How to stub a custom puppet function in every spec test?

[Martin Alfke]

Hi,

we use a custom function (extlib::read_url) which we want to stub for every profile and role class unit test.

We tried using before within Spec.configure:

RSpec.configure do |c|
c.before :each do
Puppet::Functions.create_function(:'profile::read_url') do
dispatch :read_url do
param 'Stdlib::HTTPUrl', :url
return_type 'String'
end
def read_url(url)
'ssh-rsa AAAAAAAAAzuozgouzvouzvf== us...@domain.tld'
end
end
end
end

When stubbing the function in spec_helper_local.rb file, we must add the dispatch and the def.

But the test still use the original function.

I also tried “overloading” the function in a spec/fixtures/override_modules directory.
Unit tests still take the original function.

Even adding shared_context is not working.

Has anyone an idea, on how to solve this.
I don’t want to add the function stub (which works flawlessly) into every class unit test.

This is a working example where we stub inside the class unit test:
require 'spec_helper'

describe 'profile::base::user_accounts' do
on_supported_os.each do |os, os_facts|
context "on #{os}" do
let(:facts) { os_facts }
Puppet::Functions.create_function(:'profile::read_url') do
return 'ssh-rsa AAAAAAAAAzuozgouzvouzvf== us...@domain.tld'
end

it { is_expected.to compile }
end
end
end

Best,
Martin

[Nick Bertrand]

Hi Martin,

Using rspec-puppet's pre_condition seems to work for me:

RSpec.shared_context "read_url stub" do
  let (:pre_condition) do
  '
    function profile::read_url(String $arg) >> String {

      return "ssh-rsa AAAAAAAAAzuozgouzvouzvf== us...@domain.tld"
    }
  '
  end

end

RSpec.configure do |c|
  c.include_context "read_url stub"
end

HTH,

Nick

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[Martin Alfke]

Hi Nick,

This is working as expected.

Many thanks for the fix.

Martin

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