From: Robert Klemme <shortcutter@...>
Date: 2009-12-24T21:45:08+09:00
Subject: Re: How to test an iterator method

On 12/24/2009 01:14 AM, Edgardo Hames wrote:
> Hi guys,
> 
> I have a class that looks like this
> 
> class MyClass
>   def each_object
>     # do something really fun
>   end
> end
> 
> I'd like to write some tests for the #each_object method but don't
> know how to. Could you please suggest a way to test methods that
> iterate over the elements of a collection?

Depends on what you want to check.  If for example you want to make sure 
elements are returned in the proper order you can do something like this:

class X
   include Test::Unit::Assertions

   def test_a
     v = 1..5
     expect = [1,2,3,4,5]

     v.each do |x|
       assert_equal expect.shift, x
     end
   end
end

This is of course just a silly test but should demonstrate the point.

Kind regards

	robert


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