Comments on: Capturing Output from PUTS in Ruby

By: Jeremy Woertink

Jeremy Woertink — Wed, 03 Aug 2011 22:24:20 +0000

This is used in Thor.


def capture(stream)
    begin
      stream = stream.to_s
      eval "$#{stream} = StringIO.new"
      yield
      result = eval("$#{stream}").string
    ensure
      eval("$#{stream} = #{stream.upcase}")
    end

    result
end

By: Stuart Corbishley

Stuart Corbishley — Tue, 26 Jul 2011 12:22:29 +0000

Thanks! This is insanely useful!

By: Matt

Matt — Thu, 12 Aug 2010 20:53:58 +0000

Thank you! Your elegant capture_stdout method was exactly what I needed for testing the “trace” feature of a little embedded interpreter I’m working on.

By: Albert

Albert — Sun, 02 May 2010 18:33:30 +0000

Very helpful, thanks! I’m testing a debug function that only “puts” when in a Rack application is in development mode.

By: Derek Hammer

Derek Hammer — Tue, 02 Mar 2010 07:02:57 +0000

Thanks! This has really helped me out. I really hate saying things like “I can’t test this.”