From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-11-21T23:19:59+09:00
Subject: Re: select only taking alternating values?

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Brian Candler:

> Incidentally, a plain gets is *not* the same as STDIN.gets, but is
> more like ARGF.gets. It makes a difference when someone puts some
> arguments on the command line. Use STDIN.gets to be safe.

Or, better yet, use $stdin.gets =E2=80=93 IMHO in general it=E2=80=99s bett=
er to use the
global variables ($stdin, $stdout, $stderr) rather than the constants
(STDIN, STDOUT, STDERR), because you can repoint the variables as you
see fit without generating a Ruby warning.

For example, when specing my =E2=80=98executable=E2=80=99 classes with RSpe=
c,
I often want to specify that something should show up on the
standard error, and I usually do something like this:



module Signore describe Executable do

  before do
    @orig_stderr =3D $stderr
    $stderr =3D StringIO.new
  end

  after do
    $stderr =3D @orig_stderr
  end

  def stderr
    $stderr.rewind
    $stderr.read
  end

  it 'should print usage if no command was given' do
    lambda { Executable.new([]) }.should raise_error SystemExit
    stderr.should match /usage: signore prego\|pronto \[label, =E2=80=A6\]/
  end

  # =E2=80=A6

end end



=E2=80=94 Shot
--=20
a :message to you, Ruby

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