Address review feedback: round setpoints and fix test docstring

A zone in COOL mode should never report HEATING and vice versa.
Also adds tests for empty protocol fields and cool mode temperature.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

homeassistant/components/trane/__init__.py

@@ -8,14 +8,16 @@ from steamloop import (
     ThermostatConnection,
 )
 
-from homeassistant.const import CONF_HOST
+from homeassistant.const import CONF_HOST, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
 from homeassistant.helpers import device_registry as dr
 
-from .const import CONF_SECRET_KEY, DOMAIN, MANUFACTURER, PLATFORMS
+from .const import CONF_SECRET_KEY, DOMAIN, MANUFACTURER
 from .types import TraneConfigEntry
 
+PLATFORMS = [Platform.CLIMATE, Platform.SWITCH]
+
 
 async def async_setup_entry(hass: HomeAssistant, entry: TraneConfigEntry) -> bool:
     """Set up Trane Local from a config entry."""

homeassistant/components/trane/climate.py

@@ -0,0 +1,200 @@
+"""Climate platform for the Trane Local integration."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from steamloop import FanMode, HoldType, ThermostatConnection, ZoneMode
+
+from homeassistant.components.climate import (
+    ATTR_TARGET_TEMP_HIGH,
+    ATTR_TARGET_TEMP_LOW,
+    ClimateEntity,
+    ClimateEntityFeature,
+    HVACAction,
+    HVACMode,
+)
+from homeassistant.const import ATTR_TEMPERATURE, UnitOfTemperature
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+
+from .entity import TraneZoneEntity
+from .types import TraneConfigEntry
+
+PARALLEL_UPDATES = 0
+
+HA_TO_ZONE_MODE = {
+    HVACMode.OFF: ZoneMode.OFF,
+    HVACMode.HEAT: ZoneMode.HEAT,
+    HVACMode.COOL: ZoneMode.COOL,
+    HVACMode.HEAT_COOL: ZoneMode.AUTO,
+    HVACMode.AUTO: ZoneMode.AUTO,
+}
+
+ZONE_MODE_TO_HA = {
+    ZoneMode.OFF: HVACMode.OFF,
+    ZoneMode.HEAT: HVACMode.HEAT,
+    ZoneMode.COOL: HVACMode.COOL,
+    ZoneMode.AUTO: HVACMode.AUTO,
+}
+
+HA_TO_FAN_MODE = {
+    "auto": FanMode.AUTO,
+    "on": FanMode.ALWAYS_ON,
+    "circulate": FanMode.CIRCULATE,
+}
+
+FAN_MODE_TO_HA = {v: k for k, v in HA_TO_FAN_MODE.items()}
+
+SINGLE_SETPOINT_MODES = frozenset({ZoneMode.COOL, ZoneMode.HEAT})
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: TraneConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up Trane Local climate entities."""
+    conn = config_entry.runtime_data
+    async_add_entities(
+        TraneClimateEntity(conn, config_entry.entry_id, zone_id)
+        for zone_id in conn.state.zones
+    )
+
+
+class TraneClimateEntity(TraneZoneEntity, ClimateEntity):
+    """Climate entity for a Trane thermostat zone."""
+
+    _attr_name = None
+    _attr_translation_key = "zone"
+    _attr_fan_modes = list(HA_TO_FAN_MODE)
+    _attr_supported_features = (
+        ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
+        | ClimateEntityFeature.FAN_MODE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
+    )
+    _attr_temperature_unit = UnitOfTemperature.FAHRENHEIT
+    _attr_target_temperature_step = 1.0
+
+    def __init__(self, conn: ThermostatConnection, entry_id: str, zone_id: str) -> None:
+        """Initialize the climate entity."""
+        super().__init__(conn, entry_id, zone_id, "zone")
+        modes: list[HVACMode] = []
+        for zone_mode in conn.state.supported_modes:
+            ha_mode = ZONE_MODE_TO_HA.get(zone_mode)
+            if ha_mode is None:
+                continue
+            modes.append(ha_mode)
+            # AUTO in steamloop maps to both AUTO (schedule) and HEAT_COOL (manual hold)
+            if zone_mode == ZoneMode.AUTO:
+                modes.append(HVACMode.HEAT_COOL)
+        self._attr_hvac_modes = modes
+
+    @property
+    def current_temperature(self) -> float | None:
+        """Return the current temperature."""
+        # indoor_temperature is a string from the protocol (e.g. "72.00")
+        # or empty string if not yet received
+        if temp := self._zone.indoor_temperature:
+            return float(temp)
+        return None
+
+    @property
+    def current_humidity(self) -> int | None:
+        """Return the current humidity."""
