Implement Gateway#create_profile

app/models/solidus_paypal_braintree/customer.rb

@@ -0,0 +1,4 @@
+class SolidusPaypalBraintree::Customer < ApplicationRecord
+  belongs_to :user, class_name: "Spree::User"
+  has_many :sources, class_name: "SolidusPaypalBraintree::Source", inverse_of: :customer
+end

app/models/solidus_paypal_braintree/gateway.rb

@@ -131,7 +131,20 @@ def cancel(response_code)
       end
     end
 
-    def create_profile(_payment)
+    # Creates a new customer profile in Braintree
+    #
+    # @api public
+    # @param payment [Spree::Payment]
+    # @return [SolidusPaypalBraintree::Customer]
+    def create_profile(payment)
+      source = payment.source
+
+      result = Braintree::Customer.create
+      customer_id = result.customer.id
+
+      source.create_customer!(braintree_customer_id: customer_id).tap do
+        source.save!
+      end
     end
 
     # @return [String]

app/models/solidus_paypal_braintree/source.rb

@@ -1,6 +1,9 @@
 class SolidusPaypalBraintree::Source < ApplicationRecord
+  belongs_to :user, class_name: "Spree::User"
   belongs_to :payment_method, class_name: 'Spree::PaymentMethod'
 
+  belongs_to :customer, class_name: "SolidusPaypalBraintree::Customer"
+
   # we are not currenctly supporting an "imported" flag
   def imported
     false

db/migrate/20160830061749_create_solidus_paypal_braintree_sources.rb

@@ -4,6 +4,7 @@ def change
       t.string :nonce
       t.string :payment_type
       t.integer :user_id, index: true
+      t.references :customer, index: true
       t.references :payment_method, foreign_key: { to_table: :spree_payment_method }, index: { name: 'index_braintree_source_payment_method' }
 
       t.timestamps null: false

db/migrate/20160906201711_create_solidus_paypal_braintree_customers.rb

@@ -0,0 +1,11 @@
+class CreateSolidusPaypalBraintreeCustomers < ActiveRecord::Migration
+  def change
+    create_table :solidus_paypal_braintree_customers do |t|
+      t.references :user
+      t.string :braintree_customer_id
+    end
+
+    add_index :solidus_paypal_braintree_customers, :user_id, unique: true, name: "index_braintree_customers_on_user_id"
+    add_index :solidus_paypal_braintree_customers, :braintree_customer_id, unique: true, name: "index_braintree_customers_on_braintree_customer_id"
+  end
+end

spec/controllers/solidus_paypal_braintree/checkouts_controller_spec.rb

@@ -4,7 +4,8 @@
 RSpec.describe SolidusPaypalBraintree::CheckoutsController, type: :controller do
   include_context 'order ready for payment'
 
-  describe 'PATCH update' do
+  cassette_options = { cassette_name: "checkouts_controller/update" }
+  describe 'PATCH update', vcr: cassette_options do
     subject(:patch_update) { patch :update, params }
 
     let(:params) do