Mocking out file contents in ChefSpec

Question

I have a chef cookbook which copies the ubutunu user's (default user of the amazon AMI am using) authorized keys file to a newly created user.

ubuntu_public_key_file = "/home/ubuntu/.ssh/authorized_keys"
file "#{new_user_homedir}/.ssh/authorized_keys" do
  owner new_user
  group new_user_group
  mode "0600"
  content IO.read(ubuntu_public_key_file)
end

Am trying out chefspec and I want to test this out. I want to mock the existence of ubuntu_public_key_file and its contents. Any feedback on this is appreciated!

Answer 1

You use RSpec stubs:

describe 'cookbook::recipe' do
  let(:content) do
    "CUSTOM SSH KEY CONTENT HERE"
  end

  before do
    IO.stub(:read).with('/home/ubuntu/.ssh/authorized_keys').and_return(content)
  end
end