Gennady wrote:
> Does anybody know an easy way to test for a class/module existence in 
> Ruby? What I do is adding a method to ObjectSpace for this, so that I 
> can test it like:
>  
> require 'object-space'
>  
> if ObjectSpace.contain_class?("Test::Unit::TestCase")
>   # do something
> end

Why not just

   if defined?(Test::Unit::TestCase)

or, if you really want to check that it is a class:

   if defined?(Test::Unit::TestCase) && Test::Unit::TestCase.is_a?(Class)