# Test Case: Readdir - Multi-Block Completeness

**Test ID**: TC047-readdir-large
**Category**: Directory Operations
**Priority**: High

## Objective

Verify repeated small-buffer reads cover a 320-file multi-block directory
exactly once.

## Procedure

Mount metadata/namei-base.erofs and run:

    ./readdir_probe /tmp/repo22-g3/mnt/wide 128
    find /tmp/repo22-g3/mnt/wide -maxdepth 1 -type f |
      sed 's#.*/##' | sort > actual-wide.txt
    test "$(wc -l < actual-wide.txt)" -eq 320
    test "$(sort actual-wide.txt | uniq -d | wc -l)" -eq 0

Compare actual-wide.txt with fixtures/metadata/expected-wide.txt.

## Expected Results

The helper reports 322 unique entries and 322 valid restart positions with a
128-byte userspace buffer; the exact manifest has 320 names and no duplicates.
Record the probe hash and cleanup.