refactor: move led and part modules to pkg
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										112
									
								
								pkg/part/part.go
									
									
									
									
									
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										112
									
								
								pkg/part/part.go
									
									
									
									
									
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package part
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import (
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	"fmt"
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	"github.com/cyrilix/robocar-base/service"
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	"github.com/cyrilix/robocar-led/pkg/led"
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	"github.com/cyrilix/robocar-protobuf/go/events"
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	mqtt "github.com/eclipse/paho.mqtt.golang"
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	"github.com/golang/protobuf/proto"
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	"go.uber.org/zap"
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	"sync"
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	"time"
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)
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func NewPart(client mqtt.Client, driveModeTopic, recordTopic string) *LedPart {
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	return &LedPart{
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		led:              led.New(),
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		client:           client,
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		onDriveModeTopic: driveModeTopic,
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		onRecordTopic:    recordTopic,
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		muDriveMode:      sync.Mutex{},
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		m:                events.DriveMode_INVALID,
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		muRecord:         sync.Mutex{},
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		recordEnabled:    false,
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	}
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}
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type LedPart struct {
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	led    led.ColoredLed
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	client mqtt.Client
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	onDriveModeTopic string
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	onRecordTopic    string
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	muDriveMode   sync.Mutex
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	m             events.DriveMode
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	muRecord      sync.Mutex
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	recordEnabled bool
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}
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func (p *LedPart) Start() error {
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	if err := p.registerCallbacks(); err != nil {
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		return fmt.Errorf("unable to start service: %v", err)
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	}
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	for {
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		time.Sleep(1 * time.Hour)
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	}
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}
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func (p *LedPart) Stop() {
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	defer p.led.SetBlink(0)
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	defer p.led.SetGreen(0)
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	defer p.led.SetBlue(0)
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	defer p.led.SetRed(0)
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	service.StopService("led", p.client, p.onDriveModeTopic, p.onRecordTopic)
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}
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func (p *LedPart) onDriveMode(_ mqtt.Client, message mqtt.Message) {
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	var driveModeMessage events.DriveModeMessage
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	err := proto.Unmarshal(message.Payload(), &driveModeMessage)
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	if err != nil {
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		zap.S().Errorf("unable to unmarshal %T message: %v", driveModeMessage, err)
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		return
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	}
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	switch driveModeMessage.GetDriveMode() {
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	case events.DriveMode_USER:
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		p.led.SetRed(0)
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		p.led.SetGreen(255)
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		p.led.SetBlue(0)
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	case events.DriveMode_PILOT:
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		p.led.SetRed(0)
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		p.led.SetGreen(0)
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		p.led.SetBlue(255)
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	}
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}
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func (p *LedPart) onRecord(client mqtt.Client, message mqtt.Message) {
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	var switchRecord events.SwitchRecordMessage
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	err := proto.Unmarshal(message.Payload(), &switchRecord)
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	if err != nil {
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		zap.S().Errorf("unable to unmarchal %T message: %v", switchRecord, err)
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		return
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	}
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	p.muRecord.Lock()
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	defer p.muRecord.Unlock()
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	if p.recordEnabled == switchRecord.GetEnabled() {
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		return
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	}
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	p.recordEnabled = switchRecord.GetEnabled()
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	if switchRecord.GetEnabled() {
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		zap.S().Info("record mode enabled")
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		p.led.SetBlink(2)
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	} else {
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		zap.S().Info("record mode disabled")
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		p.led.SetBlink(0)
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	}
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}
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func (p *LedPart) registerCallbacks() error {
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	err := service.RegisterCallback(p.client, p.onDriveModeTopic, p.onDriveMode)
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	if err != nil {
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		return err
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	}
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	err = service.RegisterCallback(p.client, p.onRecordTopic, p.onRecord)
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	if err != nil {
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		return err
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	}
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	return nil
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}
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										104
									
								
								pkg/part/part_test.go
									
									
									
									
									
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										104
									
								
								pkg/part/part_test.go
									
									
									
