erofs-freebsd-out-tree/tests/TC026-dot-omitted-with.md

Test Case: Directory with dot_omitted

Test ID: TC026-dot-omitted-with

Objective

Verify a bit-4 directory omits only . on disk, retains explicit .., and receives a synthetic . from FreeBSD readdir.

Fixture

Use images/compact-dot-omitted.erofs. Structured evidence records bit 4, on-disk names ..,child.txt, 48-bit incompat selection with nonzero rootnid_8b, blocks_hi=0, and valid CRC. Production fsck.erofs 1.8.6 cannot qualify this newer format.

Procedure

After mounting in FreeBSD:

stat -f 'ino=%i nlink=%l mode=%p' "$mnt/dotdir"
ls -lai "$mnt/dotdir"
(cd "$mnt/dotdir" && test "$(pwd)" = "$mnt/dotdir")
cmp /tmp/repo22-g1/source/compact/dotdir/child.txt "$mnt/dotdir/child.txt"

Expected Results

• User-visible listing contains both . and ..; . has the directory NID.
• Structured evidence, not the listing, proves . is absent on disk and bit 4 is set; .. remains an on-disk entry.
• Child data, navigation, mount, and cleanup succeed.