Golang tools.NewFlow函数代码示例

func TestServiceFutureSurvival(t *testing.T) {
	connect := connectPacket()
	connect.ClientID = "test"
	connect.CleanSession = false

	connack := connackPacket()
	connack.SessionPresent = true

	publish1 := packet.NewPublishPacket()
	publish1.Message.Topic = "test"
	publish1.Message.Payload = []byte("test")
	publish1.Message.QOS = 1
	publish1.PacketID = 1

	publish2 := packet.NewPublishPacket()
	publish2.Message.Topic = "test"
	publish2.Message.Payload = []byte("test")
	publish2.Message.QOS = 1
	publish2.Dup = true
	publish2.PacketID = 1

	puback := packet.NewPubackPacket()
	puback.PacketID = 1

	broker1 := tools.NewFlow().
		Receive(connect).
		Send(connack).
		Receive(publish1).
		Close()

	broker2 := tools.NewFlow().
		Receive(connect).
		Send(connack).
		Receive(publish2).
		Send(puback).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker1, broker2)

	config := NewConfigWithClientID("tcp://localhost:"+port, "test")
	config.CleanSession = false

	s := NewService()

	s.Start(config)

	err := s.Publish("test", []byte("test"), 1, false).Wait()
	assert.NoError(t, err)

	s.Stop(true)

	<-done
}

func TestServiceReconnect(t *testing.T) {
	delay := tools.NewFlow().
		Receive(connectPacket()).
		Delay(55 * time.Millisecond).
		End()

	noDelay := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, delay, delay, delay, noDelay)

	online := make(chan struct{})
	offline := make(chan struct{})

	s := NewService()
	s.MinReconnectDelay = 50 * time.Millisecond
	s.ConnectTimeout = 50 * time.Millisecond

	i := 0
	s.Logger = func(msg string) {
		if msg == "Next Reconnect" {
			i++
		}
	}

	s.OnlineCallback = func(resumed bool) {
		assert.False(t, resumed)
		close(online)
	}

	s.OfflineCallback = func() {
		close(offline)
	}

	s.Start(NewConfig("tcp://localhost:" + port))

	<-online

	s.Stop(true)

	<-offline
	<-done

	assert.Equal(t, 4, i)
}

func TestClientKeepAliveTimeout(t *testing.T) {
	connect := connectPacket()
	connect.KeepAlive = 0

	pingreq := packet.NewPingreqPacket()

	broker := tools.NewFlow().
		Receive(connect).
		Send(connackPacket()).
		Receive(pingreq).
		End()

	done, port := fakeBroker(t, broker)

	wait := make(chan struct{})

	c := New()
	c.Callback = func(msg *packet.Message, err error) {
		assert.Nil(t, msg)
		assert.Equal(t, ErrClientMissingPong, err)
		close(wait)
	}

	config := NewConfig("tcp://localhost:" + port)
	config.KeepAlive = "5ms"

	future, err := c.Connect(config)
	assert.NoError(t, err)
	assert.NoError(t, future.Wait())
	assert.False(t, future.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, future.ReturnCode)

	<-wait
	<-done
}

func TestReceiveMessage(t *testing.T) {
	subscribe := packet.NewSubscribePacket()
	subscribe.PacketID = 1
	subscribe.Subscriptions = []packet.Subscription{
		{Topic: "test"},
	}

	suback := packet.NewSubackPacket()
	suback.PacketID = 1
	suback.ReturnCodes = []uint8{0}

	publish := packet.NewPublishPacket()
	publish.Message = packet.Message{
		Topic:   "test",
		Payload: []byte("test"),
		Retain:  true,
	}

	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(subscribe).
		Send(suback).
		Send(publish).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	msg, err := ReceiveMessage(NewConfig("tcp://localhost:"+port), "test", 0)
	assert.NoError(t, err)
	assert.Equal(t, publish.Message.String(), msg.String())

	<-done
}

func TestClientConnectWithCredentials(t *testing.T) {
	connect := connectPacket()
	connect.Username = "test"
	connect.Password = "test"

	broker := tools.NewFlow().
		Receive(connect).
		Send(connackPacket()).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Callback = errorCallback(t)

	future, err := c.Connect(NewConfig(fmt.Sprintf("tcp://test:[email protected]:%s/", port)))
	assert.NoError(t, err)
	assert.NoError(t, future.Wait())
	assert.False(t, future.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, future.ReturnCode)

	err = c.Disconnect()
	assert.NoError(t, err)

	<-done
}

func TestClientConnectCustomDialer(t *testing.T) {
	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Callback = errorCallback(t)

	config := NewConfig("tcp://localhost:" + port)
	config.Dialer = transport.NewDialer()

	future, err := c.Connect(config)
	assert.NoError(t, err)
	assert.NoError(t, future.Wait())
	assert.False(t, future.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, future.ReturnCode)

	err = c.Disconnect()
	assert.NoError(t, err)

