stub_command with node attribute variables

Question

I've google around, it appears this can be done, but I'm just doing it wrong apparently.

So I'm trying to run this snippet of powershell_script:

powershell_script 'Unzip' do
  code <<-EOH
  Expand-Archive -Path 'E:\\apache-tomee-1.7.4-plus.zip' -DestinationPath "E:\\#{node['COOKBOOK']['Product']}-#{node['COOKBOOK']['Region']}-" + count.to_s.rjust(2, "0")"
  EOH
  guard_interpreter :powershell_script
  not_if "Test-Path -Path E:\\#{node['COOKBOOK']['Product']}-#{node['COOKBOOK']['Region']}-01"
end

Now those node attributes are set in attributes default.rb

default['COOKBOOK']['Product'] = 'product'
default['COOKBOOK']['Region'] = 'region'

I'm having a problem getting from there to what's supposed to be in the spec file.

require 'spec_helper'
describe 'COOKBOOK::default' do
  context 'when all attributes are default, on Windows 2012R2' do
    let(:chef_run) do
      # for a complete list of available platforms and versions see:
      # https://github.com/customink/fauxhai/blob/master/PLATFORMS.md
      runner = ChefSpec::ServerRunner.new(platform: 'windows', version: '2012R2')
      runner.converge(described_recipe)
    end
    it 'converges successfully' do
      stub_command('Test-Path -Path E:\\#{node['COOKBOOK']['Product']}-#{node['COOKBOOK']['Region']}-01').and_return(true)
      expect { chef_run }.to_not raise_error
    end
  end
end

Can anyone give me a hand?

Thanks in advance.

Are you getting an error? What exactly is the problem? – Brandon Miller Jun 11 '18 at 18:45 — Brandon Miller, Jun 11 '18 at 18:45

Brandon Miller · Answer 1 · 2018-06-11T19:24:47.770

First, you have an issue with the stub_command line. You have the line surrounded with single quotes so those interpolations for attributes aren't going to work, so surround the thing in double quotes:

stub_command("Test-Path -Path E:\\#{node['COOKBOOK']['Product']}-#{node['COOKBOOK']['Region']}-01").and_return(true)

Now you will get this error:

 NameError:
   undefined local variable or method `node' for #<RSpec::ExampleGroups::ExampleSoDefault::WhenAllAttributesAreDefaultOnWindows2012R2:0x0000000004066720>

Your node attributes aren't available in your rspec tests. In additon, rspec recognizes your not_if with attributes already replaced, like this:

not_if "Test-Path -Path E:\\product-region-01"

So you need to stub that command, like follows:

require 'spec_helper'
describe 'example-so::default' do
  context 'when all attributes are default, on Windows 2012R2' do
    let(:chef_run) do
      # for a complete list of available platforms and versions see:
      # https://github.com/customink/fauxhai/blob/master/PLATFORMS.md
      runner = ChefSpec::ServerRunner.new(platform: 'windows', version: '2012R2')
      runner.converge(described_recipe)
    end
    it 'converges successfully' do
      stub_command('Test-Path -Path E:\\product-region-01').and_return(true)
      expect { chef_run }.to_not raise_error
    end
  end
end

If you need to test for multiple different attribute settings you can set attributes appropriately and run tests for each set of conditions.

stub_command with node attribute variables

1 Answers1