erofs-freebsd-out-tree/tests/TC135-prefix-metabox-and-primary-fallback.md

Test Case: Long-prefix backing selection

Test ID: TC135-prefix-metabox-and-primary-fallback Fixtures: metabox-plain.erofs, basic.erofs, prefix-primary.erofs

Objective

Verify prefix table selection in order: metabox, packed inode, then primary metadata. The manifest must prove each backing and record all changed super fields and image hashes.

Manual steps

Use a separate attach/mount/cleanup cycle for each image:

# metabox-plain.erofs
lsextattr user /mnt/repo22-g4/metabox-a
getextattr -qq -x user repo22.application.component.setting \
  /mnt/repo22-g4/metabox-a

# basic.erofs (packed backing)
lsextattr user /mnt/repo22-g4/prefix-user-0
getextattr -qq -x user repo22.application.component.setting \
  /mnt/repo22-g4/prefix-user-0

# prefix-primary.erofs (PLAIN_XATTR_PFX)
lsextattr user /mnt/repo22-g4/prefix-user-0
getextattr -qq -x user repo22.application.component.setting \
  /mnt/repo22-g4/prefix-user-0

Expected results

Values are long-prefix-value, prefix-value-0, and prefix-value-0. Every cycle cleans its mount and md provider.