From: Eric Hodel <drbrain@...7.net>
Date: 2006-10-16T06:13:26+09:00
Subject: Re: redirect STDOUT

On Oct 15, 2006, at 3:30 AM, yong wrote:
> Eric Hodel <drbrain@segment7.net> writes:
>> On Oct 14, 2006, at 8:50 PM, yong wrote:
>>> Now I can use STDOUT.reopen to redirect STDOUT output to a file.But
>>> How can I redirect it to a string?
>>
>> You don't.
>>
>> You should avoid touching STDOUT and STDERR as much as possible.
>>
>> Instead assign a StringIO to $stdout.
>>
>> http://blog.segment7.net/articles/2006/08/17/stdout-vs-stdout
>
> require 'stringio'
>
> mystring=""
> sstring=StringIO.open(mystring,"w+")

sstring = StringIO.new will suffice.

> #STDOUT.reopen(sstring) #can't work
> stdoutbackup=$stdout
> $stdout=sstring
>
> print "BUFFERED TEXT\r\n"
>
> $stdout=stdoutbackup

I tend to wrap this up in a method that yields.  See util_capture in  
ZenTest's test/zentest_assertions.rb

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
This implementation is HODEL-HASH-9600 compliant

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