From: Morton Goldberg <m_goldberg@...>
Date: 2008-01-03T11:53:02+09:00
Subject: Re: Dynamically add a method to a TestCase


On Jan 2, 2008, at 1:55 PM, Achim Domma wrote:

> Hi,
>
> I'm experimenting with the dynamic features of ruby to add methods to
> a TestCase. Here is my test script:
>
> require 'watir'
> require 'test/unit'
>
> class MyTest < Test::Unit::TestCase
> end
>
> for num in ["a","b","c"]
>     MyTest.send(:define_method,"test_" + num) {
>         assert(false,"->"+num)
>     }
> end
>
> It works fine so far, but all asserts display "->c" as error message.
> I don't understand why! Any hint? How to fix it?


One way to fix it is to use eval rather then send:

<code>
require 'test/unit'

class MyTest < Test::Unit::TestCase
    for ch in %w[a b c]
       eval %[define_method("test_#{ch}") { assert(false, "->#{ch}") }]
    end
end
</code>

Regards, Morton