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tests/TC072-shared-system-xattr-list.md

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+# Test Case: List the FreeBSD system namespace
+
+**Test ID**: TC072-shared-system-xattr-list
+**Fixture**: `basic.erofs`
+
+## Objective
+
+Verify that trusted, security, and POSIX ACL indexes are listed only through
+FreeBSD namespace `system` with their ABI names.
+
+## Manual steps
+
+```sh
+lsextattr system /mnt/repo22-g4/trusted-shared-a
+lsextattr system /mnt/repo22-g4/security-shared-a
+lsextattr system /mnt/repo22-g4/acl-unordered
+lsextattr user /mnt/repo22-g4/trusted-shared-a
+stat -f '%HT %Sp' /mnt/repo22-g4/trusted-shared-a \
+  /mnt/repo22-g4/security-shared-a /mnt/repo22-g4/acl-unordered
+```
+
+## Expected results
+
+The three system lists contain `trusted.config`, `security.selinux`, and
+`posix_acl_access`, respectively. The trusted file's user list is empty.
+Unmount and detach.