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// Copyright 2022-2023 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package micro_test
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"math/rand"
"reflect"
"sync"
"testing"
"time"
"github.com/nats-io/nats-server/v2/server"
"github.com/nats-io/nats.go"
"github.com/nats-io/nats.go/micro"
natsserver "github.com/nats-io/nats-server/v2/test"
)
func TestServiceBasics(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
// Stub service.
doAdd := func(req micro.Request) {
if rand.Intn(10) == 0 {
if err := req.Error("500", "Unexpected error!", nil); err != nil {
t.Fatalf("Unexpected error when sending error response: %v", err)
}
return
}
// Happy Path.
// Random delay between 5-10ms
time.Sleep(5*time.Millisecond + time.Duration(rand.Intn(5))*time.Millisecond)
if err := req.Respond([]byte("42")); err != nil {
if err := req.Error("500", "Unexpected error!", nil); err != nil {
t.Fatalf("Unexpected error when sending error response: %v", err)
}
return
}
}
var svcs []micro.Service
// Create 5 service responders.
config := micro.Config{
Name: "CoolAddService",
Version: "0.1.0",
Description: "Add things together",
Metadata: map[string]string{"basic": "metadata"},
Endpoint: µ.EndpointConfig{
Subject: "svc.add",
Handler: micro.HandlerFunc(doAdd),
},
}
for i := 0; i < 5; i++ {
svc, err := micro.AddService(nc, config)
if err != nil {
t.Fatalf("Expected to create Service, got %v", err)
}
defer svc.Stop()
svcs = append(svcs, svc)
}
// Now send 50 requests.
for i := 0; i < 50; i++ {
_, err := nc.Request("svc.add", []byte(`{ "x": 22, "y": 11 }`), time.Second)
if err != nil {
t.Fatalf("Expected a response, got %v", err)
}
}
for _, svc := range svcs {
info := svc.Info()
if info.Name != "CoolAddService" {
t.Fatalf("Expected %q, got %q", "CoolAddService", info.Name)
}
if len(info.Description) == 0 || len(info.Version) == 0 {
t.Fatalf("Expected non empty description and version")
}
if !reflect.DeepEqual(info.Metadata, map[string]string{"basic": "metadata"}) {
t.Fatalf("invalid metadata: %v", info.Metadata)
}
}
// Make sure we can request info, 1 response.
// This could be exported as well as main ServiceImpl.
subj, err := micro.ControlSubject(micro.InfoVerb, "CoolAddService", "")
if err != nil {
t.Fatalf("Failed to building info subject %v", err)
}
info, err := nc.Request(subj, nil, time.Second)
if err != nil {
t.Fatalf("Expected a response, got %v", err)
}
var inf micro.Info
if err := json.Unmarshal(info.Data, &inf); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// Ping all services. Multiple responses.
