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312 lines
7.7 KiB
312 lines
7.7 KiB
// Copyright 2013 Ooyala, Inc.
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package statsd
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import (
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"fmt"
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"io"
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"net"
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"reflect"
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"strings"
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"testing"
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)
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var dogstatsdTests = []struct {
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GlobalNamespace string
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GlobalTags []string
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Method string
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Metric string
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Value interface{}
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Tags []string
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Rate float64
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Expected string
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}{
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{"", nil, "Gauge", "test.gauge", 1.0, nil, 1.0, "test.gauge:1.000000|g"},
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{"", nil, "Gauge", "test.gauge", 1.0, nil, 0.999999, "test.gauge:1.000000|g|@0.999999"},
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{"", nil, "Gauge", "test.gauge", 1.0, []string{"tagA"}, 1.0, "test.gauge:1.000000|g|#tagA"},
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{"", nil, "Gauge", "test.gauge", 1.0, []string{"tagA", "tagB"}, 1.0, "test.gauge:1.000000|g|#tagA,tagB"},
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{"", nil, "Gauge", "test.gauge", 1.0, []string{"tagA"}, 0.999999, "test.gauge:1.000000|g|@0.999999|#tagA"},
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{"", nil, "Count", "test.count", int64(1), []string{"tagA"}, 1.0, "test.count:1|c|#tagA"},
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{"", nil, "Count", "test.count", int64(-1), []string{"tagA"}, 1.0, "test.count:-1|c|#tagA"},
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{"", nil, "Histogram", "test.histogram", 2.3, []string{"tagA"}, 1.0, "test.histogram:2.300000|h|#tagA"},
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{"", nil, "Set", "test.set", "uuid", []string{"tagA"}, 1.0, "test.set:uuid|s|#tagA"},
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{"flubber.", nil, "Set", "test.set", "uuid", []string{"tagA"}, 1.0, "flubber.test.set:uuid|s|#tagA"},
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{"", []string{"tagC"}, "Set", "test.set", "uuid", []string{"tagA"}, 1.0, "test.set:uuid|s|#tagC,tagA"},
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}
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func assertNotPanics(t *testing.T, f func()) {
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defer func() {
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if r := recover(); r != nil {
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t.Fatal(r)
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}
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}()
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f()
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}
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func TestClient(t *testing.T) {
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addr := "localhost:1201"
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udpAddr, err := net.ResolveUDPAddr("udp", addr)
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if err != nil {
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t.Fatal(err)
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}
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server, err := net.ListenUDP("udp", udpAddr)
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if err != nil {
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t.Fatal(err)
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}
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defer server.Close()
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client, err := New(addr)
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if err != nil {
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t.Fatal(err)
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}
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for _, tt := range dogstatsdTests {
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client.Namespace = tt.GlobalNamespace
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client.Tags = tt.GlobalTags
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method := reflect.ValueOf(client).MethodByName(tt.Method)
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e := method.Call([]reflect.Value{
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reflect.ValueOf(tt.Metric),
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reflect.ValueOf(tt.Value),
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reflect.ValueOf(tt.Tags),
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reflect.ValueOf(tt.Rate)})[0]
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errInter := e.Interface()
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if errInter != nil {
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t.Fatal(errInter.(error))
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}
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bytes := make([]byte, 1024)
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n, err := server.Read(bytes)
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if err != nil {
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t.Fatal(err)
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}
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message := bytes[:n]
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if string(message) != tt.Expected {
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t.Errorf("Expected: %s. Actual: %s", tt.Expected, string(message))
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}
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}
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}
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func TestBufferedClient(t *testing.T) {
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addr := "localhost:1201"
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udpAddr, err := net.ResolveUDPAddr("udp", addr)
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if err != nil {
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t.Fatal(err)
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}
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server, err := net.ListenUDP("udp", udpAddr)
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if err != nil {
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t.Fatal(err)
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}
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defer server.Close()
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conn, err := net.DialUDP("udp", nil, udpAddr)
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if err != nil {
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t.Fatal(err)
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}
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bufferLength := 5
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client := &Client{
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conn: conn,
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commands: make([]string, 0, bufferLength),
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bufferLength: bufferLength,
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}
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client.Namespace = "foo."
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client.Tags = []string{"dd:2"}
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client.Count("cc", 1, nil, 1)
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client.Gauge("gg", 10, nil, 1)
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client.Histogram("hh", 1, nil, 1)
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client.Set("ss", "ss", nil, 1)
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if len(client.commands) != 4 {
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t.Errorf("Expected client to have buffered 4 commands, but found %d\n", len(client.commands))
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}
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client.Set("ss", "xx", nil, 1)
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err = client.flush()
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if err != nil {
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t.Errorf("Error sending: %s", err)
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}
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if len(client.commands) != 0 {
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t.Errorf("Expecting send to flush commands, but found %d\n", len(client.commands))
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}
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buffer := make([]byte, 4096)
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n, err := io.ReadAtLeast(server, buffer, 1)
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result := string(buffer[:n])
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if err != nil {
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t.Error(err)
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}
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expected := []string{
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`foo.cc:1|c|#dd:2`,
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`foo.gg:10.000000|g|#dd:2`,
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`foo.hh:1.000000|h|#dd:2`,
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`foo.ss:ss|s|#dd:2`,
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`foo.ss:xx|s|#dd:2`,
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}
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for i, res := range strings.Split(result, "\n") {
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if res != expected[i] {
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t.Errorf("Got `%s`, expected `%s`", res, expected[i])
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}
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}
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client.Event(&Event{Title: "title1", Text: "text1", Priority: Normal, AlertType: Success, Tags: []string{"tagg"}})
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client.SimpleEvent("event1", "text1")
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if len(client.commands) != 2 {
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t.Errorf("Expected to find %d commands, but found %d\n", 2, len(client.commands))
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}
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err = client.flush()
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if err != nil {
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t.Errorf("Error sending: %s", err)
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}
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if len(client.commands) != 0 {
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t.Errorf("Expecting send to flush commands, but found %d\n", len(client.commands))
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}
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buffer = make([]byte, 1024)
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n, err = io.ReadAtLeast(server, buffer, 1)
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result = string(buffer[:n])
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if err != nil {
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t.Error(err)
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}
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if n == 0 {
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t.Errorf("Read 0 bytes but expected more.")
