Cleanup and test for optional interfaces (#799)

api/api.go

@@ -94,9 +94,9 @@ type ChargeRater interface {
 
 // Vehicle represents the EV and it's battery
 type Vehicle interface {
+	Battery
 	Title() string
 	Capacity() int64
-	SoC() (float64, error)
 }
 
 // VehicleFinishTimer provides estimated charge cycle finish time

core/wrapper/chargemeter.go

@@ -18,7 +18,7 @@ func (m *ChargeMeter) SetPower(power float64) {
 	m.power = power
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (m *ChargeMeter) CurrentPower() (float64, error) {
 	m.Lock()
 	defer m.Unlock()

internal/charger/evsewifi.go

@@ -210,6 +210,8 @@ func (evse *EVSEWifi) MaxCurrent(current int64) error {
 	return evse.checkError(evse.GetBody(url))
 }
 
+var _ api.ChargeTimer = (*EVSEWifi)(nil)
+
 // ChargingTime yields current charge run duration
 func (evse *EVSEWifi) ChargingTime() (time.Duration, error) {
 	params, err := evse.getParameters()

internal/charger/fritzdect.go

@@ -175,7 +175,9 @@ func (c *FritzDECT) MaxCurrent(current int64) error {
 	return nil
 }
 
-// CurrentPower implements the Meter interface.
+var _ api.Meter = (*FritzDECT)(nil)
+
+// CurrentPower implements the api.Meter interface
 func (c *FritzDECT) CurrentPower() (float64, error) {
 	// power value in 0,001 W (current switch power, refresh aproximately every 2 minutes)
 	resp, err := c.execFritzDectCmd("getswitchpower")

internal/charger/go-e.go

@@ -209,7 +209,9 @@ func (c *GoE) MaxCurrent(current int64) error {
 	return err
 }
 
-// CurrentPower implements the Meter interface.
+var _ api.Meter = (*GoE)(nil)
+
+// CurrentPower implements the api.Meter interface
 func (c *GoE) CurrentPower() (float64, error) {
 	status, err := c.apiStatus()
 	var power float64
@@ -219,14 +221,18 @@ func (c *GoE) CurrentPower() (float64, error) {
 	return power, err
 }
 
-// ChargedEnergy implements the ChargeRater interface
+var _ api.ChargeRater = (*GoE)(nil)
+
+// ChargedEnergy implements the api.ChargeRater interface
 func (c *GoE) ChargedEnergy() (float64, error) {
 	status, err := c.apiStatus()
 	energy := float64(status.Dws) / 3.6e5 // Deka-Watt-Seconds to kWh (100.000 == 0,277kWh)
 	return energy, err
 }
 
-// Currents implements the MeterCurrent interface
+var _ api.MeterCurrent = (*GoE)(nil)
+
+// Currents implements the api.MeterCurrent interface
 func (c *GoE) Currents() (float64, float64, float64, error) {
 	status, err := c.apiStatus()
 	if len(status.Nrg) == 16 {

internal/charger/keba.go

@@ -247,7 +247,9 @@ func (c *Keba) MaxCurrent(current int64) error {
 	return nil
 }
 
-// MaxCurrentMillis implements the ChargerEx interface
+var _ api.ChargerEx = (*Keba)(nil)
+
+// MaxCurrentMillis implements the api.ChargerEx interface
 func (c *Keba) MaxCurrentMillis(current float64) error {
 	d := int(1000 * current)
 
@@ -262,6 +264,8 @@ func (c *Keba) MaxCurrentMillis(current float64) error {
 	return nil
 }
 
+var _ api.Meter = (*Keba)(nil)
+
 // CurrentPower implements the Meter interface
 func (c *Keba) CurrentPower() (float64, error) {
 	var kr keba.Report3
@@ -271,6 +275,8 @@ func (c *Keba) CurrentPower() (float64, error) {
 	return float64(kr.P) / 1e3, err
 }
 
+var _ api.MeterEnergy = (*Keba)(nil)
+
 // TotalEnergy implements the MeterEnergy interface
 func (c *Keba) TotalEnergy() (float64, error) {
 	var kr keba.Report3
@@ -280,6 +286,8 @@ func (c *Keba) TotalEnergy() (float64, error) {
 	return float64(kr.ETotal) / 1e4, err
 }
 
+var _ api.ChargeRater = (*Keba)(nil)
+
 // ChargedEnergy implements the ChargeRater interface
 func (c *Keba) ChargedEnergy() (float64, error) {
 	var kr keba.Report3
@@ -289,6 +297,8 @@ func (c *Keba) ChargedEnergy() (float64, error) {
 	return float64(kr.EPres) / 1e4, err
 }
 
