Add haa vendor extensions (#59750)

Co-authored-by: J. Nick Koston <nick@koston.org>

tests/components/homekit_controller/test_button.py

@@ -0,0 +1,45 @@
+"""Basic checks for HomeKit button."""
+from aiohomekit.model.characteristics import CharacteristicsTypes
+from aiohomekit.model.services import ServicesTypes
+
+from tests.components.homekit_controller.common import Helper, setup_test_component
+
+
+def create_switch_with_setup_button(accessory):
+    """Define setup button characteristics."""
+    service = accessory.add_service(ServicesTypes.OUTLET)
+
+    setup = service.add_char(CharacteristicsTypes.Vendor.HAA_SETUP)
+
+    setup.value = ""
+    setup.format = "string"
+
+    cur_state = service.add_char(CharacteristicsTypes.ON)
+    cur_state.value = True
+
+    return service
+
+
+async def test_press_button(hass):
+    """Test a switch service that has a button characteristic is correctly handled."""
+    helper = await setup_test_component(hass, create_switch_with_setup_button)
+
+    # Helper will be for the primary entity, which is the outlet. Make a helper for the button.
+    energy_helper = Helper(
+        hass,
+        "button.testdevice_setup",
+        helper.pairing,
+        helper.accessory,
+        helper.config_entry,
+    )
+
+    outlet = energy_helper.accessory.services.first(service_type=ServicesTypes.OUTLET)
+    setup = outlet[CharacteristicsTypes.Vendor.HAA_SETUP]
+
+    await hass.services.async_call(
+        "button",
+        "press",
+        {"entity_id": "button.testdevice_setup"},
+        blocking=True,
+    )
+    assert setup.value == "#HAA@trcmd"