rspec_vcr.rb

RSpec.configure do |config|

  config.around do |example|
    VCR.use_cassette('stripe-customer') do |cassette|
      example.run
    end
  end

end

user_factory.rb

FactoryGirl.define do
  factory :user do
    username  { Faker::Internet.user_name.sub(/_|\./, '') }
    email     { Faker::Internet.email }
    password  { Faker::Lorem.characters(8) }
  end
end

user_observer.rb

class UserObserver < ActiveRecord::Observer

  def after_create(user)
    user.create_profile!

    begin
      customer =  Stripe::Customer.create(
        email: user.email,
        plan: 'default'
        )

      user.stripe_customer_id = customer.id
      user.save!
    rescue Stripe::InvalidRequestError => e
      raise e
    end

  end
end

user_spec.rb

describe :InstanceMethods do
  let(:user) { FactoryGirl.create(:user) }

  describe "#flexible_name" do
    it "returns the name when name is specified" do
      user.profile.first_name = "Foo"
      user.profile.last_name = "Bar"

      user.flexible_name.should eq("Foo Bar")
    end
  end
end

vcr.rb

require 'vcr'

VCR.configure do |config|
  config.default_cassette_options = { record: :once, re_record_interval: 1.day }
  config.cassette_library_dir = 'spec/fixtures/cassettes'
  config.hook_into :webmock
  config.configure_rspec_metadata!
end