From: Dave Thomas <Dave@...>
Date: 2001-02-28T14:06:43+09:00
Subject: [ruby-talk:11742] Re: Subclasses of a Class?

Ron Jeffries <ronjeffries@acm.org> writes:

> I'm wanting to set up RubyUnit to automatically run all the suites of
> all the subclasses of RUNIT::TestCase, but there doesn't seem to be a
> way to get all subclasses of a class ... or I can't find it.
> 
> Is there? What is it? Or is there another way to get all the suites?

Ron:

You can add support to RUNIT::TestCase using the 'inherited' method
(http://www.rubycentral.com/book/ref_c_class.html#inherited)
like this:

   class TestCase
      @@subclasses = []
      def TestCase.inherited(by)
          @@subclasses << by
      end

      def TestCase.subclasses
        @@subclasses
     end 
   end

   class B < TestCase; end
   class C < TestCase; end
   class D < B; end
   class E; end

   p TestCase.subclasses   #=>  [B, C, D]


(I cheated and called this example TestCase because I didn't drag
RUnit in).


Regards


Dave