test code v1

tests/TC047-readdir-large.md

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+# 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.