+{
+ ok($im->add($mime), 'add message to be purged');
+ local $SIG{__WARN__} = sub {};
+ ok(my $cmts = $im->purge($mime), 'purged message');
+ like($cmts->[0], qr/\A[a-f0-9]{40}\z/, 'purge returned current commit');
+ $im->done;
+
+ # again
+ is($im->purge($mime), undef, 'no-op returns undef');
+}
+
+{
+ my $x = 'x'x250;
+ my $y = 'y'x250;
+ local $SIG{__WARN__} = sub {};
+ $mime->header_set('Subject', 'long mid');
+ $mime->header_set('Message-ID', "<$x>");
+ ok($im->add($mime), 'add excessively long Message-ID');
+
+ $mime->header_set('Message-ID', "<$y>");
+ $mime->header_set('References', "<$x>");
+ ok($im->add($mime), 'add excessively long References');
+ $im->barrier;
+
+ my $msgs = $ibx->search->{over_ro}->get_thread('x'x244);
+ is(2, scalar(@$msgs), 'got both messages');
+ is($msgs->[0]->{mid}, 'x'x244, 'stored truncated mid');
+ is($msgs->[1]->{references}, '<'.('x'x244).'>', 'stored truncated ref');
+ is($msgs->[1]->{mid}, 'y'x244, 'stored truncated mid(2)');
+ $im->done;
+}
+