test code v1

tests/TC056-getattr-special.md

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+# Test Case: getattr Special Files
+
+**Test ID**: TC056-getattr-special
+**Category**: Vnode Operations
+**Priority**: Critical
+
+## Objective
+
+Verify compact and extended char, block, and FIFO inodes expose exact types,
+device numbers, zero size/allocation, and stable generation.
+
+## Procedure
+
+On fresh mounts of metadata/special-compact.erofs and
+metadata/special-extended.erofs:
+
+    ./stat_special char /tmp/repo22-g3/mnt/char-large 2748 344865
+    ./stat_special block /tmp/repo22-g3/mnt/block-large 2748 344865
+    ./stat_special fifo /tmp/repo22-g3/mnt/fifo
+    stat -f 'name=%N type=%HT size=%z blocks=%b gen=%v' \
+      /tmp/repo22-g3/mnt/char-large \
+      /tmp/repo22-g3/mnt/block-large \
+      /tmp/repo22-g3/mnt/fifo
+
+## Expected Results
+
+All type/rdev probes pass; each special inode has size and st_blocks zero and
+a nonzero generation. Record both fixture hashes and clean each mount/md.