+var _ api.MeterCurrent = (*Keba)(nil)
+
 // Currents implements the MeterCurrents interface
 func (c *Keba) Currents() (float64, float64, float64, error) {
 	var kr keba.Report3

internal/charger/mcc.go

@@ -306,6 +306,8 @@ func (mcc *MobileConnect) MaxCurrent(current int64) error {
 	return nil
 }
 
+var _ api.Meter = (*MobileConnect)(nil)
+
 // CurrentPower implements the Meter interface.
 func (mcc *MobileConnect) CurrentPower() (float64, error) {
 	var energy MCCEnergy
@@ -314,6 +316,8 @@ func (mcc *MobileConnect) CurrentPower() (float64, error) {
 	return energy.L1.Power + energy.L2.Power + energy.L3.Power, err
 }
 
+var _ api.ChargeRater = (*MobileConnect)(nil)
+
 // ChargedEnergy implements the ChargeRater interface.
 func (mcc *MobileConnect) ChargedEnergy() (float64, error) {
 	var currentSession MCCCurrentSession
@@ -324,6 +328,8 @@ func (mcc *MobileConnect) ChargedEnergy() (float64, error) {
 	return currentSession.EnergySumKwh, nil
 }
 
+var _ api.ChargeTimer = (*MobileConnect)(nil)
+
 // ChargingTime yields current charge run duration
 func (mcc *MobileConnect) ChargingTime() (time.Duration, error) {
 	var currentSession MCCCurrentSession
@@ -334,6 +340,8 @@ func (mcc *MobileConnect) ChargingTime() (time.Duration, error) {
 	return time.Duration(currentSession.Duration * time.Second), nil
 }
 
+var _ api.MeterCurrent = (*MobileConnect)(nil)
+
 // Currents implements the MeterCurrent interface
 func (mcc *MobileConnect) Currents() (float64, float64, float64, error) {
 	var energy MCCEnergy

internal/charger/nrgble_linux.go

@@ -296,7 +296,9 @@ func (nrg *NRGKickBLE) MaxCurrent(current int64) error {
 	return nrg.write(nrgble.SettingsService, &settings)
 }
 
-// CurrentPower implements the Meter interface.
+var _ api.Meter = (*NRGKickBLE)(nil)
+
+// CurrentPower implements the api.Meter interface
 func (nrg *NRGKickBLE) CurrentPower() (float64, error) {
 	res := nrgble.Power{}
 	if err := nrg.read(nrgble.PowerService, &res); err != nil {
@@ -308,7 +310,9 @@ func (nrg *NRGKickBLE) CurrentPower() (float64, error) {
 	return float64(res.TotalPower) * 10, nil
 }
 
-// TotalEnergy implements the MeterEnergy interface.
+var _ api.MeterEnergy = (*NRGKickBLE)(nil)
+
+// TotalEnergy implements the api.MeterEnergy interface
 func (nrg *NRGKickBLE) TotalEnergy() (float64, error) {
 	res := nrgble.Energy{}
 	if err := nrg.read(nrgble.EnergyService, &res); err != nil {
@@ -320,7 +324,9 @@ func (nrg *NRGKickBLE) TotalEnergy() (float64, error) {
 	return float64(res.TotalEnergy) / 1000, nil
 }
 
-// Currents implements the MeterCurrent interface.
+var _ api.MeterCurrent = (*NRGKickBLE)(nil)
+
+// Currents implements the api.MeterCurrent interface
 func (nrg *NRGKickBLE) Currents() (float64, float64, float64, error) {
 	res := nrgble.VoltageCurrent{}
 	if err := nrg.read(nrgble.VoltageCurrentService, &res); err != nil {

internal/charger/nrgconnect.go

@@ -134,8 +134,8 @@ func (nrg *NRGKickConnect) Enabled() (bool, error) {
 	err := nrg.GetJSON(nrg.apiURL(nrgSettings), &res)
 	if err != nil {
 		if res.Message != "" {
-		err = errors.New(res.Message)
-	}
+			err = errors.New(res.Message)
+		}
 
 		return false, err
 	}
@@ -161,6 +161,8 @@ func (nrg *NRGKickConnect) MaxCurrent(current int64) error {
 	return nrg.putJSON(nrg.apiURL(nrgSettings), settings)
 }
 
