From: Simon Strandgaard <qj5nd7l02@...>
Date: 2003-11-17T10:21:51+09:00
Subject: overload method in module_eval,  how?

I want to overload a testcase method with debug-enabling wrapper.
But it doesn't seems like my Object#debug method gets called at all.

Any ideas how to do this ?

--
Simon Strandgaard


server> ruby test_dbg.rb
Loaded suite TestDbg
Started
F
Finished in 0.008819 seconds.

  1) Failure:
default_test(TestDbg) [test_dbg.rb:31]:
No tests were specified.

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

class Object
  def self.debug(*args)
    args.each{|method| 
      name = method.id2name
      org = "_debug_"+name
      code=<<MSG
      alias #{org} #{name}
      def #{name}(*a,&b)
        $stdout.puts("before")
        #{org}(*a,&b) 
        $stdout.puts("after") 
      end
      private :#{org}
MSG
      module_eval code
    }
  end
end

class TestDbg < Test::Unit::TestCase
  def test_x
    assert_equal(true, true)
  end
  debug :test_x  # uncomment me, and it works!
end

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