Rspec-puppet support library for testing exported resources

exported_resources.rb

# require Puppet::Resource::Catalog::Compiler
require 'puppet/indirector/catalog/compiler'

# Magic to add a catalog.exported_resources accessor
class Puppet::Resource::Catalog::Compiler
  alias_method :filter_exclude_exported_resources, :filter
  def filter(catalog)
    filter_exclude_exported_resources(catalog).tap do |filtered|
      # Every time we filter a catalog, add a .exported_resources to it.
      filtered.define_singleton_method(:exported_resources) do
        # The block passed to filter returns `false` if it wants to keep a resource. Go figure.
        catalog.filter { |r| !r.exported? }
      end
    end
  end
end

module Support
  module ExportedResources
    # Get exported resources as a catalog. Compatible with all catalog matchers, e.g.
    # `expect(exported_resources).to contain_myexportedresource('name').with_param('value')`
    def exported_resources
      # Catalog matchers expect something that can receive .call
      proc { subject.call.exported_resources }
    end
  end
end

RSpec.configure do |c|
  c.include Support::ExportedResources
end

Tested with puppet 3.8 - no idea if it works with any other version of puppet

thanks! this was just what I needed. to make it clearer for neophytes like myself, usage is typically:

 it { expect(exported_resources).to contain_myexportedresource("#{facts[:fqdn]}-foo")
                                   .with_param('value')
 }