test code v1

tests/TC074-inline-user-xattr-multiple.md

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+# Test Case: Multiple inline user xattrs
+
+**Test ID**: TC074-inline-user-xattr-multiple
+**Fixture**: `basic.erofs`, `/inline-multi`
+
+## Objective
+
+Verify list/get across several inline user entries, including embedded NUL and
+binary values. Qualify their inline offsets in `fixture-manifest.json` first.
+
+## Manual steps
+
+```sh
+lsextattr user /mnt/repo22-g4/inline-multi
+getextattr -qq -x user attr1 /mnt/repo22-g4/inline-multi
+getextattr -qq -x user attr2 /mnt/repo22-g4/inline-multi
+getextattr -qq -x user attr3 /mnt/repo22-g4/inline-multi
+stat -f 'mode=%Sp size=%z' /mnt/repo22-g4/inline-multi
+```
+
+## Expected results
+
+Names are `attr1`, `attr2`, `attr3`; values are `one`, `two\0binary`, and
+bytes `00` through `1f`. Unmount and detach.