test code v1

tests/TC046-readdir-basic.md

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+# Test Case: Readdir - Basic Completeness
+
+**Test ID**: TC046-readdir-basic
+**Category**: Directory Operations
+**Priority**: Critical
+
+## Objective
+
+Verify one complete getdirentries(2)/readdir(3) traversal returns the exact
+fixture set, including dot and dotdot.
+
+## Procedure
+
+Mount vfs/vfs-plain.erofs and run:
+
+    ./readdir_probe /tmp/repo22-g3/mnt/testdir 4096
+    find /tmp/repo22-g3/mnt/testdir -maxdepth 1 -mindepth 1 -print |
+      sed 's#.*/##' | sort > actual-testdir.txt
+    cmp fixtures/vfs/expected-testdir.txt actual-testdir.txt
+
+## Expected Results
+
+The manifest comparison is exact; the probe reports 36 unique entries and the
+same ordered name/type hash through both APIs. Record the image hash and
+cleanup.