module HostEnvironmentSimulatorHelper

def in_its_own_process_with(*files)
  if ::Process.respond_to?(:fork)
    pid = ::Process.fork do
      # Need to write coverage result under different name
      if defined?(SimpleCov)
        SimpleCov.command_name "rspec-fork-#{Process.pid}"
        SimpleCov.pid = Process.pid
      end
      files.each { |file| require file }
      yield
    end
    ::Process.wait(pid)
    # assert that the block did not fail
    expect($CHILD_STATUS).to be_success
  else
    warn 'Process.fork is not available.'
  end
end