+var _ api.Meter = (*NRGKickConnect)(nil)
+
 // CurrentPower implements the Meter interface
 func (nrg *NRGKickConnect) CurrentPower() (float64, error) {
 	var res NRGMeasurements
@@ -172,6 +174,8 @@ func (nrg *NRGKickConnect) CurrentPower() (float64, error) {
 	return 1000 * res.ChargingPower, err
 }
 
+var _ api.MeterEnergy = (*NRGKickConnect)(nil)
+
 // TotalEnergy implements the MeterEnergy interface
 func (nrg *NRGKickConnect) TotalEnergy() (float64, error) {
 	var res NRGMeasurements
@@ -183,6 +187,8 @@ func (nrg *NRGKickConnect) TotalEnergy() (float64, error) {
 	return res.ChargingEnergyOverAll, err
 }
 
+var _ api.MeterCurrent = (*NRGKickConnect)(nil)
+
 // Currents implements the MeterCurrent interface
 func (nrg *NRGKickConnect) Currents() (float64, float64, float64, error) {
 	var res NRGMeasurements

internal/charger/openwb.go

@@ -125,17 +125,23 @@ func NewOpenWB(log *util.Logger, mqttconf mqtt.Config, id int, topic string, tim
 	return res, nil
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+var _ api.Meter = (*OpenWB)(nil)
+
+// CurrentPower implements the api.Meter interface
 func (m *OpenWB) CurrentPower() (float64, error) {
 	return m.currentPowerG()
 }
 
-// TotalEnergy implements the Meter.TotalEnergy interface
+var _ api.MeterEnergy = (*OpenWB)(nil)
+
+// TotalEnergy implements the api.MeterEnergy interface
 func (m *OpenWB) TotalEnergy() (float64, error) {
 	return m.totalEnergyG()
 }
 
-// Currents implements the Meter.Currents interface
+var _ api.MeterCurrent = (*OpenWB)(nil)
+
+// Currents implements the api.MeterCurrent interface
 func (m *OpenWB) Currents() (float64, float64, float64, error) {
 	var currents []float64
 	for _, currentG := range m.currentsG {

internal/charger/phoenix-em-eth.go

@@ -131,6 +131,8 @@ func (wb *PhoenixEMEth) MaxCurrent(current int64) error {
 	return err
 }
 
+var _ api.ChargeTimer = (*PhoenixEMEth)(nil)
+
 // ChargingTime yields current charge run duration
 func (wb *PhoenixEMEth) ChargingTime() (time.Duration, error) {
 	b, err := wb.conn.ReadInputRegisters(phxEMEthRegChargeTime, 2)
@@ -143,7 +145,7 @@ func (wb *PhoenixEMEth) ChargingTime() (time.Duration, error) {
 	return time.Duration(time.Duration(secs) * time.Second), nil
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (wb *PhoenixEMEth) currentPower() (float64, error) {
 	b, err := wb.conn.ReadInputRegisters(phxEMEthRegPower, 2)
 	if err != nil {
@@ -153,7 +155,7 @@ func (wb *PhoenixEMEth) currentPower() (float64, error) {
 	return rs485.RTUUint32ToFloat64Swapped(b) * 10, err
 }
 
-// totalEnergy implements the Meter.TotalEnergy interface
+// totalEnergy implements the api.MeterEnergy interface
 func (wb *PhoenixEMEth) totalEnergy() (float64, error) {
 	b, err := wb.conn.ReadInputRegisters(phxEMEthRegEnergy, 2)
 	if err != nil {
@@ -163,7 +165,7 @@ func (wb *PhoenixEMEth) totalEnergy() (float64, error) {
 	return rs485.RTUUint32ToFloat64Swapped(b) / 100, err
 }
 
-// currents implements the Meter.Currents interface
+// currents implements the api.MeterCurrent interface
 func (wb *PhoenixEMEth) currents() (float64, float64, float64, error) {
 	var currents []float64
 	for _, regCurrent := range phxEMEthRegCurrents {

internal/charger/phoenix-ev-eth.go

@@ -132,6 +132,8 @@ func (wb *PhoenixEVEth) MaxCurrent(current int64) error {
 	return err
 }
 
+var _ api.ChargeTimer = (*PhoenixEVEth)(nil)
+
 // ChargingTime yields current charge run duration
 func (wb *PhoenixEVEth) ChargingTime() (time.Duration, error) {
 	b, err := wb.conn.ReadInputRegisters(phxEVEthRegChargeTime, 2)
@@ -144,7 +146,7 @@ func (wb *PhoenixEVEth) ChargingTime() (time.Duration, error) {
 	return time.Duration(time.Duration(secs) * time.Second), nil
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (wb *PhoenixEVEth) currentPower() (float64, error) {
 	b, err := wb.conn.ReadInputRegisters(phxEVEthRegPower, 2)
 	if err != nil {
@@ -154,7 +156,7 @@ func (wb *PhoenixEVEth) currentPower() (float64, error) {
 	return rs485.RTUUint32ToFloat64Swapped(b), err
 }
 