+        # relative_humidity is a string from the protocol (e.g. "45")
+        # or empty string if not yet received
+        if humidity := self._conn.state.relative_humidity:
+            return int(humidity)
+        return None
+
+    @property
+    def hvac_mode(self) -> HVACMode:
+        """Return the current HVAC mode."""
+        zone = self._zone
+        if zone.mode == ZoneMode.AUTO and zone.hold_type == HoldType.MANUAL:
+            return HVACMode.HEAT_COOL
+        return ZONE_MODE_TO_HA.get(zone.mode, HVACMode.OFF)
+
+    @property
+    def hvac_action(self) -> HVACAction:
+        """Return the current HVAC action."""
+        # heating_active and cooling_active are system-level strings from the
+        # protocol ("0"=off, "1"=idle, "2"=running); filter by zone mode so
+        # a zone in COOL never reports HEATING and vice versa
+        zone_mode = self._zone.mode
+        if zone_mode == ZoneMode.OFF:
+            return HVACAction.OFF
+        state = self._conn.state
+        if zone_mode != ZoneMode.HEAT and state.cooling_active == "2":
+            return HVACAction.COOLING
+        if zone_mode != ZoneMode.COOL and state.heating_active == "2":
+            return HVACAction.HEATING
+        return HVACAction.IDLE
+
+    @property
+    def target_temperature(self) -> float | None:
+        """Return target temperature for single-setpoint modes."""
+        # Setpoints are strings from the protocol or empty string if not yet received
+        zone = self._zone
+        if zone.mode == ZoneMode.COOL:
+            return float(zone.cool_setpoint) if zone.cool_setpoint else None
+        if zone.mode == ZoneMode.HEAT:
+            return float(zone.heat_setpoint) if zone.heat_setpoint else None
+        return None
+
+    @property
+    def target_temperature_high(self) -> float | None:
+        """Return the upper bound target temperature."""
+        zone = self._zone
+        if zone.mode in SINGLE_SETPOINT_MODES:
+            return None
+        return float(zone.cool_setpoint) if zone.cool_setpoint else None
+
+    @property
+    def target_temperature_low(self) -> float | None:
+        """Return the lower bound target temperature."""
+        zone = self._zone
+        if zone.mode in SINGLE_SETPOINT_MODES:
+            return None
+        return float(zone.heat_setpoint) if zone.heat_setpoint else None
+
+    @property
+    def fan_mode(self) -> str:
+        """Return the current fan mode."""
+        return FAN_MODE_TO_HA.get(self._conn.state.fan_mode, "auto")
+
+    async def async_set_hvac_mode(self, hvac_mode: HVACMode) -> None:
+        """Set the HVAC mode."""
+        if hvac_mode == HVACMode.OFF:
+            self._conn.set_zone_mode(self._zone_id, ZoneMode.OFF)
+            return
+
+        hold_type = HoldType.SCHEDULE if hvac_mode == HVACMode.AUTO else HoldType.MANUAL
+        self._conn.set_temperature_setpoint(self._zone_id, hold_type=hold_type)
+
+        self._conn.set_zone_mode(self._zone_id, HA_TO_ZONE_MODE[hvac_mode])
+
+    async def async_set_temperature(self, **kwargs: Any) -> None:
+        """Set target temperature."""
+        heat_temp = kwargs.get(ATTR_TARGET_TEMP_LOW)
+        cool_temp = kwargs.get(ATTR_TARGET_TEMP_HIGH)
+        set_temp = kwargs.get(ATTR_TEMPERATURE)
+
+        if set_temp is not None:
+            if self._zone.mode == ZoneMode.COOL:
+                cool_temp = set_temp
+            elif self._zone.mode == ZoneMode.HEAT:
+                heat_temp = set_temp
+
+        self._conn.set_temperature_setpoint(
+            self._zone_id,
+            heat_setpoint=str(round(heat_temp)) if heat_temp is not None else None,
+            cool_setpoint=str(round(cool_temp)) if cool_temp is not None else None,
+        )
+
+    async def async_set_fan_mode(self, fan_mode: str) -> None:
+        """Set the fan mode."""
+        self._conn.set_fan_mode(HA_TO_FAN_MODE[fan_mode])

homeassistant/components/trane/config_flow.py

@@ -25,8 +25,6 @@ STEP_USER_DATA_SCHEMA = vol.Schema(
 class TraneConfigFlow(ConfigFlow, domain=DOMAIN):
     """Handle a config flow for Trane Local."""
 
