From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-08-11T23:21:11+09:00
Subject: Re: Manual Test::Unit and popen's require space

On Thu, 11 Aug 2005, Trans wrote:

> Hi, I'm trying to manully run unit test using Test::Unit because I need
> to isolate certain requires from others in the
> course of the tests. Certain files I'm testing can potentially cause
> conflits with others, so I need to run them in isolation. But I still
> want to tally the tests/assertions/errors, etc. So I'm wondering if I'm
> doing this right. Specifically, is popen("-", "w+") giving me a whole
> seperate "require space" to utilize?
>
> Here's my code so far:
>
>    def fork_test( testfile )
>      result = nil
>      IO.popen("-","w+") do |pipe|
>        result = pipe.instance_eval do
>          require 'test/unit'
>          require 'test/unit/collector'
>          require 'test/unit/collector/objectspace'
>          require 'test/unit/ui/testrunnermediator'
>          load( testfile )
>          tests = Test::Unit::Collector::ObjectSpace.new.collect
>          runner = Test::Unit::UI::TestRunnerMediator.new( tests )
>          runner.run_suite
>        end
>      end
>      p result
>      result
>    end
>
> Thanks,
> T.

i think you'll want to open up a pipe to the ruby interpreter and send a
program to it - forking will not give you a clean require space:

   jib:~ > cat a.rb
   require 'yaml'

   src = <<-src
     puts( require('yaml') ? 'required yaml' : 'already had yaml' )
   src

   #
   # via child
   #
   stdout =
     IO::popen('-', 'r+') do |child|
       if child
         child.puts src
         child.close_write
         child.read
       else
         eval STDIN.read
       end
     end
   puts "child - stdout <#{ stdout.strip }>"

   #
   # via ruby
   #
   stdout =
     IO::popen('ruby', 'r+') do |ruby|
       ruby.puts src
       ruby.close_write
       ruby.read
     end
   puts "ruby - stdout <#{ stdout.strip }>"


   jib:~ > ruby a.rb
   child - stdout <already had yaml>
   ruby - stdout <required yaml>

hth.

-a
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