test(multiplayer): make local gate portable

scripts/test_verify_multiplayer_local.py

@@ -0,0 +1,19 @@
+from pathlib import Path
+import unittest
+
+
+ROOT = Path(__file__).parents[1]
+
+
+class LocalMultiplayerGateTest(unittest.TestCase):
+    def test_godot_gate_has_a_digest_pinned_container_fallback(self):
+        script = (ROOT / "scripts" / "verify_multiplayer_local.sh").read_text()
+        self.assertIn("run_godot_harness()", script)
+        self.assertIn("barichello/godot-ci@sha256:", script)
+        self.assertIn("docker run --rm --platform linux/amd64", script)
+        self.assertIn("type=bind,src=$root_dir,dst=/workspace", script)
+        self.assertIn("Godot executable not found", script)
+
+
+if __name__ == "__main__":
+    unittest.main()