inbox := nats.NewInbox()
sub, err := nc.SubscribeSync(inbox)
if err != nil {
t.Fatalf("subscribe failed: %s", err)
}
pingSubject, err := micro.ControlSubject(micro.PingVerb, "CoolAddService", "")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if err := nc.PublishRequest(pingSubject, inbox, nil); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
var pingCount int
for {
_, err := sub.NextMsg(250 * time.Millisecond)
if err != nil {
break
}
pingCount++
}
if pingCount != 5 {
t.Fatalf("Expected 5 ping responses, got: %d", pingCount)
}
// Get stats from all services
statsInbox := nats.NewInbox()
sub, err = nc.SubscribeSync(statsInbox)
if err != nil {
t.Fatalf("subscribe failed: %s", err)
}
statsSubject, err := micro.ControlSubject(micro.StatsVerb, "CoolAddService", "")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if err := nc.PublishRequest(statsSubject, statsInbox, nil); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
stats := make([]micro.Stats, 0)
var requestsNum int
for {
resp, err := sub.NextMsg(250 * time.Millisecond)
if err != nil {
break
}
var srvStats micro.Stats
if err := json.Unmarshal(resp.Data, &srvStats); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
requestsNum += srvStats.Endpoints[0].NumRequests
stats = append(stats, srvStats)
}
if len(stats) != 5 {
t.Fatalf("Expected stats for 5 services, got: %d", len(stats))
}
// Services should process 50 requests total
if requestsNum != 50 {
t.Fatalf("Expected a total of 50 requests processed, got: %d", requestsNum)
}
// Reset stats for a service
svcs[0].Reset()
if svcs[0].Stats().Endpoints[0].NumRequests != 0 {
t.Fatalf("Expected empty stats after reset; got: %+v", svcs[0].Stats())
}
}
func TestAddService(t *testing.T) {
testHandler := func(micro.Request) {}
errNats := make(chan struct{})
errService := make(chan struct{})
closedNats := make(chan struct{})
doneService := make(chan struct{})
tests := []struct {
name string
givenConfig micro.Config
endpoints []string
natsClosedHandler nats.ConnHandler
natsErrorHandler nats.ErrHandler
asyncErrorSubject string
expectedPing micro.Ping
withError error
}{
{
name: "minimal config",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{"basic": "metadata"},
},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{"basic": "metadata"},
},
},
},
{
name: "with single base endpoint",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
Endpoint: µ.EndpointConfig{
Subject: "test",
Handler: micro.HandlerFunc(testHandler),
Metadata: map[string]string{"basic": "endpoint_metadata"},
},
},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
},
{
name: "with base endpoint and additional endpoints",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
Endpoint: µ.EndpointConfig{
Subject: "test",
Handler: micro.HandlerFunc(testHandler),
},
},
endpoints: []string{"func1", "func2", "func3"},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
},
{
name: "with done handler, no handlers on nats connection",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
DoneHandler: func(micro.Service) {
doneService <- struct{}{}
},
},
endpoints: []string{"func"},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
},
{
name: "with error handler, no handlers on nats connection",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
ErrorHandler: func(micro.Service, *micro.NATSError) {
errService <- struct{}{}
},
},
endpoints: []string{"func"},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
asyncErrorSubject: "func",
},
{
name: "with error handler, no handlers on nats connection, error on monitoring subject",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
ErrorHandler: func(micro.Service, *micro.NATSError) {
errService <- struct{}{}
},
},
endpoints: []string{"func"},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
