fix: lay a hash pack out as its emulator does

tests/test_md5_pack_context.py

@@ -50,5 +50,17 @@ class TheEmulatorContextIsChecked(unittest.TestCase):
         self.assertEqual(names, [])
 
 
+    def test_the_standalone_layout_reaches_a_profile_without_structure(self):
+        """BBKEmu has no pack_structure; its A4980 8.BIN goes to
+        system/BBKEmu/A4980/ standalone. The hash pack kept the bare name,
+        then, once laid out, sent it to the A4988 folder whose entry shares
+        the name."""
+        md5 = "ddfc001a6859d63ed46368ea7fe9f20c"
+        if not any(record.get("md5") == md5 for record in self.db["files"].values()):
+            self.skipTest("the A4980 8.BIN is not collected")
+        proc, names = _pack("--from-md5", md5, "--emulator", "bbkemu", "--standalone")
+        self.assertEqual(proc.returncode, 0, proc.stderr)
+        self.assertEqual(names, ["system/BBKEmu/A4980/8.BIN"])
+
 if __name__ == "__main__":
     unittest.main()