	<-done
}

func TestClientUnexpectedClose(t *testing.T) {
	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Close()

	done, port := fakeBroker(t, broker)

	wait := make(chan struct{})

	c := New()
	c.Callback = func(msg *packet.Message, err error) {
		assert.Nil(t, msg)
		assert.Error(t, err)
		close(wait)
	}

	future, err := c.Connect(NewConfig("tcp://localhost:" + port))
	assert.NoError(t, err)
	assert.NoError(t, future.Wait())
	assert.False(t, future.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, future.ReturnCode)

	<-wait
	<-done
}

func TestClientFutureCancellation(t *testing.T) {
	publish := packet.NewPublishPacket()
	publish.Message.Topic = "test"
	publish.Message.Payload = []byte("test")
	publish.Message.QOS = 1
	publish.PacketID = 1

	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(publish).
		Close()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Callback = func(msg *packet.Message, err error) {
		assert.Nil(t, msg)
		assert.Error(t, err)
	}

	connectFuture, err := c.Connect(NewConfig("tcp://localhost:" + port))
	assert.NoError(t, err)
	assert.NoError(t, connectFuture.Wait())
	assert.False(t, connectFuture.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, connectFuture.ReturnCode)

	publishFuture, err := c.Publish("test", []byte("test"), 1, false)
	assert.NoError(t, err)
	assert.Equal(t, ErrFutureCanceled, publishFuture.Wait())

	<-done
}

func TestStartStopVariations(t *testing.T) {
	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	online := make(chan struct{})
	offline := make(chan struct{})

	s := NewService()

	s.OnlineCallback = func(resumed bool) {
		assert.False(t, resumed)
		close(online)
	}

	s.OfflineCallback = func() {
		close(offline)
	}

	s.Start(NewConfig("tcp://localhost:" + port))
	s.Start(NewConfig("tcp://localhost:" + port)) // <- does nothing

	<-online

	s.Stop(true)
	s.Stop(true) // <- does nothing

	<-offline
	<-done
}

func TestServiceCommandsInCallback(t *testing.T) {
	subscribe := packet.NewSubscribePacket()
	subscribe.Subscriptions = []packet.Subscription{{Topic: "test"}}
	subscribe.PacketID = 1

	suback := packet.NewSubackPacket()
	suback.ReturnCodes = []uint8{0}
	suback.PacketID = 1

	publish := packet.NewPublishPacket()
	publish.Message.Topic = "test"
	publish.Message.Payload = []byte("test")

	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(subscribe).
		Send(suback).
		Receive(publish).
		Send(publish).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	message := make(chan struct{})
	offline := make(chan struct{})

	s := NewService()

	s.OnlineCallback = func(resumed bool) {
		assert.False(t, resumed)

		s.Subscribe("test", 0)
		s.Publish("test", []byte("test"), 0, false)
	}

	s.OfflineCallback = func() {
		close(offline)
	}

	s.MessageCallback = func(msg *packet.Message) {
		assert.Equal(t, "test", msg.Topic)
		assert.Equal(t, []byte("test"), msg.Payload)
		assert.Equal(t, uint8(0), msg.QOS)
		assert.False(t, msg.Retain)

		close(message)
	}

	s.Start(NewConfig("tcp://localhost:" + port))

	<-message

	s.Stop(true)

	<-offline
	<-done
}

func TestClientLogger(t *testing.T) {
	subscribe := packet.NewSubscribePacket()
	subscribe.Subscriptions = []packet.Subscription{{Topic: "test"}}
	subscribe.PacketID = 1

	suback := packet.NewSubackPacket()
	suback.ReturnCodes = []uint8{0}
	suback.PacketID = 1

	publish := packet.NewPublishPacket()
	publish.Message.Topic = "test"
	publish.Message.Payload = []byte("test")

	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(subscribe).
		Send(suback).
		Receive(publish).
		Send(publish).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	wait := make(chan struct{})

	c := New()
	c.Callback = func(msg *packet.Message, err error) {
		close(wait)
	}

	var counter uint32
	c.Logger = func(msg string) {
		atomic.AddUint32(&counter, 1)
	}

	future, _ := c.Connect(NewConfig("tcp://localhost:" + port))
	future.Wait()

	subscribeFuture, _ := c.Subscribe("test", 0)
	subscribeFuture.Wait()

	publishFuture, _ := c.Publish("test", []byte("test"), 0, false)
	publishFuture.Wait()

	<-wait

	c.Disconnect()

