package mqtt_consumer import ( "testing" "time" "github.com/influxdata/telegraf/plugins/parsers" "github.com/influxdata/telegraf/testutil" "github.com/stretchr/testify/assert" "github.com/eclipse/paho.mqtt.golang" ) const ( testMsg = "cpu_load_short,host=server01 value=23422.0 1422568543702900257\n" testMsgGraphite = "cpu.load.short.graphite 23422 1454780029" testMsgJSON = "{\"a\": 5, \"b\": {\"c\": 6}}\n" invalidMsg = "cpu_load_short,host=server01 1422568543702900257\n" ) func newTestMQTTConsumer() (*MQTTConsumer, chan mqtt.Message) { in := make(chan mqtt.Message, 100) n := &MQTTConsumer{ Topics: []string{"telegraf"}, Servers: []string{"localhost:1883"}, in: in, done: make(chan struct{}), } return n, in } // Test that default client has random ID func TestRandomClientID(t *testing.T) { m1 := &MQTTConsumer{ Servers: []string{"localhost:1883"}} opts, err := m1.createOpts() assert.NoError(t, err) m2 := &MQTTConsumer{ Servers: []string{"localhost:1883"}} opts2, err2 := m2.createOpts() assert.NoError(t, err2) assert.NotEqual(t, opts.ClientID, opts2.ClientID) } // Test that default client has random ID func TestClientID(t *testing.T) { m1 := &MQTTConsumer{ Servers: []string{"localhost:1883"}, ClientID: "telegraf-test", } opts, err := m1.createOpts() assert.NoError(t, err) m2 := &MQTTConsumer{ Servers: []string{"localhost:1883"}, ClientID: "telegraf-test", } opts2, err2 := m2.createOpts() assert.NoError(t, err2) assert.Equal(t, "telegraf-test", opts2.ClientID) assert.Equal(t, "telegraf-test", opts.ClientID) } // Test that Start() fails if client ID is not set but persistent is func TestPersistentClientIDFail(t *testing.T) { m1 := &MQTTConsumer{ Servers: []string{"localhost:1883"}, PersistentSession: true, } acc := testutil.Accumulator{} err := m1.Start(&acc) assert.Error(t, err) } // Test that the parser parses NATS messages into metrics func TestRunParser(t *testing.T) { n, in := newTestMQTTConsumer() acc := testutil.Accumulator{} n.acc = &acc defer close(n.done) n.parser, _ = parsers.NewInfluxParser() go n.receiver() in <- mqttMsg(testMsg) time.Sleep(time.Millisecond * 25) if a := acc.NFields(); a != 1 { t.Errorf("got %v, expected %v", a, 1) } } // Test that the parser ignores invalid messages func TestRunParserInvalidMsg(t *testing.T) { n, in := newTestMQTTConsumer() acc := testutil.Accumulator{} n.acc = &acc defer close(n.done) n.parser, _ = parsers.NewInfluxParser() go n.receiver() in <- mqttMsg(invalidMsg) time.Sleep(time.Millisecond * 25) if a := acc.NFields(); a != 0 { t.Errorf("got %v, expected %v", a, 0) } } // Test that the parser parses line format messages into metrics func TestRunParserAndGather(t *testing.T) { n, in := newTestMQTTConsumer() acc := testutil.Accumulator{} n.acc = &acc defer close(n.done) n.parser, _ = parsers.NewInfluxParser() go n.receiver() in <- mqttMsg(testMsg) time.Sleep(time.Millisecond * 25) n.Gather(&acc) acc.AssertContainsFields(t, "cpu_load_short", map[string]interface{}{"value": float64(23422)}) } // Test that the parser parses graphite format messages into metrics func TestRunParserAndGatherGraphite(t *testing.T) { n, in := newTestMQTTConsumer() acc := testutil.Accumulator{} n.acc = &acc defer close(n.done) n.parser, _ = parsers.NewGraphiteParser("_", []string{}, nil) go n.receiver() in <- mqttMsg(testMsgGraphite) time.Sleep(time.Millisecond * 25) n.Gather(&acc) acc.AssertContainsFields(t, "cpu_load_short_graphite", map[string]interface{}{"value": float64(23422)}) } // Test that the parser parses json format messages into metrics func TestRunParserAndGatherJSON(t *testing.T) { n, in := newTestMQTTConsumer() acc := testutil.Accumulator{} n.acc = &acc defer close(n.done) n.parser, _ = parsers.NewJSONParser("nats_json_test", []string{}, nil) go n.receiver() in <- mqttMsg(testMsgJSON) time.Sleep(time.Millisecond * 25) n.Gather(&acc) acc.AssertContainsFields(t, "nats_json_test", map[string]interface{}{ "a": float64(5), "b_c": float64(6), }) } func mqttMsg(val string) mqtt.Message { return &message{ topic: "telegraf/unit_test", payload: []byte(val), } } // Take the message struct from the paho mqtt client library for returning // a test message interface. type message struct { duplicate bool qos byte retained bool topic string messageID uint16 payload []byte } func (m *message) Duplicate() bool { return m.duplicate } func (m *message) Qos() byte { return m.qos } func (m *message) Retained() bool { return m.retained } func (m *message) Topic() string { return m.topic } func (m *message) MessageID() uint16 { return m.messageID } func (m *message) Payload() []byte { return m.payload }