Add DummySensor, helps implementing tests

src/config.ts

@@ -9,6 +9,7 @@ import {
 } from './iotawatt'
 import { getSensorData as getVirtualSensorData } from './virtual'
 import { getSensorData as getUnmeteredSensorData } from './unmetered'
+import { getSensorData as getDummySensorData } from './dummy'
 import {
   CharacteristicsSensorType,
   SensorType,
@@ -118,6 +119,9 @@ export const resolveAndValidateConfig = (config: Config): Config => {
       case SensorType.Unmetered:
         circuit.sensor.pollFunc = getUnmeteredSensorData
         break
+      case SensorType.Dummy:
+        circuit.sensor.pollFunc = getDummySensorData
+        break
       default:
         throw new Error(`Unrecognized sensor type ${circuit.sensor.type}`)
     }

src/dummy.ts

@@ -0,0 +1,11 @@
+import { emptySensorData, PowerSensorData, PowerSensorPollFunction } from './sensor'
+import { Circuit } from './circuit'
+
+export const getSensorData: PowerSensorPollFunction = async (
+  timestamp: number,
+  circuit: Circuit,
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  existingSensorData?: PowerSensorData[],
+): Promise<PowerSensorData> => {
+  return emptySensorData(timestamp, circuit)
+}

src/sensor.ts

@@ -6,6 +6,7 @@ export enum SensorType {
   Shelly = 'shelly',
   Virtual = 'virtual',
   Unmetered = 'unmetered',
+  Dummy = 'dummy',
 }
 
 export enum ShellyType {