Since has_threadid predates the existence of ExtSearch, we can
be certain the Xapian DB can collapse by threadid.
run_script(['-index', "$home/v1test"]) or BAIL_OUT "index $?";
ok(run_script([qw(-extindex --all), "$home/extindex"]), 'extindex init');
-
+{
+ my $es = PublicInbox::ExtSearch->new("$home/extindex");
+ ok($es->has_threadid, '->has_threadid');
+}
{ # TODO: -extindex should write this to config
open $fh, '>>', $cfg_path or BAIL_OUT $!;