :paid_signup_flow,
+        environment: ::Gitlab.dev_env_or_com?,
+        enabled_ratio: 0.1,
+        tracking_category: 'Growth::Acquisition::Experiment::PaidSignUpFlow'
       }
     }.freeze