From: Daniel N <has.sox@...>
Date: 2006-11-06T23:48:47+09:00
Subject: Include and Extend Again....

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Hi all,

I must be really thick with this because I cannot get my class to behave.

What I want to do is

class AClass
  include AModule
end

and have that module mixin both instance and class methods.  I've seen this
done, but obviously I don't understand what's really going on because I
can't make it happen.  I know this has been discussed on the list before as
well.  I've reviewed that as well.  I fell really thick with this one.  It's
just not going in.

Here's what I've tried  (don't worry it's short).  I put this into a single
file and just run it.  Any pointers to the source of my misunderstanding
would be great.

Thanx

module A

  def self.included(base)
    base.extend ClassMethods
    base.send( :include, InstanceMethods )
  end

  module InstanceMethods
    def b
      puts "I'm an instance method"
    end
  end

  module ClassMethods
    def a
      puts "I'm a class method"
    end
  end

end

  class Object
     include  A
  end


  require 'test/unit'

  class MyModuleTest < Test::Unit::TestCase
    def test_object_should_have_the_a_method_as_class_method
      assert Object.respond_to?( :a )
    end

    def test_object_should_not_have_the_a_method_as_instance_method
      assert !Object.new.respond_to?( :a )
    end

    def test_object_should_have_the_b_method_as_instance_method
      assert Object.new.respond_to?( :b )
    end

    def test_object_should_not_have_the_b_method_as_class_method
      assert !Object.respond_to?( :b )
    end
  end

  require 'test/unit/ui/console/testrunner'
  Test::Unit::UI::Console::TestRunner.run(MyModuleTest)

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