From: Wilson Bilkovich <wilsonb@...>
Date: 2007-09-27T11:18:32+09:00
Subject: Re: Syntax for .new ?

On 9/26/07, Larry Fast <lfast@mdsi.ca> wrote:
> Thank you all.  This version was all I needed:
>  Object.const_get(klass)
> I'm receiving only the child-class name with none of it's parentage.
>
> But now I'm trying to curious about how Test::Unit does this job. My
> first kick at this problem was to find out how it was done there.  I
> still haven't found anything that looks like Object instantiation in the
> Test::Unit code.
>

Test::Unit uses ObjectSpace *shiver* to do its work, at the moment.
In my opinion, a better way to do it would be:
class Test::Unit::TestCase
  def self.inherited(subclass)
    @test_cases ||= []
    @test_cases << subclass
  end
  def self.test_cases
    @test_cases || []
  end
end

That way it would collect up a list of classes as they were defined, and then:
at_exit do
  Test::Unit::TestCase.test_cases.each {|tc| tc.run_thyself }
end