asyncErrorSubject: "$SRV.PING.test_service",
},
{
name: "with done handler, append to nats handlers",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
DoneHandler: func(micro.Service) {
doneService <- struct{}{}
},
},
endpoints: []string{"func"},
natsClosedHandler: func(c *nats.Conn) {
closedNats <- struct{}{}
},
natsErrorHandler: func(*nats.Conn, *nats.Subscription, error) {
errNats <- struct{}{}
},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
asyncErrorSubject: "test.sub",
},
{
name: "with error handler, append to nats handlers",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
DoneHandler: func(micro.Service) {
doneService <- struct{}{}
},
},
endpoints: []string{"func"},
natsClosedHandler: func(c *nats.Conn) {
closedNats <- struct{}{}
},
natsErrorHandler: func(*nats.Conn, *nats.Subscription, error) {
errNats <- struct{}{}
},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
},
{
name: "with error handler, append to nats handlers, error on monitoring subject",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.1.0",
DoneHandler: func(micro.Service) {
doneService <- struct{}{}
},
},
endpoints: []string{"func"},
natsClosedHandler: func(c *nats.Conn) {
closedNats <- struct{}{}
},
natsErrorHandler: func(*nats.Conn, *nats.Subscription, error) {
errNats <- struct{}{}
},
expectedPing: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
Metadata: map[string]string{},
},
},
asyncErrorSubject: "$SRV.PING.TEST_SERVICE",
},
{
name: "validation error, invalid service name",
givenConfig: micro.Config{
Name: "test_service!",
Version: "0.1.0",
},
endpoints: []string{"func"},
withError: micro.ErrConfigValidation,
},
{
name: "validation error, invalid version",
givenConfig: micro.Config{
Name: "test_service",
Version: "abc",
},
endpoints: []string{"func"},
withError: micro.ErrConfigValidation,
},
{
name: "validation error, invalid endpoint subject",
givenConfig: micro.Config{
Name: "test_service",
Version: "0.0.1",
Endpoint: µ.EndpointConfig{
Subject: "endpoint subject",
},
},
withError: micro.ErrConfigValidation,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL(),
nats.ErrorHandler(test.natsErrorHandler),
nats.ClosedHandler(test.natsClosedHandler),
)
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
// cleanup handlers since we invoke them manually
defer nc.SetClosedHandler(nil)
defer nc.SetErrorHandler(nil)
srv, err := micro.AddService(nc, test.givenConfig)
if test.withError != nil {
if !errors.Is(err, test.withError) {
t.Fatalf("Expected error: %v; got: %v", test.withError, err)
}
return
}
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
for _, endpoint := range test.endpoints {
if err := srv.AddEndpoint(endpoint, micro.HandlerFunc(testHandler)); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
info := srv.Info()
subjectsNum := len(test.endpoints)
if test.givenConfig.Endpoint != nil {
subjectsNum += 1
}
if subjectsNum != len(info.Endpoints) {
t.Fatalf("Invalid number of registered endpoints; want: %d; got: %d", subjectsNum, len(info.Endpoints))
}
pingSubject, err := micro.ControlSubject(micro.PingVerb, info.Name, info.ID)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
pingResp, err := nc.Request(pingSubject, nil, 1*time.Second)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
var ping micro.Ping
if err := json.Unmarshal(pingResp.Data, &ping); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
test.expectedPing.ID = info.ID
if !reflect.DeepEqual(test.expectedPing, ping) {
t.Fatalf("Invalid ping response; want: %+v; got: %+v", test.expectedPing, ping)
}
if test.givenConfig.DoneHandler != nil {
go nc.Opts.ClosedCB(nc)
select {
case <-doneService:
case <-time.After(1 * time.Second):
t.Fatalf("Timeout on DoneHandler")
}
if test.natsClosedHandler != nil {
select {
