From: Galevsky gal <galevsky@...>
Date: 2007-06-27T02:51:13+09:00
Subject: Re: Class instance into included module

Trans wrote:
> On Jun 26, 1:00 pm, Galevsky Gal <galev...@gmail.com> wrote:
>>   method_HelloWorld.call if iwant
>> Do you have any idea ? I cannot get my instance using self since self
>> means the module itself. How can I make a .call onto *parent* class
>> method ?
> 
> The way you have it paradoxical b/c "method_HelloWorld.call if iwant"
> is happening before an instance is ever created. BUt if you just men
> accessing Clas, then just put that:
> 
>    method_HelloWorld = Clas.instance_method('helloWorld')
> 
> However, Ruby has some limitations, in that a method needs to be bound
> to an instance. And binding is restricted to subclasses of the type of
> class the method was taken from. Unfortunate that. But usually one can
> find a way to manage. In your case you should ask "what am I trying to
> call an instance method outside of an instance? Maybe it should be a
> module method, which the instance can call upon instead.
> 
> T.

Thanks for your posts guys ;o)

Well, I am writting a light unit test framework, like Junit for java.

So, I have a TestModule module that deals with Tests objects, assertions 
and so on. The behaviour I want is:

Take a class:

Class AClass
 def method1
   "hello"
 end
end

To unit-test it, I would like to just need to write that:

Class TestAClass
 def TestMethod1
   assume(AClass.new.method,"hello")
 end

 include TestModule
end


To do that, my TestModule should be....


module TestModule

 class TestManager
  # handle a tests register, launches all the methods, handles the 
results, display info and so on

  def register(method)
     @register << method
  end

  def launch
    @register.each{ |test|
       test.call
    }
  end

  def testsSucceed?
     # handle lots stuff with assume() calls executed during the launch 
...
  end
 end


  # find all the methods of TestAClass that have 'Test' in their name, 
and add them into the register handled by the TestManager

  mgr = TestManager.new
  testing_instance = #here is my pb and I 'd like to get a TestAClass 
instance
  testing_instance.methods.each{ |method|
    if !(method =~ /Test/).nil?
      mgr.register(testing_instance.method(method))
    end
  }
  puts "launch All the registered tests"
  mgr.launch

end


I give you a shortened version but the necessary part to understand what 
I would like to do.

Thanks for your attention,

Gal'

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