spree/spree — comment on commit 6bf5a373ba97353a62a191d88470885af642529b
File: core/spec/requests/admin/orders/customer_details_spec.rb line 30
By radar:

The AJAX is completely broken. There's nothing there to do the autocomplete as far as I can tell. You would need to re-implement it. Just create a test application and try doing it in that.