You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: configurer_spec.rb
    path of file: ./repos/puppet/spec/unit
    
    the code of the file until where you have to start completion: require 'spec_helper'
require 'puppet/configurer'

describe Puppet::Configurer do
  include PuppetSpec::Files

  before do
    Puppet[:server] = "puppetmaster"
    Puppet[:report] = true

    catalog.add_resource(resource)

    Puppet[:lastrunfile] = file_containing('last_run_summary.yaml', <<~SUMMARY)
    ---
    version:
      config: 1624882680
      puppet: #{Puppet.version}
    application:
      initial_environment: #{Puppet[:environment]}
      converged_environment: #{Puppet[:environment]}
      run_mode: agent
    SUMMARY
  end

  let(:node_name) { Puppet[:
    
        def method_missing(*args)
          raise "failed to do #{args[0]}"
        end
      end.new

      expect(Puppet::Util).to receive(:replace_file).and_yield(fh)

      configurer.save_last_run_summary(report)

      expect(@logs).to include(an_object_having_attributes(level: :err, message: 'Could not save last run local report: failed to do print'))
    end

    it "should create the last run file with the correct mode" do
      expect(Puppet.settings.setting(:lastrunfile)).to receive(:mode).and_return('664')
      configurer.save_last_run_summary(report)

      if Puppet::Util::Platform.windows?
        require 'puppet/util/windows/security'
        mode = Puppet::Util::Windows::Security.get_mode(Puppet[:lastrunfile])
      else
        mode = Puppet::FileSystem.stat(Puppet[:lastrunfile]).mode
      end
      expect(mode & 0777).to eq(0664)
    end