serverspec(rspec) :if example

example.rb

require 'spec_helper'

def exist?(filename)
  File.exist?(filename)
end

def bigger_than?(filename,size)
  File.size?(filename) >= size
end

describe file('/etc/hosts'), :if => exist?('/etc/hosts') do
  it('', :if => bigger_than?('/etc/hosts',100)) { should contain '127.0.0.1' }
end