From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-03-25T19:36:51+09:00
Subject: Re: Unit Testing : line by line ?

On Thu, Mar 25, 2010 at 10:37 AM, onion wushu <loic.lehenaff@gmail.com> wrote:
> Hi everybody !
>
> I would like to verify some properties in a method, line by line. For
> example:
>
> class Hello
>  def initialize
>    @a = "hi !"
>  end
>
>  def say_hi
>    @b = "hi !"
>    # checking here
>    @b = "hello !"
>    # another checking here
>  end
> end
>
> We could imagine that we would like to verify the properties @a==@b
> after the first declaration of @b and after the second one. Is there a
> way to handle this case with TestUnit ? Any other suggestions ?

The minimal unit for unit testing is a method. If you find the need to
unit test a part of the method that could be a sign that the method is
too complex and you should refactor it:

def say_hi
    process_some_stuff("hi!")
    process_other_stuff("hello!")
end

def process_some_stuff(value)
   @b = value
end

def process_other_stuff(value)
   @b = value
end

and you can unit test process_some_stuff and the other extracted
methods individually.

Jesus.