	<-done

	assert.Equal(t, uint32(8), counter)
}

func TestClientKeepAlive(t *testing.T) {
	connect := connectPacket()
	connect.KeepAlive = 0

	pingreq := packet.NewPingreqPacket()
	pingresp := packet.NewPingrespPacket()

	broker := tools.NewFlow().
		Receive(connect).
		Send(connackPacket()).
		Receive(pingreq).
		Send(pingresp).
		Receive(pingreq).
		Send(pingresp).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Callback = errorCallback(t)

	var reqCounter int32
	var respCounter int32

	c.Logger = func(message string) {
		if strings.Contains(message, "Pingreq") {
			atomic.AddInt32(&reqCounter, 1)
		} else if strings.Contains(message, "Pingresp") {
			atomic.AddInt32(&respCounter, 1)
		}
	}

	config := NewConfig("tcp://localhost:" + port)
	config.KeepAlive = "100ms"

	future, err := c.Connect(config)
	assert.NoError(t, err)
	assert.NoError(t, future.Wait())
	assert.False(t, future.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, future.ReturnCode)

	<-time.After(250 * time.Millisecond)

	err = c.Disconnect()
	assert.NoError(t, err)

	assert.Equal(t, int32(2), atomic.LoadInt32(&reqCounter))
	assert.Equal(t, int32(2), atomic.LoadInt32(&respCounter))

	<-done
}

func TestClientSessionResumption(t *testing.T) {
	connect := connectPacket()
	connect.ClientID = "test"
	connect.CleanSession = false

	publish1 := packet.NewPublishPacket()
	publish1.Message.Topic = "test"
	publish1.Message.Payload = []byte("test")
	publish1.Message.QOS = 1
	publish1.PacketID = 1

	puback1 := packet.NewPubackPacket()
	puback1.PacketID = 1

	broker := tools.NewFlow().
		Receive(connect).
		Send(connackPacket()).
		Receive(publish1).
		Send(puback1).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Session.SavePacket(outgoing, publish1)
	c.Session.PacketID()
	c.Callback = errorCallback(t)

	config := NewConfig("tcp://localhost:" + port)
	config.ClientID = "test"
	config.CleanSession = false

	connectFuture, err := c.Connect(config)
	assert.NoError(t, err)
	assert.NoError(t, connectFuture.Wait())
	assert.False(t, connectFuture.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, connectFuture.ReturnCode)

	time.Sleep(20 * time.Millisecond)

	err = c.Disconnect()
	assert.NoError(t, err)

	<-done

	pkts, err := c.Session.AllPackets(outgoing)
	assert.NoError(t, err)
	assert.Equal(t, 0, len(pkts))
}

func TestClientDisconnectWithTimeout(t *testing.T) {
	publish := packet.NewPublishPacket()
	publish.Message.Topic = "test"
	publish.Message.Payload = []byte("test")
	publish.Message.QOS = 1
	publish.PacketID = 1

	puback := packet.NewPubackPacket()
	puback.PacketID = 1

	wait := func() {
		time.Sleep(100 * time.Millisecond)
	}

	broker := tools.NewFlow().
		Receive(connectPacket()).
		Send(connackPacket()).
		Receive(publish).
		Run(wait).
		Send(puback).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Callback = errorCallback(t)

	connectFuture, err := c.Connect(NewConfig("tcp://localhost:" + port))
	assert.NoError(t, err)
	assert.NoError(t, connectFuture.Wait())
	assert.False(t, connectFuture.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, connectFuture.ReturnCode)

	publishFuture, err := c.Publish("test", []byte("test"), 1, false)
	assert.NoError(t, err)
	assert.NotNil(t, publishFuture)

	err = c.Disconnect(10 * time.Second)
	assert.NoError(t, err)

	<-done

	assert.NoError(t, publishFuture.Wait())

	list, err := c.Session.AllPackets(outgoing)
	assert.NoError(t, err)
	assert.Equal(t, 0, len(list))
}

func TestClientHardDisconnect(t *testing.T) {
	connect := connectPacket()
	connect.ClientID = "test"
	connect.CleanSession = false

	publish := packet.NewPublishPacket()
	publish.Message.Topic = "test"
	publish.Message.Payload = []byte("test")
	publish.Message.QOS = 1
	publish.PacketID = 1

	broker := tools.NewFlow().
		Receive(connect).
		Send(connackPacket()).
		Receive(publish).
		Receive(disconnectPacket()).
		End()

	done, port := fakeBroker(t, broker)

	c := New()
	c.Callback = errorCallback(t)

	config := NewConfig("tcp://localhost:" + port)
	config.ClientID = "test"
	config.CleanSession = false

	connectFuture, err := c.Connect(config)
	assert.NoError(t, err)
	assert.NoError(t, connectFuture.Wait())
	assert.False(t, connectFuture.SessionPresent)
	assert.Equal(t, packet.ConnectionAccepted, connectFuture.ReturnCode)

	publishFuture, err := c.Publish("test", []byte("test"), 1, false)
	assert.NoError(t, err)
	assert.NotNil(t, publishFuture)

	err = c.Disconnect()
	assert.NoError(t, err)

	assert.Equal(t, ErrFutureCanceled, publishFuture.Wait())

	<-done

	list, err := c.Session.AllPackets(outgoing)
	assert.NoError(t, err)
	assert.Equal(t, 1, len(list))
}