Handy pattern for puts-statement debugging in Rails

config-initializers-breadcrumb.rb

if Rails.env.test? || Rails.env.development?
  module Kernel
    def __breadcrumb__(msg = "")
      return unless $debug
      msg = msg.to_s
      breadcrumb = ">>> #{caller.first}"
      breadcrumb << "\n--> #{msg}" if msg.present?
      Rails.logger.debug breadcrumb
      puts '', breadcrumb
    end
  end
end

spec-spec_helper.rb

RSpec.configure do |config|
  config.after(:each) do
    $debug = false
  end
end