add test

Author: Ernst79

custom_components/ble_monitor/test/test_thermopro.py

@@ -20,6 +20,7 @@ def test_thermopro_tp357(self):
         assert sensor_msg["data"]
         assert sensor_msg["temperature"] == 27.9
         assert sensor_msg["humidity"] == 39
+        assert sensor_msg["battery low"] == 1
         assert sensor_msg["rssi"] == -68
 
     def test_thermopro_tp359(self):