fix: read platform hashes as verify does in PR checks

tests/test_validate_pr_hashes.py

@@ -0,0 +1,39 @@
+"""validate_pr knows every revision a platform accepts.
+
+It read the platform YAMLs raw: a Recalbox md5 field "a,b,c" stayed one
+value, so a pull request adding the seventh falcon.img Recalbox lists was
+answered "hash differs, may be a variant". Inheritance and shared groups
+were lost the same way.
+"""
+
+from __future__ import annotations
+
+import sys
+import unittest
+from pathlib import Path
+
+import yaml
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT / "scripts"))
+
+
+class EveryAcceptedRevisionIsKnown(unittest.TestCase):
+    def test_multi_hash_members_are_known(self):
+        import validate_pr
+
+        known = validate_pr.load_platform_hashes(str(REPO_ROOT / "platforms"))
+        raw = yaml.safe_load((REPO_ROOT / "platforms" / "recalbox.yml").read_text())
+        listed = [
+            value.strip().lower()
+            for system in raw["systems"].values()
+            for entry in system.get("files", [])
+            if "," in str(entry.get("md5", ""))
+            for value in str(entry["md5"]).split(",")
+        ]
+        self.assertTrue(listed)
+        self.assertEqual([v for v in listed if v not in known["md5"]], [])
+
+
+if __name__ == "__main__":
+    unittest.main()