Testing an Ohai Plugin generated from Template using burtlo/chefspec-ohai to test

default.rb

# recipes/default.rb
ohai_plugin 'consul' do
  resource :template
  variables config_var: node['my_cookbook']['some_important_var']
end

my_plugin.rb

# templates/default/my_plugin.rb
Ohai.plugin :MyPlugin do
  provides 'my_plugin/foo'

  def some_config_var
    '<%= @config_var %>'
  end

  collect_data :default do
    my_plugin Mash.new
    consul[:path] = some_config_var
  end
end

my_plugin_spec.rb

# spec/unit/ohai_plugins/my_plugin_spec.rb
require 'spec_helper'
require 'tempfile'
require 'erb'

@config_var = 'Go see a Star War!'
temp_file = Tempfile.new('foo')
# temp_file = 'test/integration/default/ohai_plugins/my_plugin_rendered.rb'
template = ERB.new(File.read('templates/default/my_plugin.rb')).result
File.write(temp_file, template)

describe_ohai_plugin :MyPlugin do
  let(:plugin_file) { temp_file }
  # Do tests here as normal
end