-    VERSION = 1
-
     async def async_step_user(
         self, user_input: dict[str, Any] | None = None
     ) -> ConfigFlowResult:

homeassistant/components/trane/const.py

@@ -1,11 +1,7 @@
 """Constants for the Trane Local integration."""
 
-from homeassistant.const import Platform
-
 DOMAIN = "trane"
 
-PLATFORMS = [Platform.SWITCH]
-
 CONF_SECRET_KEY = "secret_key"
 
 MANUFACTURER = "Trane"

homeassistant/components/trane/strings.json

@@ -25,6 +25,19 @@
     }
   },
   "entity": {
+    "climate": {
+      "zone": {
+        "state_attributes": {
+          "fan_mode": {
+            "state": {
+              "auto": "[%key:common::state::auto%]",
+              "circulate": "Circulate",
+              "on": "[%key:common::state::on%]"
+            }
+          }
+        }
+      }
+    },
     "switch": {
       "hold": {
         "name": "Hold"

tests/components/trane/conftest.py

@@ -1,13 +1,14 @@
 """Fixtures for the Trane Local integration tests."""
 
-from collections.abc import Generator
+from collections.abc import AsyncGenerator, Generator
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 from steamloop import FanMode, HoldType, ThermostatState, Zone, ZoneMode
 
+from homeassistant.components.trane import PLATFORMS
 from homeassistant.components.trane.const import CONF_SECRET_KEY, DOMAIN
-from homeassistant.const import CONF_HOST
+from homeassistant.const import CONF_HOST, Platform
 from homeassistant.core import HomeAssistant
 
 from tests.common import MockConfigEntry
@@ -31,6 +32,19 @@ def mock_config_entry() -> MockConfigEntry:
     )
 
 
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Platforms, which should be loaded during the test."""
+    return PLATFORMS
+
+
+@pytest.fixture(autouse=True)
+async def mock_patch_platforms(platforms: list[Platform]) -> AsyncGenerator[None]:
+    """Fixture to set up platforms for tests."""
+    with patch(f"homeassistant.components.{DOMAIN}.PLATFORMS", platforms):
+        yield
+
+
 def _make_state() -> ThermostatState:
     """Create a mock thermostat state."""
     return ThermostatState(
@@ -49,6 +63,8 @@ def _make_state() -> ThermostatState:
         supported_modes=[ZoneMode.OFF, ZoneMode.AUTO, ZoneMode.COOL, ZoneMode.HEAT],
         fan_mode=FanMode.AUTO,
         relative_humidity="45",
+        heating_active="0",
+        cooling_active="0",
     )
 
 

tests/components/trane/snapshots/test_climate.ambr

@@ -0,0 +1,89 @@
+# serializer version: 1
+# name: test_climate_entities[climate.living_room-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': dict({
+      'fan_modes': list([
+        'auto',
+        'on',
+        'circulate',
+      ]),
+      'hvac_modes': list([
+        <HVACMode.OFF: 'off'>,
+        <HVACMode.AUTO: 'auto'>,
+        <HVACMode.HEAT_COOL: 'heat_cool'>,
+        <HVACMode.COOL: 'cool'>,
+        <HVACMode.HEAT: 'heat'>,
+      ]),
+      'max_temp': 95,
+      'min_temp': 45,
+      'target_temp_step': 1.0,
+    }),
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'climate',
+    'entity_category': None,
+    'entity_id': 'climate.living_room',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'object_id_base': None,
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': None,
+    'platform': 'trane',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': <ClimateEntityFeature: 395>,
+    'translation_key': 'zone',
+    'unique_id': 'test_entry_id_1_zone',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_climate_entities[climate.living_room-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'current_humidity': 45,
+      'current_temperature': 72,
+      'fan_mode': 'auto',
+      'fan_modes': list([
+        'auto',
+        'on',
+        'circulate',
+      ]),
+      'friendly_name': 'Living Room',
+      'hvac_action': <HVACAction.IDLE: 'idle'>,
+      'hvac_modes': list([
+        <HVACMode.OFF: 'off'>,
+        <HVACMode.AUTO: 'auto'>,
+        <HVACMode.HEAT_COOL: 'heat_cool'>,
+        <HVACMode.COOL: 'cool'>,
+        <HVACMode.HEAT: 'heat'>,
+      ]),
+      'max_temp': 95,
+      'min_temp': 45,
+      'supported_features': <ClimateEntityFeature: 395>,
+      'target_temp_high': 76,
+      'target_temp_low': 68,
+      'target_temp_step': 1.0,
+      'temperature': None,
+    }),
+    'context': <ANY>,
+    'entity_id': 'climate.living_room',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'heat_cool',
+  })
+# ---

