Add total cycles sensor for Litter-Robot (home-assistant#147435)

* Add total cycles sensor for Litter-Robot

* Add translatable unit of measurement cycles

Author: natekspencer

homeassistant/components/litterrobot/icons.json

@@ -46,6 +46,9 @@
           "motor_fault_short": "mdi:flash-off",
           "motor_ot_amps": "mdi:flash-alert"
         }
+      },
+      "total_cycles": {
+        "default": "mdi:counter"
       }
     },
     "switch": {

homeassistant/components/litterrobot/sensor.py

@@ -115,6 +115,14 @@ class RobotSensorEntityDescription(SensorEntityDescription, Generic[_WhiskerEnti
                 lambda robot: status.lower() if (status := robot.status_code) else None
             ),
         ),
+        RobotSensorEntityDescription[LitterRobot](
+            key="total_cycles",
+            translation_key="total_cycles",
+            entity_category=EntityCategory.DIAGNOSTIC,
+            entity_registry_enabled_default=False,
+            state_class=SensorStateClass.TOTAL_INCREASING,
+            value_fn=lambda robot: robot.cycle_count,
+        ),
     ],
     LitterRobot4: [
         RobotSensorEntityDescription[LitterRobot4](

homeassistant/components/litterrobot/strings.json

@@ -118,6 +118,10 @@
           "spf": "Pinch detect at startup"
         }
       },
+      "total_cycles": {
+        "name": "Total cycles",
+        "unit_of_measurement": "cycles"
+      },
       "waste_drawer": {
         "name": "Waste drawer"
       }

tests/components/litterrobot/test_sensor.py

@@ -5,7 +5,11 @@
 import pytest
 
 from homeassistant.components.litterrobot.sensor import icon_for_gauge_level
-from homeassistant.components.sensor import DOMAIN as PLATFORM_DOMAIN, SensorDeviceClass
+from homeassistant.components.sensor import (
+    DOMAIN as PLATFORM_DOMAIN,
+    SensorDeviceClass,
+    SensorStateClass,
+)
 from homeassistant.const import PERCENTAGE, STATE_UNKNOWN, UnitOfMass
 from homeassistant.core import HomeAssistant
 
@@ -70,6 +74,7 @@ async def test_gauge_icon() -> None:
 
 
 @pytest.mark.freeze_time("2022-09-18 23:00:44+00:00")
+@pytest.mark.usefixtures("entity_registry_enabled_by_default")
 async def test_litter_robot_sensor(
     hass: HomeAssistant, mock_account_with_litterrobot_4: MagicMock
 ) -> None:
@@ -94,6 +99,9 @@ async def test_litter_robot_sensor(
     sensor = hass.states.get("sensor.test_pet_weight")
     assert sensor.state == "12.0"
     assert sensor.attributes["unit_of_measurement"] == UnitOfMass.POUNDS
+    sensor = hass.states.get("sensor.test_total_cycles")
+    assert sensor.state == "158"
+    assert sensor.attributes["state_class"] == SensorStateClass.TOTAL_INCREASING
 
 
 async def test_feeder_robot_sensor(