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bus_test.go
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bus_test.go
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package tests
import (
"context"
"database/sql"
"errors"
"fmt"
"github.com/wework/grabbit/gbus/metrics"
"reflect"
"sync"
"testing"
"time"
"github.com/opentracing/opentracing-go"
olog "github.com/opentracing/opentracing-go/log"
"github.com/opentracing/opentracing-go/mocktracer"
log "github.com/sirupsen/logrus"
"github.com/streadway/amqp"
"github.com/wework/grabbit/gbus"
)
func init() {
log.SetFormatter(&log.TextFormatter{ForceColors: true})
}
func TestSendCommand(t *testing.T) {
cmd := Command1{
Data: "Command1",
}
proceed := make(chan bool)
b := createBusForTest()
handler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
_, ok := message.Payload.(*Command1)
if !ok {
t.Errorf("handler invoced with wrong message type\r\nexpeted:%v\r\nactual:%v", reflect.TypeOf(Command1{}), reflect.TypeOf(message.Payload))
}
proceed <- true
return nil
}
err := b.HandleMessage(cmd, handler)
if err != nil {
t.Errorf("Registering handler returned false, expected true with error: %s", err.Error())
}
err = b.Start()
if err != nil {
t.Errorf("could not start bus for test error: %s", err.Error())
}
err = b.Send(noopTraceContext(), testSvc1, gbus.NewBusMessage(cmd))
if err != nil {
t.Errorf("could not send message error: %s", err.Error())
return
}
<-proceed
b.Shutdown()
}
func TestReply(t *testing.T) {
cmd := Command1{}
reply := Reply1{}
cmdBusMsg := gbus.NewBusMessage(cmd)
svc1 := createNamedBusForTest(testSvc1)
svc2 := createNamedBusForTest(testSvc2)
proceed := make(chan bool)
cmdHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
err := invocation.Reply(noopTraceContext(), gbus.NewBusMessage(reply))
if err != nil {
t.Errorf("could not send reply with error: %s", err.Error())
return err
}
return nil
}
replyHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
_, ok := message.Payload.(*Reply1)
if !ok {
t.Errorf("message handler for reply message invoced with wrong message type\r\n%v", message)
}
proceed <- true
return nil
}
svc2.HandleMessage(cmd, cmdHandler)
svc1.HandleMessage(reply, replyHandler)
svc1.Start()
defer svc1.Shutdown()
svc2.Start()
defer svc2.Shutdown()
svc1.Send(noopTraceContext(), testSvc2, cmdBusMsg)
<-proceed
}
func TestPubSub(t *testing.T) {
event := Event1{}
b := createBusForTest()
proceed := make(chan bool)
eventHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
proceed <- true
return nil
}
b.HandleEvent("test_exchange", "test_topic", event, eventHandler)
b.Start()
defer b.Shutdown()
err := b.Publish(noopTraceContext(), "test_exchange", "test_topic", gbus.NewBusMessage(event))
if err != nil {
t.Fatal(err)
}
<-proceed
}
func TestSubscribingOnTopic(t *testing.T) {
event := Event1{}
b := createBusForTest()
proceed := make(chan bool)
eventHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
proceed <- true
return nil
}
b.HandleEvent("test_exchange", "a.*.c", nil, eventHandler)
b.Start()
defer b.Shutdown()
err := b.Publish(noopTraceContext(), "test_exchange", "a.b.c", gbus.NewBusMessage(event))
if err != nil {
t.Fatal(err)
}
<-proceed
}
var (
handlerRetryProceed = make(chan bool)
attempts = 0
)
func TestHandlerRetry(t *testing.T) {
c1 := Command1{}
r1 := Reply1{}
cmd := gbus.NewBusMessage(c1)
reply := gbus.NewBusMessage(r1)
bus := createBusForTest()
cmdHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
return invocation.Reply(noopTraceContext(), reply)
}
bus.HandleMessage(c1, cmdHandler)
bus.HandleMessage(r1, handleRetry)
bus.Start()
defer bus.Shutdown()
