How to test an iterator method

ruby-talk
1

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?

Thanks,
Edgardo

2

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

···

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?

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/