Only generate device trigger for sensor with unit (#27152)

tests/testing_config/custom_components/test/sensor.py

@@ -3,10 +3,24 @@ Provide a mock sensor platform.
 
 Call init before using it in your tests to ensure clean test data.
 """
-from homeassistant.components.sensor import DEVICE_CLASSES
+import homeassistant.components.sensor as sensor
 from tests.common import MockEntity
 
 
+DEVICE_CLASSES = list(sensor.DEVICE_CLASSES)
+DEVICE_CLASSES.append("none")
+
+UNITS_OF_MEASUREMENT = {
+    sensor.DEVICE_CLASS_BATTERY: "%",  # % of battery that is left
+    sensor.DEVICE_CLASS_HUMIDITY: "%",  # % of humidity in the air
+    sensor.DEVICE_CLASS_ILLUMINANCE: "lm",  # current light level (lx/lm)
+    sensor.DEVICE_CLASS_SIGNAL_STRENGTH: "dB",  # signal strength (dB/dBm)
+    sensor.DEVICE_CLASS_TEMPERATURE: "C",  # temperature (C/F)
+    sensor.DEVICE_CLASS_TIMESTAMP: "hh:mm:ss",  # timestamp (ISO8601)
+    sensor.DEVICE_CLASS_PRESSURE: "hPa",  # pressure (hPa/mbar)
+    sensor.DEVICE_CLASS_POWER: "kW",  # power (W/kW)
+}
+
 ENTITIES = {}
 
 
@@ -22,6 +36,7 @@ def init(empty=False):
                 name=f"{device_class} sensor",
                 unique_id=f"unique_{device_class}",
                 device_class=device_class,
+                unit_of_measurement=UNITS_OF_MEASUREMENT.get(device_class),
             )
             for device_class in DEVICE_CLASSES
         }
@@ -42,3 +57,8 @@ class MockSensor(MockEntity):
     def device_class(self):
         """Return the class of this sensor."""
         return self._handle("device_class")
+
+    @property
+    def unit_of_measurement(self):
+        """Return the unit_of_measurement of this sensor."""
+        return self._handle("unit_of_measurement")