Fix daily_energy_consumed before first update

Author: Vilppu Vuorinen

pymelcloud/device.py

@@ -43,6 +43,7 @@ def __init__(
         self._device_conf = device_conf
         self._state = None
         self._device_units = None
+        self._energy_report = None
         self._client = client
 
         self._set_debounce = set_debounce

tests/test_device.py

@@ -46,7 +46,12 @@ async def test_energy_report_none_if_no_report():
 
     await device.update()
 
-    assert device.daily_energy_consumed == None
+    assert device.daily_energy_consumed is None
+
+def test_energy_report_before_update():
+    device = _build_device("ata_listdevice.json", "ata_get.json")
+
+    assert device.daily_energy_consumed is None
 
 @pytest.mark.asyncio
 async def test_round_temperature():