Improvement tests

gios/__init__.py

@@ -75,7 +75,7 @@ async def update(self):  # pylint: disable=too-many-branches
                 # The GIOS server sends a null values for sensors several minutes before
                 # adding new data from measuring station. If the newest value is null
                 # we take the earlier value.
-                if len(sensor_data["values"]) > 0:
+                if len(sensor_data["values"]) > 0 or len(data) == 1:
                     if sensor_data["values"][0][ATTR_VALUE]:
                         data[sensor][ATTR_VALUE] = sensor_data["values"][0][ATTR_VALUE]
                     elif sensor_data.get("values")[1][ATTR_VALUE]:

tests/data/sensor_invalid_2.json

@@ -0,0 +1,4 @@
+{
+	"key": "PM10",
+	"values": []
+}

tests/test_base.py

@@ -142,15 +142,41 @@ async def test_no_sensor_data():
 
 
 @pytest.mark.asyncio
-async def test_invalid_sensor_data():
+async def test_invalid_sensor_data_1():
     """Test with invalid sensor data."""
     with open("tests/data/stations.json") as file:
         stations = json.load(file)
 
     with open("tests/data/station.json") as file:
         station = json.load(file)
 
-    with open("tests/data/sensor_invalid.json") as file:
+    with open("tests/data/sensor_invalid_1.json") as file:
+        sensor = json.load(file)
+
+    with patch("gios.Gios._get_stations", return_value=stations), patch(
+        "gios.Gios._get_station", return_value=station
+    ), patch("gios.Gios._get_sensor", return_value=sensor):
+
+        async with ClientSession() as websession:
+            gios = Gios(VALID_STATION_ID, websession)
+            await gios.update()
+
+        assert gios.station_name == VALID_STATION_NAME
+        assert gios.latitude == VALID_LATITUDE
+        assert gios.longitude == VALID_LONGITUDE
+        assert gios.available == False
+        assert gios.data == {}
+
+@pytest.mark.asyncio
+async def test_invalid_sensor_data_2():
+    """Test with invalid sensor data."""
+    with open("tests/data/stations.json") as file:
+        stations = json.load(file)
+
+    with open("tests/data/station.json") as file:
+        station = json.load(file)
+
+    with open("tests/data/sensor_invalid_2.json") as file:
         sensor = json.load(file)
 
     with patch("gios.Gios._get_stations", return_value=stations), patch(