fw_versions: type annotate test_brand_ecu_matches (#31272)

* test this

* we

selfdrive/car/fw_versions.py

@@ -201,12 +201,12 @@ def get_present_ecus(logcan, sendcan, num_pandas=1) -> Set[EcuAddrBusType]:
   return ecu_responses
 
 
-def get_brand_ecu_matches(ecu_rx_addrs):
+def get_brand_ecu_matches(ecu_rx_addrs: Set[EcuAddrBusType]) -> dict[str, set[AddrType]]:
   """Returns dictionary of brands and matches with ECUs in their FW versions"""
 
   brand_addrs = {brand: config.get_all_ecus(VERSIONS[brand], include_ecu_type=False) for
                  brand, config in FW_QUERY_CONFIGS.items()}
-  brand_matches = {brand: set() for brand, _, _ in REQUESTS}
+  brand_matches: dict[str, set[AddrType]] = {brand: set() for brand, _, _ in REQUESTS}
 
   brand_rx_offsets = {(brand, r.rx_offset) for brand, _, r in REQUESTS}
   for addr, sub_addr, _ in ecu_rx_addrs:

selfdrive/car/tests/test_fw_fingerprint.py

@@ -11,7 +11,7 @@ from cereal import car
 from openpilot.selfdrive.car.car_helpers import interfaces
 from openpilot.selfdrive.car.fingerprints import FW_VERSIONS
 from openpilot.selfdrive.car.fw_versions import FW_QUERY_CONFIGS, FUZZY_EXCLUDE_ECUS, VERSIONS, build_fw_dict, \
-                                                match_fw_to_car, get_fw_versions, get_present_ecus
+                                                match_fw_to_car, get_brand_ecu_matches, get_fw_versions, get_present_ecus
 from openpilot.selfdrive.car.vin import get_vin
 
 CarFw = car.CarParams.CarFw
@@ -178,6 +178,14 @@ class TestFwFingerprint(unittest.TestCase):
           self.assertFalse(request_obj.auxiliary and request_obj.bus == 1 and request_obj.obd_multiplexing,
                            f"{brand.title()}: OBD multiplexed request is marked auxiliary: {request_obj}")
 
+  def test_brand_ecu_matches(self):
+    empty_response = {brand: set() for brand in FW_QUERY_CONFIGS}
+    self.assertEqual(get_brand_ecu_matches(set()), empty_response)
+
+    # we ignore bus
+    expected_response = empty_response | {'toyota': {(0x750, 0xf)}}
+    self.assertEqual(get_brand_ecu_matches({(0x758, 0xf, 99)}), expected_response)
+
 
 class TestFwFingerprintTiming(unittest.TestCase):
   N: int = 5