# Test Case: Lookup - Case Sensitivity

**Test ID**: TC045-lookup-case-sensitive
**Category**: Directory Operations
**Priority**: High

## Objective

Verify four distinct case variants resolve independently and an unrecorded
case variant returns ENOENT.

## Procedure

Mount vfs/vfs-plain.erofs and run:

    stat -f 'name=%N ino=%i size=%z' \
      /tmp/repo22-g3/mnt/testdir/file.txt \
      /tmp/repo22-g3/mnt/testdir/File.txt \
      /tmp/repo22-g3/mnt/testdir/FILE.TXT \
      /tmp/repo22-g3/mnt/testdir/FiLe.TxT
    ./g3_vfs_probe expect-error stat \
      /tmp/repo22-g3/mnt/testdir/fILE.txt 2

## Expected Results

The four exact variants have four nonzero, distinct NIDs and their recorded
sizes. The unmatched spelling returns errno 2. Record output and cleanup.