#ruby IRC example of a spec for jason479's code

jason479.rb

require 'etc'

module Needs
  class << self
    def root
      raise('try with doas') unless Process.uid.zero?
    end

    def release(number)
      raise('you need an OpenBSD system') unless openbsd?
      raise("only OpenBSD #{number} is supported") unless version?(number)
    end

    private

    def openbsd?
      Etc.uname[:sysname] == 'OpenBSD'
    end

    def version?(version)
      Etc.uname[:release] == version
    end
  end
end

require 'minitest/autorun'

describe Needs do
  describe '#root' do
    describe 'a non-zero process id' do
      it 'raises an error' do
        Process.stub :uid, 42 do
          error = assert_raises { Needs.root }
          assert_equal error.message, 'try with doas'
        end
      end
    end

    describe 'a process id of zero' do
      it 'does nothing' do
        Process.stub :uid, 0 do
          assert_nil Needs.root
        end
      end
    end
  end
end