How to test chef resource using file_cache_path

Question

I have the following resource in one my recipes

download_dir = "#{Chef::Config[:file_cache_path]}\\BESClient"
task_done = "#{Chef::Config[:file_cache_path]}\\BESClient\\installed.txt"

file task_done do
  content Date.today.to_s
  action :create_if_missing
end

Corresponding to this I have written the following chef spec test

    context 'Windows 2012R2: when all attributes are default' do
    let(:chef_run) do
      runner = ChefSpec::ServerRunner.new(platform: 'windows', version: '2012R2', file_cache_path: 'C:\Program Files (x86)\BigFix Enterprise')
      runner.converge(described_recipe)
    end

    it 'converges successfully' do
      expect { chef_run }.to_not raise_error
    end

    download_dir = 'C:\\Program Files (x86)\\BigFix Enterprise\\BESClient'
    task_done = 'C:\\Program Files (x86)\\BigFix Enterprise\\BESClient\\installed.txt'

    it 'creates a file with attributes' do
       expect(chef_run).to create_file_if_missing(task_done.to_s).with(
         content: Date.today.to_s)
    end

This tries to create C:\Program Files (x86)\BigFix Enterprise directory on my workstation but if I remove file_cache_path variable from the Runner the unit test fails with the following error

  1) besclient::windows Windows 2012R2: when all attributes are default creates
a file with attributes
     Failure/Error:
       expect(chef_run).to create_file_if_missing(task_done.to_s).with(
         content: Date.today.to_s
       )

       expected "file[C:\Program Files (x86)\BigFix Enterprise\BESClient\install
ed.txt]" with action :create_if_missing to be in Chef run. Other file resources:


         file[C:/Users/AKANKS~1/AppData/Local/Temp/chefspec20180413-11784-1dp9wh
rfile_cache_path\BESClient\installed.txt]

anyone help how to test this scenario?

Answer 1

By default chefspec sets a new temporary directory for file caching in every run which may not be existing in your machine. To avoid that we need to set file_cache_path. Unless this is specified your spec test will fail. You can set this in your spec_helper.rb file to avoid repetition in each spec file

RSpec.configure do |config|
  config.file_cache_path = Chef::Config[:file_cache_path]
end