-// totalEnergy implements the Meter.TotalEnergy interface
+// totalEnergy implements the api.MeterEnergy interface
 func (wb *PhoenixEVEth) totalEnergy() (float64, error) {
 	b, err := wb.conn.ReadHoldingRegisters(phxEVEthRegEnergy, 2)
 	if err != nil {
@@ -164,7 +166,7 @@ func (wb *PhoenixEVEth) totalEnergy() (float64, error) {
 	return rs485.RTUUint32ToFloat64Swapped(b) / 1000, err
 }
 
-// currents implements the Meter.Currents interface
+// currents implements the api.MeterCurrent interface
 func (wb *PhoenixEVEth) currents() (float64, float64, float64, error) {
 	var currents []float64
 	for _, regCurrent := range phxEVEthRegCurrents {

internal/charger/wallbe.go

@@ -162,7 +162,7 @@ func (wb *Wallbe) MaxCurrent(current int64) error {
 	return err
 }
 
-// maxCurrentMillis implements the ChargerEx interface
+// maxCurrentMillis implements the api.ChargerEx interface
 func (wb *Wallbe) maxCurrentMillis(current float64) error {
 	if current < 6 {
 		return fmt.Errorf("invalid current %.5g", current)
@@ -174,7 +174,9 @@ func (wb *Wallbe) maxCurrentMillis(current float64) error {
 	return err
 }
 
-// ChargingTime yields current charge run duration
+var _ api.ChargeTimer = (*Wallbe)(nil)
+
+// ChargingTime implements the api.ChargeTimer interface
 func (wb *Wallbe) ChargingTime() (time.Duration, error) {
 	b, err := wb.conn.ReadInputRegisters(wbRegChargeTime, 2)
 	if err != nil {
@@ -199,7 +201,7 @@ func (wb *Wallbe) decodeReading(b []byte) float64 {
 	return float64(v)
 }
 
-// currentPower implements the Meter.CurrentPower interface
+// currentPower implements the api.Meter interface
 func (wb *Wallbe) currentPower() (float64, error) {
 	b, err := wb.conn.ReadInputRegisters(wbRegPower, 2)
 	if err != nil {
@@ -209,7 +211,7 @@ func (wb *Wallbe) currentPower() (float64, error) {
 	return wb.decodeReading(b), err
 }
 
-// totalEnergy implements the Meter.TotalEnergy interface
+// totalEnergy implements the api.MeterEnergy interface
 func (wb *Wallbe) totalEnergy() (float64, error) {
 	b, err := wb.conn.ReadInputRegisters(wbRegEnergy, 2)
 	if err != nil {
@@ -219,7 +221,7 @@ func (wb *Wallbe) totalEnergy() (float64, error) {
 	return wb.decodeReading(b), err
 }
 
-// currents implements the Meter.Currents interface
+// currents implements the api.MeterCurrent interface
 func (wb *Wallbe) currents() (float64, float64, float64, error) {
 	var currents []float64
 	for _, regCurrent := range wbRegCurrents {

internal/charger/warp.go

@@ -248,6 +248,8 @@ func (m *Warp) MaxCurrent(current int64) error {
 	return m.maxcurrentS(1000 * current)
 }
 
+var _ api.ChargerEx = (*Warp)(nil)
+
 // MaxCurrentMillis implements the api.ChargerEx interface
 func (m *Warp) MaxCurrentMillis(current float64) error {
 	return m.maxcurrentS(int64(1000 * current))
@@ -259,7 +261,7 @@ type powerStatus struct {
 	EnergyAbs float64 `json:"energy_abs"`
 }
 
-// currentPower implements the Meter.CurrentPower interface
+// currentPower implements the api.Meter interface
 func (m *Warp) currentPower() (float64, error) {
 	var res powerStatus
 
@@ -271,7 +273,7 @@ func (m *Warp) currentPower() (float64, error) {
 	return res.Power, err
 }
 