case <-closedNats:
case <-time.After(1 * time.Second):
t.Fatalf("Timeout on ClosedHandler")
}
}
}
if test.givenConfig.ErrorHandler != nil {
go nc.Opts.AsyncErrorCB(nc, &nats.Subscription{Subject: test.asyncErrorSubject}, errors.New("oops"))
select {
case <-errService:
case <-time.After(1 * time.Second):
t.Fatalf("Timeout on ErrorHandler")
}
if test.natsErrorHandler != nil {
select {
case <-errNats:
case <-time.After(1 * time.Second):
t.Fatalf("Timeout on AsyncErrHandler")
}
}
}
if err := srv.Stop(); err != nil {
t.Fatalf("Unexpected error when stopping the service: %v", err)
}
if test.natsClosedHandler != nil {
go nc.Opts.ClosedCB(nc)
select {
case <-doneService:
t.Fatalf("Expected to restore nats closed handler")
case <-time.After(50 * time.Millisecond):
}
select {
case <-closedNats:
case <-time.After(1 * time.Second):
t.Fatalf("Timeout on ClosedHandler")
}
}
if test.natsErrorHandler != nil {
go nc.Opts.AsyncErrorCB(nc, &nats.Subscription{Subject: test.asyncErrorSubject}, errors.New("oops"))
select {
case <-errService:
t.Fatalf("Expected to restore nats error handler")
case <-time.After(50 * time.Millisecond):
}
select {
case <-errNats:
case <-time.After(1 * time.Second):
t.Fatalf("Timeout on AsyncErrHandler")
}
}
})
}
}
func TestErrHandlerSubjectMatch(t *testing.T) {
tests := []struct {
name string
endpointSubject string
errSubject string
expectServiceErr bool
}{
{
name: "exact match",
endpointSubject: "foo.bar.baz",
errSubject: "foo.bar.baz",
expectServiceErr: true,
},
{
name: "match with *",
endpointSubject: "foo.*.baz",
errSubject: "foo.bar.baz",
expectServiceErr: true,
},
{
name: "match with >",
endpointSubject: "foo.bar.>",
errSubject: "foo.bar.baz.1",
expectServiceErr: true,
},
{
name: "monitoring handler",
endpointSubject: "foo.bar.>",
errSubject: "$SRV.PING",
expectServiceErr: true,
},
{
name: "endpoint longer than subject",
endpointSubject: "foo.bar.baz",
errSubject: "foo.bar",
expectServiceErr: false,
},
{
name: "no match",
endpointSubject: "foo.bar.baz",
errSubject: "foo.baz.bar",
expectServiceErr: false,
},
{
name: "no match with *",
endpointSubject: "foo.*.baz",
errSubject: "foo.bar.foo",
expectServiceErr: false,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
coreNatsAsyncErrors := []nats.ErrHandler{nil, func(c *nats.Conn, s *nats.Subscription, err error) {}}
for _, cb := range coreNatsAsyncErrors {
errChan := make(chan struct{})
errHandler := func(s micro.Service, err *micro.NATSError) {
errChan <- struct{}{}
}
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
nc.SetErrorHandler(cb)
svc, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
ErrorHandler: micro.ErrHandler(errHandler),
Endpoint: µ.EndpointConfig{
Subject: test.endpointSubject,
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer svc.Stop()
go nc.Opts.AsyncErrorCB(nc, &nats.Subscription{Subject: test.errSubject}, errors.New("oops"))
if test.expectServiceErr {
select {
case <-errChan:
case <-time.After(10 * time.Millisecond):
t.Fatalf("Expected service error callback")
}
} else {
select {
case <-errChan:
t.Fatalf("Expected no service error callback")
case <-time.After(10 * time.Millisecond):
}
}
}
})
}
}
func TestGroups(t *testing.T) {
tests := []struct {
name string
endpointName string
groups []string
expectedEndpoint micro.EndpointInfo
}{
{
name: "no groups",
endpointName: "foo",
expectedEndpoint: micro.EndpointInfo{
Name: "foo",
Subject: "foo",
QueueGroup: "q",
},
},
{
name: "single group",
endpointName: "foo",
groups: []string{"g1"},
expectedEndpoint: micro.EndpointInfo{
Name: "foo",
Subject: "g1.foo",
QueueGroup: "q",
},
},
{
name: "single empty group",
endpointName: "foo",
groups: []string{""},
expectedEndpoint: micro.EndpointInfo{
Name: "foo",
Subject: "foo",
QueueGroup: "q",
},
},
{
name: "empty groups",
