+
+ my $set = eml_load('t/plack-qp.eml');
+ $set->header_set('Message-ID', "<set\@$parallel>");
+ my $ret = $lst->set_eml($set, 'seen');
+ is(ref $ret, 'PublicInbox::Smsg', 'initial returns smsg');
+ my $ids = $lst->set_eml($set, qw(seen));
+ is_deeply($ids, [ $ret->{num} ], 'set_eml idempotent');
+ $ids = $lst->set_eml($set, qw(seen answered));
+ is_deeply($ids, [ $ret->{num} ], 'set_eml to change kw');
+ $lst->done;
+ @kw = $lst->search->msg_keywords($ids->[0]);
+ is_deeply(\@kw, [qw(answered seen)], 'set changed kw');
+}
+
+SKIP: {
+ require_mods(qw(Storable), 1);
+ ok($lst->can('ipc_do'), 'ipc_do works if we have Storable');
+ $eml->header_set('Message-ID', '<ipc-test@example>');
+ my $pid = $lst->ipc_worker_spawn('lei-store');
+ ok($pid > 0, 'got a worker');
+ my $smsg = $lst->ipc_do('set_eml', $eml, qw(seen));
+ is(ref($smsg), 'PublicInbox::Smsg', 'set_eml works over ipc');
+ my $ids = $lst->ipc_do('set_eml', $eml, qw(seen));
+ is_deeply($ids, [ $smsg->{num} ], 'docid returned');
+
+ $eml->header_set('Message-ID');
+ my $no_mid = $lst->ipc_do('set_eml', $eml, qw(seen));
+ my $wait = $lst->ipc_do('done');
+ my @kw = $lst->search->msg_keywords($no_mid->{num});
+ is_deeply(\@kw, [qw(seen)], 'ipc set changed kw');
+
+ is(ref($smsg), 'PublicInbox::Smsg', 'no mid works ipc');
+ $ids = $lst->ipc_do('set_eml', $eml, qw(seen));
+ is_deeply($ids, [ $no_mid->{num} ], 'docid returned w/o mid w/ ipc');
+ $lst->ipc_do('done');
+ $lst->ipc_worker_stop;
+ $ids = $lst->ipc_do('set_eml', $eml, qw(seen answered));
+ is_deeply($ids, [ $no_mid->{num} ], 'docid returned w/o mid w/o ipc');
+ $wait = $lst->ipc_do('done');
+ @kw = $lst->search->msg_keywords($no_mid->{num});
+ is_deeply(\@kw, [qw(answered seen)], 'set changed kw w/o ipc');