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Test::More & interactive test

by pileofrogs (Priest)
on Jan 13, 2012 at 21:05 UTC ( #947829=perlquestion: print w/ replies, xml ) Need Help??
pileofrogs has asked for the wisdom of the Perl Monks concerning the following question:

Greetings Monks!

Yes, I know I shouldn't have interactive tests. I'll make them all automated or optional or something later. Maybe I'll use expect.

Basically, I'm writing some stuff that will alter user accounts on a system and send them email to tell them what it did. I want the script to run vi so I can review the email and make edits before it gets sent.

In the test harness, vi gets all confused because STDOUT isn't a tty. I can see the text to edit and I can close vi by typing "<esc>:q!" but I can't see the cursor or anything I type. No, this is not a surprise.

I think I need a way to tell the test harness to give me back the TTY for a minute, to stop looking for TAP and then start again.

If I run system("vi $filename") it behaves like I describe. If I run system("vi $filename >&2") it works great (vi still complains, but I don't care.) If I redirect STDOUT to STDERR and back in the test script, it doesn't help. I guess that's what you'd expect because STDOUT is already screwed with before I get there so redirecting it after the fact isn't going to help.

Anyway, is there a good way to handle this? I'm interested not only to solve my problem but also to improve my understanding of all these interacting filehandles and whatnot.

Here's the shortest script I could think of that shows the situation. Obviously you need 'vi' in your path.

use Test::More; use File::Temp qw(tempfile); my $text = 'hi there'; my ($fh,$fname) = tempfile(); print $fh $text; close($fh); ok(!system("vi $fname"),'vi exit OK'); open($fh,'<',$fname) || die "Failed to re-open $fname\n"; local $/; $text = <$fh>; close($fh); unlink($fname); done_testing();

Thanks All!
--Pileofrogs

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Re: Test::More & interactive test
by Perlbotics (Canon) on Jan 13, 2012 at 21:43 UTC

    Not a straight solution, but a simple workaround:

    ok( !system("xterm -e vi $fname") , 'vi exit OK');

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