endpointName: "foo",
groups: []string{"", "g1", ""},
expectedEndpoint: micro.EndpointInfo{
Name: "foo",
Subject: "g1.foo",
QueueGroup: "q",
},
},
{
name: "multiple groups",
endpointName: "foo",
groups: []string{"g1", "g2", "g3"},
expectedEndpoint: micro.EndpointInfo{
Name: "foo",
Subject: "g1.g2.g3.foo",
QueueGroup: "q",
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
srv, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer srv.Stop()
if len(test.groups) > 0 {
group := srv.AddGroup(test.groups[0])
for _, g := range test.groups[1:] {
group = group.AddGroup(g)
}
err = group.AddEndpoint(test.endpointName, micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
} else {
err = srv.AddEndpoint(test.endpointName, micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
info := srv.Info()
if len(info.Endpoints) != 1 {
t.Fatalf("Expected 1 registered endpoint; got: %d", len(info.Endpoints))
}
if !reflect.DeepEqual(info.Endpoints[0], test.expectedEndpoint) {
t.Fatalf("Invalid endpoint; want: %s, got: %s", test.expectedEndpoint, info.Endpoints[0])
}
})
}
}
func TestMonitoringHandlers(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
asyncErr := make(chan struct{})
errHandler := func(s micro.Service, n *micro.NATSError) {
asyncErr <- struct{}{}
}
config := micro.Config{
Name: "test_service",
Version: "0.1.0",
ErrorHandler: errHandler,
Endpoint: µ.EndpointConfig{
Subject: "test.func",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
Metadata: map[string]string{"basic": "schema"},
},
}
srv, err := micro.AddService(nc, config)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer func() {
srv.Stop()
if !srv.Stopped() {
t.Fatalf("Expected service to be stopped")
}
}()
info := srv.Info()
tests := []struct {
name string
subject string
withError bool
expectedResponse any
}{
{
name: "PING all",
subject: "$SRV.PING",
expectedResponse: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
ID: info.ID,
Metadata: map[string]string{},
},
},
},
{
name: "PING name",
subject: "$SRV.PING.test_service",
expectedResponse: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
ID: info.ID,
Metadata: map[string]string{},
},
},
},
{
name: "PING ID",
subject: fmt.Sprintf("$SRV.PING.test_service.%s", info.ID),
expectedResponse: micro.Ping{
Type: micro.PingResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
ID: info.ID,
Metadata: map[string]string{},
},
},
},
{
name: "INFO all",
subject: "$SRV.INFO",
expectedResponse: micro.Info{
Type: micro.InfoResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
ID: info.ID,
Metadata: map[string]string{},
},
Endpoints: []micro.EndpointInfo{
{
Name: "default",
Subject: "test.func",
QueueGroup: "q",
Metadata: map[string]string{"basic": "schema"},
},
},
},
},
{
name: "INFO name",
subject: "$SRV.INFO.test_service",
expectedResponse: micro.Info{
Type: micro.InfoResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
ID: info.ID,
Metadata: map[string]string{},
},
Endpoints: []micro.EndpointInfo{
{
Name: "default",
Subject: "test.func",
QueueGroup: "q",
Metadata: map[string]string{"basic": "schema"},
},
},
},
},
{
name: "INFO ID",
subject: fmt.Sprintf("$SRV.INFO.test_service.%s", info.ID),
expectedResponse: micro.Info{
Type: micro.InfoResponseType,
ServiceIdentity: micro.ServiceIdentity{
Name: "test_service",
Version: "0.1.0",
ID: info.ID,
Metadata: map[string]string{},
},
Endpoints: []micro.EndpointInfo{
{
Name: "default",
Subject: "test.func",
QueueGroup: "q",
Metadata: map[string]string{"basic": "schema"},
},
},
},
},
{
name: "PING error",
subject: "$SRV.PING",
withError: true,
},
{
name: "INFO error",
subject: "$SRV.INFO",
withError: true,
},
{
name: "STATS error",
subject: "$SRV.STATS",
withError: true,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
if test.withError {
