Add Matter tests for BatVoltage attribute from PowerSource cluster (#125645)

* Add BatVoltage Attribute from PowerSource Cluster

* Update sensor.py

Remove comment

* Update homeassistant/components/matter/sensor.py

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

* Fixture for a Eve Door & Window node

Fixture for a Eve Door & Window node to check BatVoltage attribute from PowerSource cluster

* Test battery voltage sensor

* Update test_sensor.py

* ruff-format

* Update test_sensor.py

* Update test_sensor.py

battery_voltage attribute test

* Update test_sensor.py

* Update test_sensor.py

* Update tests/components/matter/test_sensor.py

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

* Update test_sensor.py

* Adjust values

---------

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

tests/components/matter/test_sensor.py

@@ -251,6 +251,33 @@ async def test_battery_sensor(
     assert entry.entity_category == EntityCategory.DIAGNOSTIC
 
 
+# This tests needs to be adjusted to remove lingering tasks
+@pytest.mark.parametrize("expected_lingering_tasks", [True])
+async def test_battery_sensor_voltage(
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    matter_client: MagicMock,
+    eve_contact_sensor_node: MatterNode,
+) -> None:
+    """Test battery voltage sensor."""
+    entity_id = "sensor.eve_door_voltage"
+    state = hass.states.get(entity_id)
+    assert state
+    assert state.state == "3.558"
+
+    set_node_attribute(eve_contact_sensor_node, 1, 47, 11, 4234)
+    await trigger_subscription_callback(hass, matter_client)
+
+    state = hass.states.get(entity_id)
+    assert state
+    assert state.state == "4.234"
+
+    entry = entity_registry.async_get(entity_id)
+
+    assert entry
+    assert entry.entity_category == EntityCategory.DIAGNOSTIC
+
+
 # This tests needs to be adjusted to remove lingering tasks
 @pytest.mark.parametrize("expected_lingering_tasks", [True])
 async def test_energy_sensors_custom_cluster(