1 files changed, 16 insertions, 0 deletions
diff --git a/t/pop3d_lock.t b/t/pop3d_lock.t
new file mode 100644
index 00000000..fb305f96
--- /dev/null
+++ b/t/pop3d_lock.t
@@ -0,0 +1,16 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+use v5.12;
+use PublicInbox::TestCommon;
+require_mods(qw(DBD::SQLite Net::POP3 :fcntl_lock));
+use autodie;
+my $tmpdir = tmpdir;
+require_ok 'PublicInbox::POP3D';
+my $pop3d = bless {}, 'PublicInbox::POP3D';
+open $pop3d->{txn_fh}, '+>>', "$tmpdir/txn.lock";
+use Fcntl qw(F_SETLK F_UNLCK F_WRLCK);
+
+ok $pop3d->_setlk(l_type => F_WRLCK, l_start => 9, l_len => 1),
+        'locked file (check with ktrace/strace)';
+
+done_testing;