Fix stripe request spec by providing en enterprise_id

The enterprise_id is used to lookup a StripeAccount which is provided to the Spree::Token#create call in the StripeConnect gateway

spec/factories.rb

@@ -363,6 +363,11 @@ FactoryGirl.define do
     end
   end
 
+  factory :stripe_payment_method, :class => Spree::Gateway::StripeConnect do
+    name 'Stripe'
+    environment 'test'
+  end
+
   factory :stripe_account do
     enterprise { FactoryGirl.create :distributor_enterprise }
     stripe_user_id "abc123"

spec/requests/stripe_connect_checkout_spec.rb

@@ -8,7 +8,7 @@ describe "Submitting Stripe Connect charge requests", type: :request do
   let!(:enterprise) { create(:distributor_enterprise) }
   let!(:exchange) { create(:exchange, order_cycle: order_cycle, sender: order_cycle.coordinator, receiver: enterprise, incoming: false, pickup_time: "Monday") }
   let!(:shipping_method) { create(:shipping_method, calculator: Spree::Calculator::FlatRate.new(preferred_amount: 0), distributors: [enterprise]) }
-  let!(:payment_method) { create(:payment_method, type: "Spree::Gateway::StripeConnect", distributors: [enterprise]) }
+  let!(:payment_method) { create(:stripe_payment_method, distributors: [enterprise], preferred_enterprise_id: enterprise.id) }
   let!(:stripe_account) { create(:stripe_account, enterprise: enterprise) }
   let!(:line_item) { create(:line_item, price: 12.34) }
   let!(:order) { line_item.order }