+{
+ local $ENV{NPROC} = 2;
+ my @before = $git0->qx(qw(log --pretty=oneline));
+ my $before = $git0->qx(qw(log --pretty=raw --raw -r --no-abbrev));
+ $im = PublicInbox::V2Writable->new($ibx, 1);
+ is($im->{partitions}, 1, 'detected single partition from previous');
+ my $smsg = $im->remove($mime, 'test removal');
+ my @after = $git0->qx(qw(log --pretty=oneline));
+ $im->done;
+ my $tip = shift @after;
+ like($tip, qr/\A[a-f0-9]+ test removal\n\z/s,
+ 'commit message propaged to git');
+ is_deeply(\@after, \@before, 'only one commit written to git');
+ is($ibx->mm->num_for($smsg->mid), undef, 'no longer in Msgmap by mid');
+ like($smsg->num, qr/\A\d+\z/, 'numeric number in return message');
+ is($ibx->mm->mid_for($smsg->num), undef, 'no longer in Msgmap by num');
+ my $srch = $ibx->search->reopen;
+ my @found = ();
+ $srch->each_smsg_by_mid($smsg->mid, sub { push @found, @_; 1 });
+ is(scalar(@found), 0, 'no longer found in Xapian skeleton');
+
+ my $after = $git0->qx(qw(log -1 --pretty=raw --raw -r --no-abbrev));
+ if ($after =~ m!( [a-f0-9]+ )A\t_/D$!) {
+ my $oid = $1;
+ ok(index($before, $oid) > 0, 'no new blob introduced');
+ } else {
+ fail('failed to extract blob from log output');
+ }
+ is($im->remove($mime, 'test removal'), undef,
+ 'remove is idempotent');
+ $im->done;
+ is($git0->qx(qw(log -1 --pretty=raw --raw -r --no-abbrev)),
+ $after, 'no git history made with idempotent remove');
+ eval { $im->done };
+ ok(!$@, '->done is idempotent');
+}
+
+{
+ ok($im->add($mime), 'add message to be purged');
+ local $SIG{__WARN__} = sub {};
+ ok($im->purge($mime), 'purged message');
+ $im->done;
+}