--- /dev/null
+#!perl -w
+# Copyright (C) 2020 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+use strict;
+use PublicInbox::TestCommon;
+use Test::More;
+use Fcntl qw(:seek);
+use IO::Handle ();
+use POSIX qw(_exit);
+require_mods('PublicInbox::Gcf2');
+use_ok 'PublicInbox::Gcf2';
+my $gcf2 = PublicInbox::Gcf2::new();
+is(ref($gcf2), 'PublicInbox::Gcf2', '::new works');
+chomp(my $objdir = xqx([qw(git rev-parse --git-path objects)]));
+if ($objdir =~ /\A--git-path\n/) { # git <2.5
+ chomp($objdir = xqx([qw(git rev-parse --git-dir)]));
+ $objdir .= '/objects';
+ $objdir = undef unless -d $objdir;
+}
+
+my $COPYING = 'dba13ed2ddf783ee8118c6a581dbf75305f816a3';
+open my $agpl, '<', 'COPYING' or BAIL_OUT "AGPL-3 missing: $!";
+$agpl = do { local $/; <$agpl> };
+
+SKIP: {
+ skip 'not in git worktree', 15 unless defined($objdir);
+ $gcf2->add_alternate($objdir);
+ open my $fh, '+>', undef or BAIL_OUT "open: $!";
+ my $fd = fileno($fh);
+ $fh->autoflush(1);
+
+ $gcf2->cat_oid($fd, 'invalid');
+ seek($fh, 0, SEEK_SET) or BAIL_OUT "seek: $!";
+ is(do { local $/; <$fh> }, "invalid missing\n", 'got missing message');
+
+ seek($fh, 0, SEEK_SET) or BAIL_OUT "seek: $!";
+ $gcf2->cat_oid($fd, '0'x40);
+ seek($fh, 0, SEEK_SET) or BAIL_OUT "seek: $!";
+ is(do { local $/; <$fh> }, ('0'x40)." missing\n",
+ 'got missing message for 0x40');
+
+ seek($fh, 0, SEEK_SET) or BAIL_OUT "seek: $!";
+ $gcf2->cat_oid($fd, $COPYING);
+ my $buf;
+ my $ck_copying = sub {
+ my ($desc) = @_;
+ seek($fh, 0, SEEK_SET) or BAIL_OUT "seek: $!";
+ is(<$fh>, "$COPYING blob 34520\n", 'got expected header');
+ $buf = do { local $/; <$fh> };
+ is(chop($buf), "\n", 'got trailing \\n');
+ is($buf, $agpl, "AGPL matches ($desc)");
+ };
+ $ck_copying->('regular file');
+
+ $^O eq 'linux' or skip('pipe tests are Linux-only', 12);
+ my $size = -s $fh;
+ for my $blk (1, 0) {
+ my ($r, $w);
+ pipe($r, $w) or BAIL_OUT $!;
+ fcntl($w, 1031, 4096) or
+ skip('Linux too old for F_SETPIPE_SZ', 12);
+ $w->blocking($blk);
+ seek($fh, 0, SEEK_SET) or BAIL_OUT "seek: $!";
+ truncate($fh, 0) or BAIL_OUT "truncate: $!";
+ defined(my $pid = fork) or BAIL_OUT "fork: $!";
+ if ($pid == 0) {
+ close $w;
+ tick; # wait for parent to block on writev
+ $buf = do { local $/; <$r> };
+ print $fh $buf or _exit(1);
+ _exit(0);
+ }
+ $gcf2->cat_oid(fileno($w), $COPYING);
+ close $w or BAIL_OUT "close: $!";
+ is(waitpid($pid, 0), $pid, 'child exited');
+ is($?, 0, 'no error in child');
+ $ck_copying->("pipe blocking($blk)");
+
+ pipe($r, $w) or BAIL_OUT $!;
+ fcntl($w, 1031, 4096) or BAIL_OUT $!;
+ $w->blocking($blk);
+ close $r;
+ local $SIG{PIPE} = 'IGNORE';
+ eval { $gcf2->cat_oid(fileno($w), $COPYING) };
+ like($@, qr/writev error:/, 'got writev error');
+ }
+}
+
+if (my $nr = $ENV{TEST_LEAK_NR}) {
+ open my $null, '>', '/dev/null' or BAIL_OUT "open /dev/null: $!";
+ my $fd = fileno($null);
+ my $cat = $ENV{TEST_LEAK_CAT} // 10;
+ diag "checking for leaks... (TEST_LEAK_NR=$nr TEST_LEAK_CAT=$cat)";
+ local $SIG{PIPE} = 'IGNORE';
+ my ($r, $w);
+ pipe($r, $w);
+ close $r;
+ my $broken = fileno($w);
+ for (1..$nr) {
+ my $obj = PublicInbox::Gcf2::new();
+ if (defined($objdir)) {
+ $obj->add_alternate($objdir);
+ for (1..$cat) {
+ $obj->cat_oid($fd, $COPYING);
+ eval { $obj->cat_oid($broken, $COPYING) };
+ $obj->cat_oid($fd, '0'x40);
+ $obj->cat_oid($fd, 'invalid');
+ }
+ }
+ }
+}
+done_testing;