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tests: test terminal output to both stdout and stderr

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Some outputs (like the pager) care whether stdout is a
terminal. Others (like progress meters) care about stderr.

This patch sets up both. Technically speaking, we could go
further and set up just one (because either the other goes
to a terminal, or because our tests are only interested in
one). This patch does both to keep the interface to
lib-terminal simple.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2010-10-17 02:36:57 +08:00 committed by Junio C Hamano
parent cc4e48fc1e
commit e23f436c35
2 changed files with 28 additions and 11 deletions
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8
t/lib-terminal.sh
View file

@ -1,19 +1,19 @@
#!/bin/sh
test_expect_success 'set up terminal for tests' '
if test -t 1
if test -t 1 && test -t 2
then
>stdout_is_tty
>have_tty
elif
test_have_prereq PERL &&
"$PERL_PATH" "$TEST_DIRECTORY"/test-terminal.perl \
sh -c "test -t 1"
sh -c "test -t 1 && test -t 2"
then
>test_terminal_works
fi
'
if test -e stdout_is_tty
if test -e have_tty
then
test_terminal() { "$@"; }
test_set_prereq TTY

31
t/test-terminal.perl
View file

@ -4,14 +4,15 @@
use IO::Pty;
use File::Copy;
# Run @$argv in the background with stdout redirected to $out.
# Run @$argv in the background with stdio redirected to $out and $err.
sub start_child {
my ($argv, $out) = @_;
my ($argv, $out, $err) = @_;
my $pid = fork;
if (not defined $pid) {
die "fork failed: $!"
} elsif ($pid == 0) {
open STDOUT, ">&", $out;
open STDERR, ">&", $err;
close $out;
exec(@$argv) or die "cannot exec '$argv->[0]': $!"
}
@ -47,12 +48,28 @@ sub xsendfile {
copy($in, $out, 4096) or $!{EIO} or die "cannot copy from child: $!";
}
sub copy_stdio {
my ($out, $err) = @_;
my $pid = fork;
defined $pid or die "fork failed: $!";
if (!$pid) {
close($out);
xsendfile(\*STDERR, $err);
exit 0;
}
close($err);
xsendfile(\*STDOUT, $out);
finish_child($pid) == 0
or exit 1;
}
if ($#ARGV < 1) {
die "usage: test-terminal program args";
}
my $master = new IO::Pty;
my $slave = $master->slave;
my $pid = start_child(\@ARGV, $slave);
close $slave;
xsendfile(\*STDOUT, $master);
my $master_out = new IO::Pty;
my $master_err = new IO::Pty;
my $pid = start_child(\@ARGV, $master_out->slave, $master_err->slave);
close $master_out->slave;
close $master_err->slave;
copy_stdio($master_out, $master_err);
exit(finish_child($pid));