tests/components/trane/test_climate.py

@@ -0,0 +1,335 @@
+"""Tests for the Trane Local climate platform."""
+
+from unittest.mock import MagicMock
+
+import pytest
+from steamloop import FanMode, HoldType, ZoneMode
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.climate import (
+    ATTR_FAN_MODE,
+    ATTR_HVAC_MODE,
+    ATTR_TARGET_TEMP_HIGH,
+    ATTR_TARGET_TEMP_LOW,
+    DOMAIN as CLIMATE_DOMAIN,
+    SERVICE_SET_FAN_MODE,
+    SERVICE_SET_HVAC_MODE,
+    SERVICE_SET_TEMPERATURE,
+    HVACAction,
+    HVACMode,
+)
+from homeassistant.const import (
+    ATTR_ENTITY_ID,
+    ATTR_TEMPERATURE,
+    SERVICE_TURN_OFF,
+    SERVICE_TURN_ON,
+    Platform,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+from homeassistant.util.unit_system import US_CUSTOMARY_SYSTEM
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Platforms, which should be loaded during the test."""
+    return [Platform.CLIMATE]
+
+
+@pytest.fixture(autouse=True)
+def set_us_customary(hass: HomeAssistant) -> None:
+    """Set US customary unit system for Trane (Fahrenheit thermostats)."""
+    hass.config.units = US_CUSTOMARY_SYSTEM
+
+
+@pytest.mark.usefixtures("entity_registry_enabled_by_default")
+async def test_climate_entities(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    snapshot: SnapshotAssertion,
+    entity_registry: er.EntityRegistry,
+) -> None:
+    """Snapshot all climate entities."""
+    await snapshot_platform(hass, entity_registry, snapshot, init_integration.entry_id)
+
+
+async def test_hvac_mode_auto(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test HVAC mode is AUTO when following schedule."""
+    mock_connection.state.zones["1"].hold_type = HoldType.SCHEDULE
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get("climate.living_room")
+    assert state is not None
+    assert state.state == HVACMode.AUTO
+
+
+async def test_current_temperature_not_available(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test current temperature is None when not yet received."""
+    mock_connection.state.zones["1"].indoor_temperature = ""
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get("climate.living_room")
+    assert state is not None
+    assert state.attributes["current_temperature"] is None
+
+
+async def test_current_humidity_not_available(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test current humidity is omitted when not yet received."""
+    mock_connection.state.relative_humidity = ""
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get("climate.living_room")
+    assert state is not None
+    assert "current_humidity" not in state.attributes
+
+
+async def test_set_hvac_mode_off(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test setting HVAC mode to off."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_HVAC_MODE,
+        {ATTR_ENTITY_ID: "climate.living_room", ATTR_HVAC_MODE: HVACMode.OFF},
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_not_called()
+    mock_connection.set_zone_mode.assert_called_once_with("1", ZoneMode.OFF)
+
+
+@pytest.mark.parametrize(
+    ("hvac_mode", "expected_hold", "expected_zone_mode"),
+    [
+        (HVACMode.AUTO, HoldType.SCHEDULE, ZoneMode.AUTO),
+        (HVACMode.HEAT_COOL, HoldType.MANUAL, ZoneMode.AUTO),
+        (HVACMode.HEAT, HoldType.MANUAL, ZoneMode.HEAT),
+        (HVACMode.COOL, HoldType.MANUAL, ZoneMode.COOL),
+    ],
+)
+async def test_set_hvac_mode(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_connection: MagicMock,
+    hvac_mode: HVACMode,
+    expected_hold: HoldType,
+    expected_zone_mode: ZoneMode,
+) -> None:
+    """Test setting HVAC mode."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_HVAC_MODE,
+        {ATTR_ENTITY_ID: "climate.living_room", ATTR_HVAC_MODE: hvac_mode},
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_called_once_with(
+        "1", hold_type=expected_hold
+    )
+    mock_connection.set_zone_mode.assert_called_once_with("1", expected_zone_mode)
+
+
+async def test_set_temperature_range(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test setting temperature range in heat_cool mode."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_TEMPERATURE,
+        {
+            ATTR_ENTITY_ID: "climate.living_room",
+            ATTR_TARGET_TEMP_LOW: 65,
+            ATTR_TARGET_TEMP_HIGH: 78,
+        },
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_called_once_with(
+        "1",
+        heat_setpoint="65",
+        cool_setpoint="78",
+    )
+
+