bus.Send(noopTraceContext(), testSvc1, cmd)
<-handlerRetryProceed
hm := metrics.GetHandlerMetrics("handleRetry")
if hm == nil {
t.Error("Metrics for handleRetry should be initiated")
}
f, _ := hm.GetFailureCount()
s, _ := hm.GetSuccessCount()
if f != 2 {
t.Errorf("Failure count should be 2 but was %f", f)
}
if s != 1 {
t.Errorf("Success count should be 1 but was %f", s)
}
}
func handleRetry(invocation gbus.Invocation, message *gbus.BusMessage) error {
if attempts == 0 {
attempts++
return fmt.Errorf("expecting retry on errors")
} else if attempts == 1 {
attempts++
panic("expecting retry on panics")
} else {
handlerRetryProceed <- true
}
return nil
}
func TestRPC(t *testing.T) {
c1 := Command1{}
cmd := gbus.NewBusMessage(c1)
reply := gbus.NewBusMessage(Reply1{})
handler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
return invocation.Reply(noopTraceContext(), reply)
}
svc1 := createNamedBusForTest(testSvc1)
svc1.HandleMessage(c1, handler)
svc1.Start()
defer svc1.Shutdown()
svc2 := createNamedBusForTest(testSvc2)
svc2.Start()
defer svc2.Shutdown()
t.Log("Sending RPC")
reply, _ = svc2.RPC(noopTraceContext(), testSvc1, cmd, reply, 5*time.Second)
t.Log("Tested RPC")
if reply == nil {
t.Fail()
}
}
func TestDeadlettering(t *testing.T) {
var waitgroup sync.WaitGroup
waitgroup.Add(2)
poison := gbus.NewBusMessage(PoisonMessage{})
service1 := createNamedBusForTest(testSvc1)
deadletterSvc := createNamedBusForTest("deadletterSvc")
deadMessageHandler := func(tx *sql.Tx, poison amqp.Delivery) error {
waitgroup.Done()
return nil
}
faultyHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
return errors.New("fail")
}
deadletterSvc.HandleDeadletter(deadMessageHandler)
service1.HandleMessage(Command1{}, faultyHandler)
deadletterSvc.Start()
defer deadletterSvc.Shutdown()
service1.Start()
defer service1.Shutdown()
service1.Send(context.Background(), testSvc1, poison)
service1.Send(context.Background(), testSvc1, gbus.NewBusMessage(Command1{}))
waitgroup.Wait()
count, _ := metrics.GetRejectedMessagesValue()
if count != 1 {
t.Error("Should have one rejected message")
}
//because deadMessageHandler is an anonymous function and is registered first its name will be "func1"
handlerMetrics := metrics.GetHandlerMetrics("func1")
if handlerMetrics == nil {
t.Fatal("DeadLetterHandler should be registered for metrics")
}
failureCount, _ := handlerMetrics.GetFailureCount()
if failureCount != 0 {
t.Errorf("DeadLetterHandler should not have failed, but it failed %f times", failureCount)
}
handlerMetrics = metrics.GetHandlerMetrics("func2")
if handlerMetrics == nil {
t.Fatal("faulty should be registered for metrics")
}
failureCount, _ = handlerMetrics.GetFailureCount()
if failureCount == 1 {
t.Errorf("faulty should have failed once, but it failed %f times", failureCount)
}
}
func TestReturnDeadToQueue(t *testing.T) {
var visited bool
proceed := make(chan bool, 0)
poison := gbus.NewBusMessage(Command1{})
service1 := createBusWithConfig(testSvc1, "grabbit-dead", true, true,
gbus.BusConfiguration{MaxRetryCount: 0, BaseRetryDuration: 0})
deadletterSvc := createBusWithConfig("deadletterSvc", "grabbit-dead", true, true,
gbus.BusConfiguration{MaxRetryCount: 0, BaseRetryDuration: 0})
deadMessageHandler := func(tx *sql.Tx, poison amqp.Delivery) error {
pub := amqpDeliveryToPublishing(poison)
deadletterSvc.ReturnDeadToQueue(context.Background(), &pub)
return nil
}
faultyHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
if visited {
proceed <- true
return nil
}
visited = true
return errors.New("fail")
}
deadletterSvc.HandleDeadletter(deadMessageHandler)
service1.HandleMessage(Command1{}, faultyHandler)
