+ my $es = PublicInbox::ExtSearch->new($d);
+ ok(my $nresult0 = $es->mset('z:0..')->size, 'got results');
+ ok(ref($es->{xdb}), '{xdb} created');
+ my $nshards1 = $es->{nshard};
+ is($nshards1, 1, 'correct shard count');
+ my $xdb_str = "$es->{xdb}";
+ ok($es->cleanup_shards, 'cleanup_shards noop');
+ is("$es->{xdb}", $xdb_str, '{xdb} unchanged');
+