Do not fetch disconnected Home Connect appliances (#142200)

* Do not fetch disconnected Home Connect appliances

* Apply suggestions

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

* Update docstring

---------

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>

homeassistant/components/home_connect/coordinator.py

@@ -74,6 +74,19 @@ class HomeConnectApplianceData:
         self.settings.update(other.settings)
         self.status.update(other.status)
 
+    @classmethod
+    def empty(cls, appliance: HomeAppliance) -> HomeConnectApplianceData:
+        """Return empty data."""
+        return cls(
+            commands=set(),
+            events={},
+            info=appliance,
+            options={},
+            programs=[],
+            settings={},
+            status={},
+        )
+
 
 class HomeConnectCoordinator(
     DataUpdateCoordinator[dict[str, HomeConnectApplianceData]]
@@ -362,15 +375,7 @@ class HomeConnectCoordinator(
                 model=appliance.vib,
             )
             if appliance.ha_id not in self.data:
-                self.data[appliance.ha_id] = HomeConnectApplianceData(
-                    commands=set(),
-                    events={},
-                    info=appliance,
-                    options={},
-                    programs=[],
-                    settings={},
-                    status={},
-                )
+                self.data[appliance.ha_id] = HomeConnectApplianceData.empty(appliance)
             else:
                 self.data[appliance.ha_id].info.connected = appliance.connected
                 old_appliances.remove(appliance.ha_id)
@@ -406,6 +411,15 @@ class HomeConnectCoordinator(
             name=appliance.name,
             model=appliance.vib,
         )
+        if not appliance.connected:
+            _LOGGER.debug(
+                "Appliance %s is not connected, skipping data fetch",
+                appliance.ha_id,
+            )
+            if appliance_data_to_update:
+                appliance_data_to_update.info.connected = False
+                return appliance_data_to_update
+            return HomeConnectApplianceData.empty(appliance)
         try:
             settings = {
                 setting.key: setting

tests/components/home_connect/test_coordinator.py

@@ -54,6 +54,14 @@ from homeassistant.util import dt as dt_util
 
 from tests.common import MockConfigEntry, async_fire_time_changed
 
+INITIAL_FETCH_CLIENT_METHODS = [
+    "get_settings",
+    "get_status",
+    "get_all_programs",
+    "get_available_commands",
+    "get_available_program",
+]
+
 
 @pytest.fixture
 def platforms() -> list[str]:
@@ -214,15 +222,32 @@ async def test_coordinator_failure_refresh_and_stream(
     assert state.state != STATE_UNAVAILABLE
 
 
+@pytest.mark.parametrize(
+    "appliance",
+    ["Dishwasher"],
+    indirect=True,
+)
+async def test_coordinator_not_fetching_on_disconnected_appliance(
+    config_entry: MockConfigEntry,
+    integration_setup: Callable[[MagicMock], Awaitable[bool]],
+    setup_credentials: None,
+    client: MagicMock,
+    appliance: HomeAppliance,
+) -> None:
+    """Test that the coordinator does not fetch anything on disconnected appliance."""
+    appliance.connected = False
+
+    assert config_entry.state == ConfigEntryState.NOT_LOADED
+    await integration_setup(client)
+    assert config_entry.state == ConfigEntryState.LOADED
+
+    for method in INITIAL_FETCH_CLIENT_METHODS:
+        assert getattr(client, method).call_count == 0
+
+
 @pytest.mark.parametrize(
     "mock_method",
-    [
-        "get_settings",
-        "get_status",
-        "get_all_programs",
-        "get_available_commands",
-        "get_available_program",
-    ],
+    INITIAL_FETCH_CLIENT_METHODS,
 )
 async def test_coordinator_update_failing(
     mock_method: str,
@@ -552,3 +577,35 @@ async def test_devices_updated_on_refresh(
     assert not device_registry.async_get_device({(DOMAIN, appliances[0].ha_id)})
     for appliance in appliances[2:3]:
         assert device_registry.async_get_device({(DOMAIN, appliance.ha_id)})
+
+
+@pytest.mark.parametrize("appliance", ["Washer"], indirect=True)
+async def test_paired_disconnected_devices_not_fetching(
+    hass: HomeAssistant,
+    config_entry: MockConfigEntry,
+    integration_setup: Callable[[MagicMock], Awaitable[bool]],
+    setup_credentials: None,
+    client: MagicMock,
+    appliance: HomeAppliance,
+) -> None:
+    """Test that Home Connect API is not fetched after pairing a disconnected device."""
+    client.get_home_appliances = AsyncMock(return_value=ArrayOfHomeAppliances([]))
+    assert config_entry.state == ConfigEntryState.NOT_LOADED
+    assert await integration_setup(client)
+    assert config_entry.state == ConfigEntryState.LOADED
+
+    appliance.connected = False
+    await client.add_events(
+        [
+            EventMessage(
+                appliance.ha_id,
+                EventType.PAIRED,
+                data=ArrayOfEvents([]),
+            )
+        ]
+    )
+    await hass.async_block_till_done()
+
+    client.get_specific_appliance.assert_awaited_once_with(appliance.ha_id)
+    for method in INITIAL_FETCH_CLIENT_METHODS:
+        assert getattr(client, method).call_count == 0