import: (v2) delete writes the blob into history in subdir

This makes it easier to audit deletes with "git log -p" and
prevents an unstable specification of "content_id" from being
stored in history.

This should be cost-free if done in the same partition (and even
cheaper than before as it introduces no new blobs).  It does
have a higher cost across partitions, but is probably irrelevant
given the typical ham:spam ratio.

1 files changed, 9 insertions, 0 deletions

diff --git a/t/v2writable.t b/t/v2writable.t
index 6e37b722..a5c982e9 100644
--- a/t/v2writable.t
+++ b/t/v2writable.t
@@ -191,6 +191,7 @@ EOF
 {
         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');
@@ -207,6 +208,14 @@ EOF
         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\td$!) {
+                my $oid = $1;
+                ok(index($before, $oid) > 0, 'no new blob introduced');
+        } else {
+                fail('failed to extract blob from log output');
+        }
 }
 
 done_testing();