-// totalEnergy implements the Meter.TotalEnergy interface
+// totalEnergy implements the api.MeterEnergy interface
 func (m *Warp) totalEnergy() (float64, error) {
 	var res powerStatus
 

internal/meter/meter.go

@@ -121,17 +121,17 @@ func (m *Meter) Decorate(
 	return decorateMeter(m, totalEnergy, currents, batterySoC)
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (m *Meter) CurrentPower() (float64, error) {
 	return m.currentPowerG()
 }
 
-// totalEnergy implements the Meter.TotalEnergy interface
+// totalEnergy implements the api.MeterEnergy interface
 func (m *Meter) totalEnergy() (float64, error) {
 	return m.totalEnergyG()
 }
 
-// currents implements the Meter.Currents interface
+// currents implements the api.MeterCurrent interface
 func (m *Meter) currents() (float64, float64, float64, error) {
 	var currents []float64
 	for _, currentG := range m.currentsG {
@@ -146,7 +146,7 @@ func (m *Meter) currents() (float64, float64, float64, error) {
 	return currents[0], currents[1], currents[2], nil
 }
 
-// batterySoC implements the Battery.SoC interface
+// batterySoC implements the api.Battery interface
 func (m *Meter) batterySoC() (float64, error) {
 	return m.batterySoCG()
 }

internal/meter/modbus.go

@@ -151,17 +151,17 @@ func (m *Modbus) floatGetter(op modbus.Operation) (float64, error) {
 	return res.Value, err
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (m *Modbus) CurrentPower() (float64, error) {
 	return m.floatGetter(m.opPower)
 }
 
-// totalEnergy implements the Meter.TotalEnergy interface
+// totalEnergy implements the api.MeterEnergy interface
 func (m *Modbus) totalEnergy() (float64, error) {
 	return m.floatGetter(m.opEnergy)
 }
 
-// soc implements the Battery.SoC interface
+// soc implements the api.Battery interface
 func (m *Modbus) soc() (float64, error) {
 	return m.floatGetter(m.opSoC)
 }

internal/meter/sma.go

@@ -163,7 +163,7 @@ func (sm *SMA) hasValue() (values, error) {
 	return sm.values, nil
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (sm *SMA) CurrentPower() (float64, error) {
 	values, err := sm.hasValue()
 	return values.power, err

internal/meter/tesla.go

@@ -115,7 +115,7 @@ func (m *Tesla) Login() error {
 	return err
 }
 
-// CurrentPower implements the Meter.CurrentPower interface
+// CurrentPower implements the api.Meter interface
 func (m *Tesla) CurrentPower() (float64, error) {
 	var res powerwall.MeterResponse
 	if err := m.GetJSON(m.uri+powerwall.MeterURI, &res); err != nil {

internal/vehicle/bluelink/bluelink.go

@@ -352,6 +352,8 @@ func (v *API) statusAPI() (interface{}, error) {
 	return res, err
 }
 
+var _ api.Battery = (*API)(nil)
+
 // SoC implements the api.Vehicle interface
 func (v *API) SoC() (float64, error) {
 	res, err := v.apiG()
@@ -363,6 +365,8 @@ func (v *API) SoC() (float64, error) {
 	return 0, err
 }
 
+var _ api.VehicleFinishTimer = (*API)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *API) FinishTime() (time.Time, error) {
 	res, err := v.apiG()
@@ -380,6 +384,8 @@ func (v *API) FinishTime() (time.Time, error) {
 	return time.Time{}, err
 }
 
+var _ api.VehicleRange = (*API)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *API) Range() (int64, error) {
 	res, err := v.apiG()

internal/vehicle/carwings.go

@@ -90,6 +90,8 @@ func (v *CarWings) SoC() (float64, error) {
 	return v.chargeStateG()
 }
 
+var _ api.VehicleClimater = (*CarWings)(nil)
+
 // Climater implements the api.Vehicle.Climater interface
 func (v *CarWings) Climater() (active bool, outsideTemp float64, targetTemp float64, err error) {
 	res, err := v.hvacG()

internal/vehicle/id/provider.go

@@ -27,6 +27,8 @@ func NewProvider(api *API, vin string, cache time.Duration) *Provider {
 	return impl
 }
 
+var _ api.Battery = (*Provider)(nil)
+
 // SoC implements the api.Vehicle interface
 func (v *Provider) SoC() (float64, error) {
 	res, err := v.statusG()
@@ -37,7 +39,9 @@ func (v *Provider) SoC() (float64, error) {
 	return 0, err
 }
 
-// Status implements the Vehicle.Status interface
+var _ api.ChargeState = (*Provider)(nil)
+
+// Status implements the api.ChargeState interface
 func (v *Provider) Status() (api.ChargeStatus, error) {
 	status := api.StatusA // disconnected
 