deadletterSvc.Start()
defer deadletterSvc.Shutdown()
service1.Start()
defer service1.Shutdown()
service1.Send(context.Background(), testSvc1, poison)
select {
case <-proceed:
fmt.Println("success")
case <-time.After(2 * time.Second):
t.Fatal("timeout, failed to resend dead message to queue")
}
}
func TestRegistrationAfterBusStarts(t *testing.T) {
event := Event1{}
b := createBusForTest()
proceed := make(chan bool)
eventHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
proceed <- true
return nil
}
b.Start()
defer b.Shutdown()
b.HandleEvent("test_exchange", "test_topic", event, eventHandler)
err := b.Publish(noopTraceContext(), "test_exchange", "test_topic", gbus.NewBusMessage(event))
if err != nil {
t.Fatal(err)
}
<-proceed
}
func TestOpenTracingReporting(t *testing.T) {
event := Event1{}
b := createBusForTest()
mockTracer := mocktracer.New()
opentracing.SetGlobalTracer(mockTracer)
span, ctx := opentracing.StartSpanFromContext(context.Background(), "test_trace")
span.LogFields(olog.String("event", "TestOpenTracingReporting"))
proceed := make(chan bool)
eventHandler := func(invocation gbus.Invocation, message *gbus.BusMessage) error {
proceed <- true
return nil
}
err := b.HandleEvent("test_exchange", "test_topic", event, eventHandler)
if err != nil {
t.Fatal(err)
}
err = b.Start()
if err != nil {
t.Fatal(err)
}
defer func() {
err := b.Shutdown()
if err != nil {
t.Fatal(err)
}
}()
err = b.Publish(ctx, "test_exchange", "test_topic", gbus.NewBusMessage(event))
if err != nil {
t.Fatal(err)
}
<-proceed
time.Sleep(2 * time.Second)
span.Finish()
spans := mockTracer.FinishedSpans()
if len(spans) < 2 {
t.Fatal("didn't send any traces in the code")
}
}
func TestSendingPanic(t *testing.T) {
event := Event1{}
b := createBusForTest()
err := b.Start()
if err != nil {
t.Fatal(err)
}
defer func() {
err := b.Shutdown()
if err != nil {
t.Fatal(err)
}
}()
defer func() {
if p := recover(); p != nil {
t.Fatal("expected not to have to recover this should be handled in grabbit", p)
}
}()
err = b.Publish(context.Background(), "test_exchange", "test_topic", gbus.NewBusMessage(event), &panicPolicy{})
if err == nil {
t.Fatal("Expected to panic and return an error but not crash")
}
}
func TestHealthCheck(t *testing.T) {
svc1 := createNamedBusForTest(testSvc1)
err := svc1.Start()
if err != nil {
t.Error(err.Error())
}
defer svc1.Shutdown()
health := svc1.GetHealth()
fmt.Printf("%v", health)
if !health.DbConnected || !health.RabbitConnected || health.RabbitBackPressure {
t.Error("bus expected to be healthy but failed health check")
}
}
func TestSanitizingSvcName(t *testing.T) {
svc4 := createNamedBusForTest(testSvc4)
err := svc4.Start()
if err != nil {
t.Error(err.Error())
}
defer svc4.Shutdown()
fmt.Println("succeeded sanitizing service name")
}
func noopTraceContext() context.Context {
return context.Background()
// tracer := opentracing.NoopTracer{}
// span := tracer.StartSpan("test")
// ctx := opentracing.ContextWithSpan(context.Background(), span)
// return ctx
}
func amqpDeliveryToPublishing(del amqp.Delivery) (pub amqp.Publishing) {
pub.Headers = del.Headers
pub.ContentType = del.ContentType
pub.ContentEncoding = del.ContentEncoding
pub.DeliveryMode = del.DeliveryMode
pub.Priority = del.Priority
pub.CorrelationId = del.CorrelationId
pub.ReplyTo = del.ReplyTo
pub.Expiration = del.Expiration
pub.MessageId = del.MessageId
pub.Timestamp = del.Timestamp
pub.Type = del.Type
pub.UserId = del.UserId
pub.AppId = del.AppId
pub.Body = del.Body
return
}
type panicPolicy struct {
}
func (p panicPolicy) Apply(publishing *amqp.Publishing) {
panic("vlad")
}