+async def test_set_temperature_single_heat(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test setting single temperature in heat mode."""
+    mock_connection.state.zones["1"].mode = ZoneMode.HEAT
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_TEMPERATURE,
+        {
+            ATTR_ENTITY_ID: "climate.living_room",
+            ATTR_TEMPERATURE: 70,
+        },
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_called_once_with(
+        "1",
+        heat_setpoint="70",
+        cool_setpoint=None,
+    )
+
+
+async def test_set_temperature_single_cool(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test setting single temperature in cool mode."""
+    mock_connection.state.zones["1"].mode = ZoneMode.COOL
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_TEMPERATURE,
+        {
+            ATTR_ENTITY_ID: "climate.living_room",
+            ATTR_TEMPERATURE: 78,
+        },
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_called_once_with(
+        "1",
+        heat_setpoint=None,
+        cool_setpoint="78",
+    )
+
+
+@pytest.mark.parametrize(
+    ("fan_mode", "expected_fan_mode"),
+    [
+        ("auto", FanMode.AUTO),
+        ("on", FanMode.ALWAYS_ON),
+        ("circulate", FanMode.CIRCULATE),
+    ],
+)
+async def test_set_fan_mode(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_connection: MagicMock,
+    fan_mode: str,
+    expected_fan_mode: FanMode,
+) -> None:
+    """Test setting fan mode."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_SET_FAN_MODE,
+        {ATTR_ENTITY_ID: "climate.living_room", ATTR_FAN_MODE: fan_mode},
+        blocking=True,
+    )
+
+    mock_connection.set_fan_mode.assert_called_once_with(expected_fan_mode)
+
+
+@pytest.mark.parametrize(
+    ("cooling_active", "heating_active", "zone_mode", "expected_action"),
+    [
+        ("0", "0", ZoneMode.OFF, HVACAction.OFF),
+        ("0", "2", ZoneMode.AUTO, HVACAction.HEATING),
+        ("2", "0", ZoneMode.AUTO, HVACAction.COOLING),
+        ("0", "0", ZoneMode.AUTO, HVACAction.IDLE),
+        ("0", "1", ZoneMode.AUTO, HVACAction.IDLE),
+        ("1", "0", ZoneMode.AUTO, HVACAction.IDLE),
+        ("0", "2", ZoneMode.COOL, HVACAction.IDLE),
+        ("2", "0", ZoneMode.HEAT, HVACAction.IDLE),
+        ("2", "2", ZoneMode.AUTO, HVACAction.COOLING),
+    ],
+)
+async def test_hvac_action(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_connection: MagicMock,
+    cooling_active: str,
+    heating_active: str,
+    zone_mode: ZoneMode,
+    expected_action: HVACAction,
+) -> None:
+    """Test HVAC action reflects thermostat state."""
+    mock_connection.state.cooling_active = cooling_active
+    mock_connection.state.heating_active = heating_active
+    mock_connection.state.zones["1"].mode = zone_mode
+
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    state = hass.states.get("climate.living_room")
+    assert state is not None
+    assert state.attributes["hvac_action"] == expected_action
+
+
+async def test_turn_on(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test turn on defaults to heat_cool mode."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "climate.living_room"},
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_called_once_with(
+        "1", hold_type=HoldType.MANUAL
+    )
+    mock_connection.set_zone_mode.assert_called_once_with("1", ZoneMode.AUTO)
+
+
+async def test_turn_off(
+    hass: HomeAssistant,
+    init_integration: MockConfigEntry,
+    mock_connection: MagicMock,
+) -> None:
+    """Test turn off sets mode to off."""
+    await hass.services.async_call(
+        CLIMATE_DOMAIN,
+        SERVICE_TURN_OFF,
+        {ATTR_ENTITY_ID: "climate.living_room"},
+        blocking=True,
+    )
+
+    mock_connection.set_temperature_setpoint.assert_not_called()
+    mock_connection.set_zone_mode.assert_called_once_with("1", ZoneMode.OFF)

tests/components/trane/test_switch.py

@@ -12,6 +12,7 @@ from homeassistant.const import (
     SERVICE_TURN_OFF,
     SERVICE_TURN_ON,
     STATE_OFF,
+    Platform,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import entity_registry as er
@@ -19,6 +20,12 @@ from homeassistant.helpers import entity_registry as er
 from tests.common import MockConfigEntry, snapshot_platform
 
 
+@pytest.fixture
+def platforms() -> list[Platform]:
+    """Platforms, which should be loaded during the test."""
+    return [Platform.SWITCH]
+
+
 @pytest.mark.usefixtures("entity_registry_enabled_by_default")
 async def test_switch_entities(
     hass: HomeAssistant,