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}
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expected = []string{
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`_e{6,5}:title1|text1|p:normal|t:success|#dd:2,tagg`,
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`_e{6,5}:event1|text1|#dd:2`,
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}
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for i, res := range strings.Split(result, "\n") {
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if res != expected[i] {
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t.Errorf("Got `%s`, expected `%s`", res, expected[i])
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}
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}
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}
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func TestNilSafe(t *testing.T) {
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var c *Client
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assertNotPanics(t, func() { c.Close() })
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assertNotPanics(t, func() { c.Count("", 0, nil, 1) })
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assertNotPanics(t, func() { c.Histogram("", 0, nil, 1) })
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assertNotPanics(t, func() { c.Gauge("", 0, nil, 1) })
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assertNotPanics(t, func() { c.Set("", "", nil, 1) })
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assertNotPanics(t, func() { c.send("", "", nil, 1) })
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}
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func TestEvents(t *testing.T) {
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matrix := []struct {
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event *Event
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encoded string
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}{
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{
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NewEvent("Hello", "Something happened to my event"),
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`_e{5,30}:Hello|Something happened to my event`,
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}, {
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&Event{Title: "hi", Text: "okay", AggregationKey: "foo"},
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`_e{2,4}:hi|okay|k:foo`,
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}, {
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&Event{Title: "hi", Text: "okay", AggregationKey: "foo", AlertType: Info},
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`_e{2,4}:hi|okay|k:foo|t:info`,
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}, {
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&Event{Title: "hi", Text: "w/e", AlertType: Error, Priority: Normal},
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`_e{2,3}:hi|w/e|p:normal|t:error`,
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}, {
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&Event{Title: "hi", Text: "uh", Tags: []string{"host:foo", "app:bar"}},
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`_e{2,2}:hi|uh|#host:foo,app:bar`,
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},
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}
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for _, m := range matrix {
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r, err := m.event.Encode()
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if err != nil {
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t.Errorf("Error encoding: %s\n", err)
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continue
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}
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if r != m.encoded {
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t.Errorf("Expected `%s`, got `%s`\n", m.encoded, r)
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}
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}
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e := NewEvent("", "hi")
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if _, err := e.Encode(); err == nil {
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t.Errorf("Expected error on empty Title.")
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}
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e = NewEvent("hi", "")
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if _, err := e.Encode(); err == nil {
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t.Errorf("Expected error on empty Text.")
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}
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e = NewEvent("hello", "world")
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s, err := e.Encode("tag1", "tag2")
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if err != nil {
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t.Error(err)
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}
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expected := "_e{5,5}:hello|world|#tag1,tag2"
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if s != expected {
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t.Errorf("Expected %s, got %s", expected, s)
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}
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if len(e.Tags) != 0 {
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t.Errorf("Modified event in place illegally.")
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}
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}
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// These benchmarks show that using a buffer instead of sprintf-ing together
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// a bunch of intermediate strings is 4-5x faster
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func BenchmarkFormatNew(b *testing.B) {
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b.StopTimer()
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c := &Client{}
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c.Namespace = "foo.bar."
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c.Tags = []string{"app:foo", "host:bar"}
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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c.format("system.cpu.idle", "10", []string{"foo"}, 1)
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c.format("system.cpu.load", "0.1", nil, 0.9)
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}
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}
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// Old formatting function, added to client for tests
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func (c *Client) formatOld(name, value string, tags []string, rate float64) string {
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if rate < 1 {
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value = fmt.Sprintf("%s|@%f", value, rate)
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}
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if c.Namespace != "" {
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name = fmt.Sprintf("%s%s", c.Namespace, name)
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}
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tags = append(c.Tags, tags...)
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if len(tags) > 0 {
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value = fmt.Sprintf("%s|#%s", value, strings.Join(tags, ","))
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}
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return fmt.Sprintf("%s:%s", name, value)
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}
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func BenchmarkFormatOld(b *testing.B) {
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b.StopTimer()
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c := &Client{}
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c.Namespace = "foo.bar."
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c.Tags = []string{"app:foo", "host:bar"}
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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c.formatOld("system.cpu.idle", "10", []string{"foo"}, 1)
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c.formatOld("system.cpu.load", "0.1", nil, 0.9)
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}
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}
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