From: Paul McMahon <pm@...>
Date: 2008-01-18T14:57:01+09:00
Subject: Re: Creating unit-test where RE required

You are using assert_raise improperly.  It should be

assert_raise(RuntimeError) do
   @search.run
end

see http://www.ruby-doc.org/core/classes/Test/Unit/Assertions.html#M006692