> From: Massimiliano Mirra [mailto:list / NOSPAMchromatic-harp.com] 
>> I don't see any obvious assertion in Test::Unit that allows 
>> checking of I/O to $stdout/$stderr.  What's a good way to
>> test for such a case?
> 
> 
> Get stringio.rb from www.allruby.com/rpkg/stringio.rb
> 

Massimiliano --

  Thanks for the suggestion!  I have installed stringio.rb but am having
problems with the redir method.  I get 'uninitialized stream' errors in both
my code and your unit tests, on many flavors of Ruby (windows/linux, 1.6.5
through 1.7.2):

% ruby-latest -v /users/jgray/pkgs/ruby/lib/stringio.rb
ruby 1.7.2 (2002-06-04) [i686-linux]
Loaded suite /users/jgray/pkgs/ruby/lib/stringio
Started...
...............
Error occurred in test_redirect(TestStringIO): IOError: uninitialized stream
        /users/jgray/pkgs/ruby/lib/stringio.rb:133:in `redir'
        /users/jgray/pkgs/ruby/lib/stringio.rb:151:in `test_redirect'
        /users/jgray/pkgs/ruby/lib/stringio.rb:265
..
Finished in 0.04797999999999999 seconds.
16 runs, 25 assertions, 0 failures, 1 errors

The context in stringio.rb:
   131          begin
   132                  $defout, $stderr = redout, rederr
=> 133                  $stdout = redout
   134                  yield
   135          ensure

  Any ideas what might be happening?

  Thanks,

    - jeff