Sanitize user address json for PayPal button

lib/views/frontend/spree/shared/_paypal_checkout_button.html.erb

@@ -2,7 +2,7 @@
 <div data-pp-message data-pp-placement="payment" data-pp-amount="<%= @order.total %>"></div>
 
 <script>
-  var address = <%= SolidusPaypalBraintree::Address.new(current_order.ship_address).to_json %>
+  var address = <%= sanitize SolidusPaypalBraintree::Address.new(current_order.ship_address).to_json %>
 
   var paypalOptions = {
     flow: '<%= SolidusPaypalBraintree::Gateway.first.preferred_paypal_flow %>',

spec/features/frontend/paypal_checkout_spec.rb

@@ -60,21 +60,19 @@
     before do
       payment_method
       add_mug_to_cart
-    end
-
-    it "checks out successfully", skip: "Broken. To be revisited" do
       click_button("Checkout")
-      fill_in("order_email", with: "[email protected]")
-
+      fill_in("order_email", with: "[email protected]")
       click_button("Continue")
-      expect(page).to have_content("Customer E-Mail")
-
       fill_in_address
       click_button("Save and Continue")
-
-      expect(page).to have_content("SHIPPING METHOD")
       click_button("Save and Continue")
+    end
+
+    it "formats the address variable correctly" do
+      expect(page.evaluate_script("address['recipientName']")).to eq "Ryan Bigg"
+    end
 
+    it "checks out successfully", skip: "Broken. To be revisited" do
       pend_if_paypal_slow do
         expect_any_instance_of(Spree::Order).not_to receive(:restart_checkout_flow)
         move_through_paypal_popup
@@ -136,8 +134,12 @@ def move_through_paypal_popup
 
   def fill_in_address
     address = "order_bill_address_attributes"
-    fill_in "#{address}_firstname", with: "Ryan"
-    fill_in "#{address}_lastname", with: "Bigg"
+    if page.has_css?("##{address}_firstname", wait: 0)
+      fill_in "#{address}_firstname", with: "Ryan"
+      fill_in "#{address}_lastname", with: "Bigg"
+    else
+      fill_in "#{address}_name", with: "Ryan Bigg"
+    end
     fill_in "#{address}_address1", with: "143 Swan Street"
     fill_in "#{address}_city", with: "San Jose"
     select "United States of America", from: "#{address}_country_id"