Set zwave_js voltage sensor suggested precision (#107116)

homeassistant/components/zwave_js/sensor.py

@@ -128,6 +128,7 @@ ENTITY_DESCRIPTION_KEY_DEVICE_CLASS_MAP: dict[
         device_class=SensorDeviceClass.VOLTAGE,
         state_class=SensorStateClass.MEASUREMENT,
         native_unit_of_measurement=UnitOfElectricPotential.VOLT,
+        suggested_display_precision=0,
     ),
     (
         ENTITY_DESC_KEY_VOLTAGE,

tests/components/zwave_js/test_sensor.py

@@ -165,7 +165,10 @@ async def test_invalid_multilevel_sensor_scale(
 
 
 async def test_energy_sensors(
-    hass: HomeAssistant, hank_binary_switch, integration
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    hank_binary_switch,
+    integration,
 ) -> None:
     """Test power and energy sensors."""
     state = hass.states.get(POWER_SENSOR)
@@ -191,6 +194,13 @@ async def test_energy_sensors(
     assert state.attributes[ATTR_UNIT_OF_MEASUREMENT] == UnitOfElectricPotential.VOLT
     assert state.attributes[ATTR_DEVICE_CLASS] == SensorDeviceClass.VOLTAGE
 
+    entity_entry = entity_registry.async_get(VOLTAGE_SENSOR)
+
+    assert entity_entry is not None
+    sensor_options = entity_entry.options.get("sensor")
+    assert sensor_options is not None
+    assert sensor_options["suggested_display_precision"] == 0
+
     state = hass.states.get(CURRENT_SENSOR)
 
     assert state