require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper")) class Timeval < FFI::Struct layout :tv_sec, :ulong, 0, :tv_usec, :ulong, 4 end describe FFI::Struct do it "allows setting fields" do t = Timeval.new t[:tv_sec] = 12 t[:tv_sec].should == 12 end end