From: Simon Strandgaard <qj5nd7l02@...>
Date: 2003-11-17T10:22:14+09:00
Subject: Re: overload method in module_eval,  how?

On Mon, 10 Nov 2003 13:47:46 +0100, ts wrote:

>>>>>> "S" == Simon Strandgaard <qj5nd7l02@sneakemail.com> writes:
> 
> S> Though, now I don't understand why my example didn't work?
> 
>  Because the new method that you have defined was
> 
>     def test_x(*a, b)
>     end
> 
>  This give an arity -1, and runit reject these methods it keep only methods
>  with a zero arity
> 
> 
> S> How to make it general so it works for an arbitrary number of arguments ?
> 
>  You *can't* give an arbitrary number of arguments for a test method

DrainBammage, thats obvious. Thanks.

BTW: I wonder why the last "p instance_methods" doesn't output anything?

--
Simon Strandgaard

server> ruby test_dbg.rb
["test_x"]
Loaded suite test_dbg
Started
..
Finished in 0.002346 seconds.

1 tests, 1 assertions, 0 failures, 0 errors
server> expand -t2 test_dbg.rb 
require 'test/unit'

class Object
  def self.debug(*args)
    p instance_methods(false)
    args.each{|method| 
      name = method.id2name
      org = "_debug_"+name
      arguments = (method.arity > 0) ? "(*a,&b)" : "(&b)"
      code=<<MSG
      alias #{org} #{name}
      def #{name}#{arguments}
        $stdout.puts("before")
        #{org}#{arguments}
        $stdout.puts("after") 
      end
      private :#{org}
MSG
      module_eval code
    }
    p instance_methods(false)  # No output, why ?
  end
end

class TestDbg < Test::Unit::TestCase
  def test_x
    assert_equal(true, true)
  end
  debug :test_x
end

if $0 == __FILE__
  require 'test/unit/ui/console/testrunner'
  Test::Unit::UI::Console::TestRunner.run(TestDbg)
end
server>