// use publish instead of request, so Respond will fail inside the handler
if err := nc.Publish(test.subject, nil); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
select {
case <-asyncErr:
return
case <-time.After(1 * time.Second):
t.Fatalf("Timeout waiting for async error")
}
return
}
resp, err := nc.Request(test.subject, nil, 1*time.Second)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
respMap := make(map[string]any)
if err := json.Unmarshal(resp.Data, &respMap); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
expectedResponseJSON, err := json.Marshal(test.expectedResponse)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
expectedRespMap := make(map[string]any)
if err := json.Unmarshal(expectedResponseJSON, &expectedRespMap); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if !reflect.DeepEqual(respMap, expectedRespMap) {
t.Fatalf("Invalid response; want: %+v; got: %+v", expectedRespMap, respMap)
}
})
}
}
func TestContextHandler(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
type key string
ctx = context.WithValue(ctx, key("key"), []byte("val"))
handler := func(ctx context.Context, req micro.Request) {
select {
case <-ctx.Done():
req.Error("400", "context canceled", nil)
default:
v := ctx.Value(key("key"))
req.Respond(v.([]byte))
}
}
config := micro.Config{
Name: "test_service",
Version: "0.1.0",
Endpoint: µ.EndpointConfig{
Subject: "test.func",
Handler: micro.ContextHandler(ctx, handler),
},
}
srv, err := micro.AddService(nc, config)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer srv.Stop()
resp, err := nc.Request("test.func", nil, 1*time.Second)
if err != nil {
t.Fatalf("Unexpected error: %s", err)
}
if string(resp.Data) != "val" {
t.Fatalf("Invalid response; want: %q; got: %q", "val", string(resp.Data))
}
cancel()
resp, err = nc.Request("test.func", nil, 1*time.Second)
if err != nil {
t.Fatalf("Unexpected error: %s", err)
}
if resp.Header.Get(micro.ErrorCodeHeader) != "400" {
t.Fatalf("Expected error response after canceling context; got: %q", string(resp.Data))
}
}
func TestAddEndpoint_Concurrency(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
ctx := context.Background()
handler := func(ctx context.Context, req micro.Request) {
req.RespondJSON(map[string]any{"hello": "world"})
}
config := micro.Config{
Name: "test_service",
Version: "0.1.0",
}
srv, err := micro.AddService(nc, config)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer srv.Stop()
res := make(chan error, 10)
wg := sync.WaitGroup{}
wg.Add(10)
// now add a few endpoints concurrently
// and make sure they are added successfully
// and there is no race
for i := 0; i < 10; i++ {
go func(i int) {
wg.Wait()
res <- srv.AddEndpoint(fmt.Sprintf("test%d", i), micro.ContextHandler(ctx, handler))
}(i)
// after all goroutines are started, release the lock
}
wg.Add(-10)
for i := 0; i < 10; i++ {
select {
case err := <-res:
if err != nil {
t.Fatalf("Unexpected error: %s", err)
}
case <-time.After(1 * time.Second):
t.Fatalf("Timeout waiting for endpoint to be added")
}
}
if len(srv.Info().Endpoints) != 10 {
t.Fatalf("Expected 11 endpoints, got: %d", len(srv.Info().Endpoints))
}
}
func TestServiceStats(t *testing.T) {
handler := func(r micro.Request) {
r.Respond([]byte("ok"))
}
tests := []struct {
name string
config micro.Config
expectedStats map[string]any
}{
{
name: "stats handler",
config: micro.Config{
Name: "test_service",
Version: "0.1.0",
},
},
{
name: "with stats handler",
config: micro.Config{
Name: "test_service",
Version: "0.1.0",
StatsHandler: func(e *micro.Endpoint) any {
return map[string]any{
"key": "val",
}
},
},
expectedStats: map[string]any{
"key": "val",
},
},
{
name: "with default endpoint",
config: micro.Config{
Name: "test_service",
Version: "0.1.0",
Endpoint: µ.EndpointConfig{
Subject: "test.func",
