bench test updates

tests/test_serial_scenario.py

@@ -0,0 +1,50 @@
+import io
+import json
+import tempfile
+import unittest
+from pathlib import Path
+
+from h8536.serial_scenario import DEFAULT_ACK_FRAME, DEFAULT_ACK_TARGET, main
+
+
+class SerialScenarioTest(unittest.TestCase):
+    def test_dry_run_summarizes_ack_aware_table_sweep(self):
+        scenario = {
+            "name": "unit-sweep",
+            "steps": [
+                {
+                    "action": "table_sweep",
+                    "start": "0x000",
+                    "count": "0x002",
+                    "gap": 0.75,
+                    "ack_on": {
+                        "frames": ["07 80 40 20 90 2D"],
+                        "ack_frame": "05 00 40 00 00 1F",
+                        "max_acks": 8,
+                        "max_target_hits": 32,
+                    },
+                }
+            ],
+        }
+        with tempfile.TemporaryDirectory() as tmpdir:
+            path = Path(tmpdir) / "scenario.json"
+            path.write_text(json.dumps(scenario), encoding="utf-8")
+            stdout = io.StringIO()
+
+            exit_code = main([str(path), "--dry-run"], stdout=stdout)
+
+        output = stdout.getvalue()
+        self.assertEqual(exit_code, 0)
+        self.assertIn("scenario=unit-sweep", output)
+        self.assertIn("selectors=2 first=0x000 last=0x001", output)
+        self.assertIn("ack_target=07 80 40 20 90 2D", output)
+        self.assertIn("ack_frame=05 00 40 00 00 1F", output)
+        self.assertIn("max_acks=8 max_target_hits=32", output)
+
+    def test_default_ack_frames_match_current_rom_probe_candidate(self):
+        self.assertEqual(DEFAULT_ACK_TARGET, bytes.fromhex("07804020902D"))
+        self.assertEqual(DEFAULT_ACK_FRAME, bytes.fromhex("05004000001F"))
+
+
+if __name__ == "__main__":
+    unittest.main()