# Test Case: Repeated Positive Lookup Behavior

**Test ID**: TC051-namecache-hit
**Category**: VFS Integration
**Priority**: High

## Objective

Verify repeated positive pathname lookups remain stable within one mount.
This is behavior-level namecache integration coverage; timing differences do
not prove an internal cache hit.

## Procedure

Mount vfs/vfs-plain.erofs and run:

    stat -f 'ino=%i mode=%p size=%z gen=%v' \
      /tmp/repo22-g3/mnt/testdir/file.txt > TC051-first.txt
    stat -f 'ino=%i mode=%p size=%z gen=%v' \
      /tmp/repo22-g3/mnt/testdir/file.txt > TC051-second.txt
    cmp TC051-first.txt TC051-second.txt
    cmp fixtures/vfs/source/testdir/file.txt \
      /tmp/repo22-g3/mnt/testdir/file.txt

## Expected Results

Both lookups succeed with byte-identical metadata and data. Record only this
observable behavior as PASS; do not claim a measured cache hit without kernel
instrumentation. Record output and cleanup.