Handler: micro.HandlerFunc(handler),
Metadata: map[string]string{"test": "value"},
},
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
srv, err := micro.AddService(nc, test.config)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if test.config.Endpoint == nil {
opts := []micro.EndpointOpt{micro.WithEndpointSubject("test.func")}
if err := srv.AddEndpoint("func", micro.HandlerFunc(handler), opts...); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
defer srv.Stop()
for i := 0; i < 10; i++ {
if _, err := nc.Request("test.func", []byte("msg"), time.Second); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
// Malformed request, missing reply subjtct
// This should be reflected in errors
if err := nc.Publish("test.func", []byte("err")); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
time.Sleep(10 * time.Millisecond)
info := srv.Info()
resp, err := nc.Request(fmt.Sprintf("$SRV.STATS.test_service.%s", info.ID), nil, 1*time.Second)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
var stats micro.Stats
if err := json.Unmarshal(resp.Data, &stats); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if len(stats.Endpoints) != 1 {
t.Fatalf("Unexpected number of endpoints: want: %d; got: %d", 1, len(stats.Endpoints))
}
if stats.Name != info.Name {
t.Errorf("Unexpected service name; want: %s; got: %s", info.Name, stats.Name)
}
if stats.ID != info.ID {
t.Errorf("Unexpected service name; want: %s; got: %s", info.ID, stats.ID)
}
if test.config.Endpoint == nil && stats.Endpoints[0].Name != "func" {
t.Errorf("Invalid endpoint name; want: %s; got: %s", "func", stats.Endpoints[0].Name)
}
if test.config.Endpoint != nil && stats.Endpoints[0].Name != "default" {
t.Errorf("Invalid endpoint name; want: %s; got: %s", "default", stats.Endpoints[0].Name)
}
if stats.Endpoints[0].Subject != "test.func" {
t.Errorf("Invalid endpoint subject; want: %s; got: %s", "test.func", stats.Endpoints[0].Subject)
}
if stats.Endpoints[0].NumRequests != 11 {
t.Errorf("Unexpected num_requests; want: 11; got: %d", stats.Endpoints[0].NumRequests)
}
if stats.Endpoints[0].NumErrors != 1 {
t.Errorf("Unexpected num_errors; want: 1; got: %d", stats.Endpoints[0].NumErrors)
}
if stats.Endpoints[0].AverageProcessingTime == 0 {
t.Errorf("Expected non-empty AverageProcessingTime")
}
if stats.Endpoints[0].ProcessingTime == 0 {
t.Errorf("Expected non-empty ProcessingTime")
}
if stats.Started.IsZero() {
t.Errorf("Expected non-empty start time")
}
if stats.Type != micro.StatsResponseType {
t.Errorf("Invalid response type; want: %s; got: %s", micro.StatsResponseType, stats.Type)
}
if test.expectedStats != nil {
var data map[string]any
if err := json.Unmarshal(stats.Endpoints[0].Data, &data); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if !reflect.DeepEqual(data, test.expectedStats) {
t.Fatalf("Invalid data from stats handler; want: %v; got: %v", test.expectedStats, data)
}
}
})
}
}
func TestRequestRespond(t *testing.T) {
type x struct {
A string `json:"a"`
B int `json:"b"`
}
tests := []struct {
name string
respondData any
respondHeaders micro.Headers
errDescription string
errCode string
errData []byte
expectedMessage string
expectedCode string
expectedResponse []byte
withRespondError error
}{
{
name: "byte response",
respondData: []byte("OK"),
expectedResponse: []byte("OK"),
},
{
name: "byte response, with headers",
respondHeaders: micro.Headers{"key": []string{"value"}},
respondData: []byte("OK"),
expectedResponse: []byte("OK"),
},
{
name: "byte response, connection closed",
respondData: []byte("OK"),
withRespondError: micro.ErrRespond,
},
{
name: "struct response",
respondData: x{"abc", 5},
expectedResponse: []byte(`{"a":"abc","b":5}`),
},
{
name: "invalid response data",
respondData: func() {},
withRespondError: micro.ErrMarshalResponse,
},