@@ -54,6 +58,8 @@ func (v *Provider) Status() (api.ChargeStatus, error) {
 	return status, err
 }
 
+var _ api.VehicleFinishTimer = (*Provider)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *Provider) FinishTime() (time.Time, error) {
 	res, err := v.statusG()
@@ -66,6 +72,8 @@ func (v *Provider) FinishTime() (time.Time, error) {
 	return time.Time{}, err
 }
 
+var _ api.VehicleRange = (*Provider)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *Provider) Range() (int64, error) {
 	res, err := v.statusG()
@@ -76,7 +84,9 @@ func (v *Provider) Range() (int64, error) {
 	return 0, err
 }
 
-// Climater implements the Vehicle.Climater interface
+var _ api.VehicleClimater = (*Provider)(nil)
+
+// Climater implements the api.VehicleClimater interface
 func (v *Provider) Climater() (active bool, outsideTemp float64, targetTemp float64, err error) {
 	res, err := v.statusG()
 	if res, ok := res.(Status); err == nil && ok {
@@ -99,7 +109,9 @@ func (v *Provider) Climater() (active bool, outsideTemp float64, targetTemp floa
 	return active, outsideTemp, targetTemp, err
 }
 
-// StartCharge implements the VehicleStartCharge interface
+var _ api.VehicleStartCharge = (*Provider)(nil)
+
+// StartCharge implements the api.VehicleStartCharge interface
 func (v *Provider) StartCharge() error {
 	return v.startChargeAction()
 }

internal/vehicle/kamereon/api.go

@@ -40,6 +40,8 @@ func New(apiG func() (interface{}, error)) *API {
 	return &API{apiG: apiG}
 }
 
+var _ api.Battery = (*API)(nil)
+
 // SoC implements the api.Vehicle interface
 func (v *API) SoC() (float64, error) {
 	res, err := v.apiG()
@@ -51,6 +53,8 @@ func (v *API) SoC() (float64, error) {
 	return 0, err
 }
 
+var _ api.ChargeState = (*API)(nil)
+
 // Status implements the Vehicle.Status interface
 func (v *API) Status() (api.ChargeStatus, error) {
 	status := api.StatusA // disconnected
@@ -68,6 +72,8 @@ func (v *API) Status() (api.ChargeStatus, error) {
 	return status, err
 }
 
+var _ api.VehicleRange = (*API)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *API) Range() (int64, error) {
 	res, err := v.apiG()
@@ -79,6 +85,8 @@ func (v *API) Range() (int64, error) {
 	return 0, err
 }
 
+var _ api.VehicleFinishTimer = (*API)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *API) FinishTime() (time.Time, error) {
 	res, err := v.apiG()

internal/vehicle/porsche.go

@@ -334,7 +334,9 @@ func (v *Porsche) SoC() (float64, error) {
 	return 0, err
 }
 
-// Status implements the VehicleStatus interface
+var _ api.ChargeState = (*Porsche)(nil)
+
+// Status implements the api.ChargeState interface
 func (v *Porsche) Status() (api.ChargeStatus, error) {
 	res, err := v.chargerG()
 	if res, ok := res.(porscheEmobilityResponse); err == nil && ok {
@@ -354,6 +356,8 @@ func (v *Porsche) Status() (api.ChargeStatus, error) {
 	return api.StatusNone, err
 }
 
+var _ api.VehicleRange = (*Porsche)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *Porsche) Range() (int64, error) {
 	res, err := v.chargerG()
@@ -364,6 +368,22 @@ func (v *Porsche) Range() (int64, error) {
 	return 0, err
 }
 
+var _ api.VehicleFinishTimer = (*Porsche)(nil)
+
+// FinishTime implements the api.VehicleFinishTimer interface
+func (v *Porsche) FinishTime() (time.Time, error) {
+	res, err := v.chargerG()
+
+	if res, ok := res.(*porscheEmobilityResponse); err == nil && ok {
+		t := time.Now()
+		return t.Add(time.Duration(res.BatteryChargeStatus.RemainingChargeTimeUntil100PercentInMinutes) * time.Minute), err
+	}
+
+	return time.Time{}, err
+}
+
+var _ api.VehicleClimater = (*Porsche)(nil)
+
 // Climater implements the api.VehicleClimater interface
 func (v *Porsche) Climater() (active bool, outsideTemp float64, targetTemp float64, err error) {
 	res, err := v.chargerG()
@@ -378,15 +398,3 @@ func (v *Porsche) Climater() (active bool, outsideTemp float64, targetTemp float
 
