use warnings;
use Test::More;
use File::Temp qw/tempdir/;
+use Compress::Zlib qw(compress);
foreach my $mod (qw(DBD::SQLite)) {
eval "require $mod";
plan skip_all => "$mod missing for over.t" if $@;
$y = $over->create_ghost('NEVAR');
is($y, $x + 1, 'integer tid for ghost increases');
+my $ddd = compress('');
+foreach my $s ('', undef) {
+ $over->add_over([0, 98, [ 'a' ], [], $s, $ddd]);
+ $over->add_over([0, 99, [ 'b' ], [], $s, $ddd]);
+ my $msgs = [ map { $_->{num} } @{$over->get_thread('a')} ];
+ is_deeply([98], $msgs,
+ 'messages not linked by empty subject');
+}
+
+$over->add_over([0, 98, [ 'a' ], [], 's', $ddd]);
+$over->add_over([0, 99, [ 'b' ], [], 's', $ddd]);
+foreach my $mid (qw(a b)) {
+ my $msgs = [ map { $_->{num} } @{$over->get_thread('a')} ];
+ is_deeply([98, 99], $msgs, 'linked messages by subject');
+}
+$over->add_over([0, 98, [ 'a' ], [], 's', $ddd]);
+$over->add_over([0, 99, [ 'b' ], ['a'], 'diff', $ddd]);
+foreach my $mid (qw(a b)) {
+ my $msgs = [ map { $_->{num} } @{$over->get_thread($mid)} ];
+ is_deeply([98, 99], $msgs, "linked messages by Message-ID: <$mid>");
+}
+
+$over->rollback_lazy;
+
done_testing();