From: Farrel Lifson <farrel.lifson@...>
Date: 2006-11-30T23:12:23+09:00
Subject: Re: Test::Unit and drb

On 30/11/06, Damphyr <damphyr@freemail.gr> wrote:
> Anybody have any tips to share about unit testing code that uses drb?
>
> My problem is, I can test all the the logic in smaller chunks, but as
> soon as I integrate everyhting and have code in place that verifies and
> recovers from connection errors I need to at least establish that drb
> connection.
>
> How would I go about doing this in a unit test environment?
> Getting a mock drb server in a thread and launching it in setup seems
> too clunky.
> Any brilliant ideas?
> Cheers,
> V.-
> --
> http://www.braveworld.net/riva
>
>

This is how I've done it though if anyone has better solutions I'd be
glad to hear them:

require 'drb'
require 'test/unit'

class Counter
  def initialize;@counter = 0;end
  def count;@counter+=1;end

  def self.start
    DRb.start_service("druby://localhost:9000",self.new)
  end

  def stop
    DRb.stop_service
  end
end

class TC_Counter < Test::Unit::TestCase
  def setup
    @t = Thread.new do
      Counter.start
    end
    @counter = DRbObject.new_with_uri("druby://localhost:9000")
  end

  def teardown
    @counter.stop
    @t.exit
  end

  def test_count
    assert_equal(1,@counter.count)
    assert_equal(2,@counter.count)
    assert_equal(3,@counter.count)
  end
end