 	return active, outsideTemp, targetTemp, err
 }
-
-// FinishTime implements the api.VehicleFinishTimer interface
-func (v *Porsche) FinishTime() (time.Time, error) {
-	res, err := v.chargerG()
-
-	if res, ok := res.(*porscheEmobilityResponse); err == nil && ok {
-		t := time.Now()
-		return t.Add(time.Duration(res.BatteryChargeStatus.RemainingChargeTimeUntil100PercentInMinutes) * time.Minute), err
-	}
-
-	return time.Time{}, err
-}

internal/vehicle/psa/provider.go

@@ -23,6 +23,8 @@ func NewProvider(api *API, vid string, cache time.Duration) *Provider {
 	return impl
 }
 
+var _ api.Battery = (*Provider)(nil)
+
 // SoC implements the api.Vehicle interface
 func (v *Provider) SoC() (float64, error) {
 	res, err := v.statusG()
@@ -37,6 +39,8 @@ func (v *Provider) SoC() (float64, error) {
 	return 0, err
 }
 
+var _ api.VehicleRange = (*Provider)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *Provider) Range() (int64, error) {
 	res, err := v.statusG()
@@ -51,6 +55,8 @@ func (v *Provider) Range() (int64, error) {
 	return 0, err
 }
 
+var _ api.VehicleFinishTimer = (*Provider)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *Provider) FinishTime() (time.Time, error) {
 	res, err := v.statusG()
@@ -66,6 +72,8 @@ func (v *Provider) FinishTime() (time.Time, error) {
 	return time.Time{}, err
 }
 
+var _ api.ChargeState = (*Provider)(nil)
+
 // Status implements the api.ChargeState interface
 func (v *Provider) Status() (api.ChargeStatus, error) {
 	res, err := v.statusG()
@@ -91,6 +99,8 @@ func (v *Provider) Status() (api.ChargeStatus, error) {
 	return api.StatusNone, err
 }
 
+var _ api.VehicleClimater = (*Provider)(nil)
+
 // Climater implements the api.VehicleClimater interface
 func (v *Provider) Climater() (active bool, outsideTemp float64, targetTemp float64, err error) {
 	res, err := v.statusG()

internal/vehicle/renault.go

@@ -349,7 +349,9 @@ func (v *Renault) SoC() (float64, error) {
 	return 0, err
 }
 
-// Status implements the Vehicle.Status interface
+var _ api.ChargeState = (*Renault)(nil)
+
+// Status implements the api.ChargeState interface
 func (v *Renault) Status() (api.ChargeStatus, error) {
 	status := api.StatusA // disconnected
 
@@ -366,6 +368,8 @@ func (v *Renault) Status() (api.ChargeStatus, error) {
 	return status, err
 }
 
+var _ api.VehicleRange = (*Renault)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *Renault) Range() (int64, error) {
 	res, err := v.batteryG()
@@ -377,6 +381,8 @@ func (v *Renault) Range() (int64, error) {
 	return 0, err
 }
 
+var _ api.VehicleFinishTimer = (*Renault)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *Renault) FinishTime() (time.Time, error) {
 	res, err := v.batteryG()
@@ -394,7 +400,9 @@ func (v *Renault) FinishTime() (time.Time, error) {
 	return time.Time{}, err
 }
 
-// Climater implements the api.Vehicle.Climater interface
+var _ api.VehicleClimater = (*Renault)(nil)
+
+// Climater implements the api.VehicleClimater interface
 func (v *Renault) Climater() (active bool, outsideTemp float64, targetTemp float64, err error) {
 	res, err := v.hvacG()
 

internal/vehicle/tesla.go

@@ -116,28 +116,7 @@ func (v *Tesla) SoC() (float64, error) {
 	return 0, err
 }
 
-// ChargedEnergy implements the api.ChargeRater interface
-func (v *Tesla) ChargedEnergy() (float64, error) {
-	res, err := v.chargeStateG()
-
-	if res, ok := res.(*tesla.ChargeState); err == nil && ok {
-		return float64(res.ChargeEnergyAdded), nil
-	}
-
-	return 0, err
-}
-
-// Range implements the api.VehicleRange interface
-func (v *Tesla) Range() (int64, error) {
-	res, err := v.chargeStateG()
-
-	if res, ok := res.(*tesla.ChargeState); err == nil && ok {
-		// miles to km
-		return int64(1.609344 * res.EstBatteryRange), nil
-	}
-
-	return 0, err
-}
+var _ api.ChargeState = (*Tesla)(nil)
 
