vcr_hooks.rb

module SpecHelpers

  # See more on this: https://github.com/vcr/vcr/issues/600

  module VCRHooks
    # @return [Proc] registered proc
    def register_vcr_hook(type, *args, &block)
      check_hook_type_valid!(type)
      # Do not use #hooks hash directly, VCR wrap block into FilteredHook struct
      VCR.configuration.send(type, *args, &block); block
    end

    # NOTE: if you use same block for several hooks they will be removed altogether
    def unregister_vcr_hook(type, hook)
      check_hook_type_valid!(type)

      found = false
      VCR.configuration.hooks[type].delete_if do |filtered_hook|
        filtered_hook.hook == hook && found = true
      end

      raise "Can't find VCR hook for #{type} to remove" unless found
    end

    private

    VCR_HOOKS = %i[before_http_request after_http_request around_http_request before_playback before_record]

    def check_hook_type_valid!(type)
      raise "Unknown VCR hook type: #{type}" unless VCR_HOOKS.include?(type)
    end
  end
end

RSpec.configuration.include(SpecHelpers::VCRHooks, type: :request)

vcr_hooks_cooking_spec.rb

require 'rails_helper'

describe "Creating Braintree customer" do

  let(:customer_id) { 'dj_app_customer' }
  let(:customer_data) do
    # Specify your own customer ID. Customer IDs are case insensitive.
    {id:         customer_id,
     first_name: 'John',
     last_name:  'Doe'}
  end

  context "new customer" do
    example "successfully created" do
      VCR.use_cassette('braintree/customer_creation_success') do
        result = Braintree::Customer.create(customer_data)
        expect(result).to be_success
      end
    end
  end

  context "customer already exists" do

    let!(:create_customer_hook) do
      register_vcr_hook(:before_http_request, :real?) do
        logger.info 'Creating customer before running spec...'

        # We can't use ``VCR#turn_off!`` here, we have cassette already loaded.
        # Also, ``WebMock.allow/disable_net_connect!`` cause errors using enable/disable
        WebMock.disable!
        begin
          logger.info "Checking if Customer with ID #{customer_id} already exists..."
          Braintree::Customer.find(customer_id)
        rescue Braintree::NotFoundError
          logger.info 'No Customer exists, running spec...'
        ensure
          WebMock.enable!
        end
      end
    end

    after do
      unregister_vcr_hook(:before_http_request, create_customer_hook)
    end

    it "fail" do
      VCR.use_cassette('braintree/customer_creation_already_exists', record: :all) do
        result = Braintree::Customer.create(customer_data)
        expect(result).not_to be_success
      end
    end

    it "just delete customer for testing hooks purposes" do
      VCR.turn_off! do
        Braintree::Customer.delete(customer_id)
      end
    end
  end
end