									
									
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							@@ -0,0 +1,104 @@
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package part
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import (
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	"github.com/cyrilix/robocar-base/testtools"
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	"github.com/cyrilix/robocar-protobuf/go/events"
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	mqtt "github.com/eclipse/paho.mqtt.golang"
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	"github.com/golang/protobuf/proto"
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	"testing"
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	"time"
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)
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type fakeLed struct {
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	red, green, blue int
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	blink            bool
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}
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func (f *fakeLed) SetBlink(freq float64) {
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	if freq > 0 {
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		f.blink = true
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	} else {
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		f.blink = false
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	}
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}
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func (f *fakeLed) SetRed(value int) {
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	f.red = value
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}
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func (f *fakeLed) SetGreen(value int) {
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	f.green = value
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}
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func (f *fakeLed) SetBlue(value int) {
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	f.blue = value
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}
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func TestLedPart_OnDriveMode(t *testing.T) {
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	led := fakeLed{}
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	p := LedPart{led: &led}
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	cases := []struct {
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		msg              mqtt.Message
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		red, green, blue int
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	}{
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		{testtools.NewFakeMessageFromProtobuf("drive", &events.DriveModeMessage{DriveMode: events.DriveMode_USER}), 0, 255, 0},
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		{testtools.NewFakeMessageFromProtobuf("drive", &events.DriveModeMessage{DriveMode: events.DriveMode_PILOT}), 0, 0, 255},
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		{testtools.NewFakeMessageFromProtobuf("drive", &events.DriveModeMessage{DriveMode: events.DriveMode_INVALID}), 0, 0, 255},
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	}
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	for _, c := range cases {
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		p.onDriveMode(nil, c.msg)
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		time.Sleep(1 * time.Millisecond)
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		var msg events.DriveModeMessage
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		err := proto.Unmarshal(c.msg.Payload(), &msg)
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		if err != nil {
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			t.Errorf("unable to unmarshal drive mode message: %v", err)
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		}
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		value := msg.DriveMode
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		if led.red != c.red {
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			t.Errorf("driveMode(%v)=invalid value for red channel: %v, wants %v", value, led.red, c.red)
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		}
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		if led.green != c.green {
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			if err != nil {
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				t.Errorf("payload isn't a led value: %v", err)
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			}
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			t.Errorf("driveMode(%v)=invalid value for green channel: %v, wants %v", value, led.green, c.green)
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		}
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		if led.blue != c.blue {
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			if err != nil {
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				t.Errorf("payload isn't a led value: %v", err)
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			}
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			t.Errorf("driveMode(%v)=invalid value for blue channel: %v, wants %v", value, led.blue, c.blue)
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		}
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	}
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}
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func TestLedPart_OnRecord(t *testing.T) {
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	led := fakeLed{}
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	p := LedPart{led: &led}
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	cases := []struct {
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		msg    mqtt.Message
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		record bool
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		blink  bool
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	}{
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		{testtools.NewFakeMessageFromProtobuf("record", &events.SwitchRecordMessage{Enabled: false}), true, false},
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		{testtools.NewFakeMessageFromProtobuf("record", &events.SwitchRecordMessage{Enabled: true}), false, true},
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		{testtools.NewFakeMessageFromProtobuf("record", &events.SwitchRecordMessage{Enabled: false}), true, false},
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		{testtools.NewFakeMessageFromProtobuf("record", &events.SwitchRecordMessage{Enabled: true}), false, true},
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	}
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	for _, c := range cases {
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		p.onRecord(nil, c.msg)
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		if led.blink != c.blink {
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			var msg events.SwitchRecordMessage
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			err := proto.Unmarshal(c.msg.Payload(), &msg)
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			if err != nil {
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				t.Errorf("unable to unmarshal %T message: %v", msg, err)
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			}
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			value := msg.Enabled
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			t.Errorf("onRecord(%v): %v, wants %v", value, c.record, led.blink)
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		}
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	}
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}
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