 // Status implements the api.ChargeState interface
 func (v *Tesla) Status() (api.ChargeStatus, error) {
@@ -156,6 +135,35 @@ func (v *Tesla) Status() (api.ChargeStatus, error) {
 	return status, err
 }
 
+var _ api.ChargeRater = (*Tesla)(nil)
+
+// ChargedEnergy implements the api.ChargeRater interface
+func (v *Tesla) ChargedEnergy() (float64, error) {
+	res, err := v.chargeStateG()
+
+	if res, ok := res.(*tesla.ChargeState); err == nil && ok {
+		return float64(res.ChargeEnergyAdded), nil
+	}
+
+	return 0, err
+}
+
+var _ api.VehicleRange = (*Tesla)(nil)
+
+// Range implements the api.VehicleRange interface
+func (v *Tesla) Range() (int64, error) {
+	res, err := v.chargeStateG()
+
+	if res, ok := res.(*tesla.ChargeState); err == nil && ok {
+		// miles to km
+		return int64(1.609344 * res.EstBatteryRange), nil
+	}
+
+	return 0, err
+}
+
+var _ api.VehicleFinishTimer = (*Tesla)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *Tesla) FinishTime() (time.Time, error) {
 	res, err := v.chargeStateG()

internal/vehicle/volvo.go

@@ -190,7 +190,9 @@ func (v *Volvo) SoC() (float64, error) {
 	return 0, err
 }
 
-// Status implements the VehicleStatus interface
+var _ api.ChargeState = (*Volvo)(nil)
+
+// Status implements the api.ChargeState interface
 func (v *Volvo) Status() (api.ChargeStatus, error) {
 	res, err := v.statusG()
 	if res, ok := res.(volvoStatus); err == nil && ok {
@@ -207,8 +209,10 @@ func (v *Volvo) Status() (api.ChargeStatus, error) {
 	return api.StatusNone, err
 }
 
-// VehicleRange implements the VehicleRange interface
-func (v *Volvo) VehicleRange() (int64, error) {
+var _ api.VehicleRange = (*Volvo)(nil)
+
+// VehicleRange implements the api.VehicleRange interface
+func (v *Volvo) Range() (int64, error) {
 	res, err := v.statusG()
 	if res, ok := res.(volvoStatus); err == nil && ok {
 		return int64(res.HvBattery.DistanceToHVBatteryEmpty), nil
@@ -217,6 +221,8 @@ func (v *Volvo) VehicleRange() (int64, error) {
 	return 0, err
 }
 
+var _ api.VehicleFinishTimer = (*Volvo)(nil)
+
 // FinishTime implements the VehicleFinishTimer interface
 func (v *Volvo) FinishTime() (time.Time, error) {
 	res, err := v.statusG()

internal/vehicle/vw/provider.go

@@ -27,6 +27,8 @@ func NewProvider(api *API, vin string, cache time.Duration) *Provider {
 	return impl
 }
 
+var _ api.Battery = (*Provider)(nil)
+
 // SoC implements the api.Vehicle interface
 func (v *Provider) SoC() (float64, error) {
 	res, err := v.chargerG()
@@ -37,6 +39,8 @@ func (v *Provider) SoC() (float64, error) {
 	return 0, err
 }
 
+var _ api.ChargeState = (*Provider)(nil)
+
 // Status implements the api.ChargeState interface
 func (v *Provider) Status() (api.ChargeStatus, error) {
 	status := api.StatusA // disconnected
@@ -54,6 +58,8 @@ func (v *Provider) Status() (api.ChargeStatus, error) {
 	return status, err
 }
 
+var _ api.VehicleFinishTimer = (*Provider)(nil)
+
 // FinishTime implements the api.VehicleFinishTimer interface
 func (v *Provider) FinishTime() (time.Time, error) {
 	res, err := v.chargerG()
@@ -72,6 +78,8 @@ func (v *Provider) FinishTime() (time.Time, error) {
 	return time.Time{}, err
 }
 
+var _ api.VehicleRange = (*Provider)(nil)
+
 // Range implements the api.VehicleRange interface
 func (v *Provider) Range() (rng int64, err error) {
 	res, err := v.chargerG()
@@ -87,6 +95,8 @@ func (v *Provider) Range() (rng int64, err error) {
 	return rng, err
 }
 
+var _ api.VehicleClimater = (*Provider)(nil)
+
 // Climater implements the api.VehicleClimater interface
 func (v *Provider) Climater() (active bool, outsideTemp float64, targetTemp float64, err error) {
 	res, err := v.climateG()