Fixed missing fields

tests/test_hydrometer.py

@@ -22,6 +22,17 @@ async def test_get_hydrometers(client):
         assert hydros is not None
         assert len(hydros) == 1
 
+async def test_get_hydrometers_missing_fields(client):
+    with aioresponses() as responses:
+        responses.post("https://id.rapt.io/connect/token", payload=json_reader("./tests/json/token_response.json"))
+        responses.get("https://api.rapt.io/api/hydrometers/gethydrometers", payload=json_reader("./tests/json/get_hydrometers_response_missing_fields.json"))
+        hydrometer = Hydrometer(client)
+        hydros = await hydrometer.get_hydrometers()
+
+        assert hydros is not None
+        assert len(hydros) == 1
+
+
 async def test_get_hydrometers_500(client):
     with aioresponses() as responses:
         responses.post("https://id.rapt.io/connect/token", payload=json_reader("./tests/json/token_response.json"))