Problems testing w/ seconds at runtime

I think the most promising approach is to "freeze" time for the
duration of the test. Various approaches have been discussed. I think
something like this would work well:

  http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/195144

Here's a similar approach of my own design:

  http://snippets.dzone.com/posts/show/4776