chore: file pc-88 roms under pc-88

tests/test_nec_filing.py

@@ -0,0 +1,49 @@
+"""PC-88 ROMs live in the PC-88 folder.
+
+Sixteen ROMs that only quasi88 reads (N88EXT0-3, N88KNJ1, N88SUB, the n88
+set, the disk subsystem ROM, pc88.rom) were stored under bios/NEC/PC-98,
+and the site linked the nec-pc-88 system to the PC-98 page. A file in the
+PC-98 folder must have a reader whose systems include the PC-98, or be one
+no PC-88 emulator reads. Reads the repository.
+"""
+
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT / "scripts"))
+
+PC98 = {"pc-98", "nec-pc-98"}
+PC88 = {"nec-pc-88", "nec-pc-80"}
+
+
+class PC88FilesStayInPC88(unittest.TestCase):
+    def test_no_pc88_only_file_under_pc98(self):
+        folder = REPO_ROOT / "bios" / "NEC" / "PC-98"
+        if not folder.is_dir():
+            self.skipTest("bios/NEC/PC-98 is absent")
+        from common import load_emulator_profiles
+
+        readers: dict[str, set[str]] = {}
+        for profile in load_emulator_profiles(str(REPO_ROOT / "emulators")).values():
+            systems = {str(s) for s in profile.get("systems") or []}
+            for entry in profile.get("files") or []:
+                if not isinstance(entry, dict):
+                    continue
+                for name in [entry.get("name", ""), *(entry.get("aliases") or [])]:
+                    readers.setdefault(str(name).lower(), set()).update(systems)
+        misfiled = sorted(
+            path.name for path in folder.iterdir()
+            if path.is_file()
+            and readers.get(path.name.lower())
+            and readers[path.name.lower()] <= PC88
+        )
+        self.assertEqual(misfiled, [])
+        self.assertFalse((folder / "pc88.rom").exists())
+
+
+if __name__ == "__main__":
+    unittest.main()