{
name: "generic error",
errDescription: "oops",
errCode: "500",
errData: []byte("error!"),
expectedMessage: "oops",
expectedCode: "500",
},
{
name: "generic error, with headers",
respondHeaders: micro.Headers{"key": []string{"value"}},
errDescription: "oops",
errCode: "500",
errData: []byte("error!"),
expectedMessage: "oops",
expectedCode: "500",
},
{
name: "error without response payload",
errDescription: "oops",
errCode: "500",
expectedMessage: "oops",
expectedCode: "500",
},
{
name: "missing error code",
errDescription: "oops",
withRespondError: micro.ErrArgRequired,
},
{
name: "missing error description",
errCode: "500",
withRespondError: micro.ErrArgRequired,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
respData := test.respondData
respError := test.withRespondError
errCode := test.errCode
errDesc := test.errDescription
errData := test.errData
handler := func(req micro.Request) {
if errors.Is(test.withRespondError, micro.ErrRespond) {
nc.Close()
return
}
if val := req.Headers().Get("key"); val != "value" {
t.Fatalf("Expected headers in the request")
}
if !bytes.Equal(req.Data(), []byte("req")) {
t.Fatalf("Invalid request data; want: %q; got: %q", "req", req.Data())
}
if errCode == "" && errDesc == "" {
if resp, ok := respData.([]byte); ok {
err := req.Respond(resp, micro.WithHeaders(test.respondHeaders))
if respError != nil {
if !errors.Is(err, respError) {
t.Fatalf("Expected error: %v; got: %v", respError, err)
}
return
}
if err != nil {
t.Fatalf("Unexpected error when sending response: %v", err)
}
} else {
err := req.RespondJSON(respData, micro.WithHeaders(test.respondHeaders))
if respError != nil {
if !errors.Is(err, respError) {
t.Fatalf("Expected error: %v; got: %v", respError, err)
}
return
}
if err != nil {
t.Fatalf("Unexpected error when sending response: %v", err)
}
}
return
}
err := req.Error(errCode, errDesc, errData, micro.WithHeaders(test.respondHeaders))
if respError != nil {
if !errors.Is(err, respError) {
t.Fatalf("Expected error: %v; got: %v", respError, err)
}
return
}
if err != nil {
t.Fatalf("Unexpected error when sending response: %v", err)
}
}
svc, err := micro.AddService(nc, micro.Config{
Name: "CoolService",
Version: "0.1.0",
Description: "test service",
Endpoint: µ.EndpointConfig{
Subject: "test.func",
Handler: micro.HandlerFunc(handler),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer svc.Stop()
nfo := svc.Info()
if nfo.Metadata == nil {
t.Fatalf("Produced nil metadata")
}
resp, err := nc.RequestMsg(&nats.Msg{
Subject: "test.func",
Data: []byte("req"),
Header: nats.Header{"key": []string{"value"}},
}, 50*time.Millisecond)
if test.withRespondError != nil {
if err == nil {
t.Fatalf("Expected error when receiving response")
}
return
}
if err != nil {
t.Fatalf("request error: %v", err)
}
if test.errCode != "" {
description := resp.Header.Get("Nats-Service-Error")
if description != test.expectedMessage {
t.Fatalf("Invalid response message; want: %q; got: %q", test.expectedMessage, description)
}
expectedHeaders := micro.Headers{
"Nats-Service-Error-Code": []string{resp.Header.Get("Nats-Service-Error-Code")},
"Nats-Service-Error": []string{resp.Header.Get("Nats-Service-Error")},
}
for k, v := range test.respondHeaders {
expectedHeaders[k] = v
}
if !reflect.DeepEqual(expectedHeaders, micro.Headers(resp.Header)) {
t.Fatalf("Invalid response headers; want: %v; got: %v", test.respondHeaders, resp.Header)
}
return
}
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if !bytes.Equal(bytes.TrimSpace(resp.Data), bytes.TrimSpace(test.expectedResponse)) {
t.Fatalf("Invalid response; want: %s; got: %s", string(test.expectedResponse), string(resp.Data))
}
if !reflect.DeepEqual(test.respondHeaders, micro.Headers(resp.Header)) {
t.Fatalf("Invalid response headers; want: %v; got: %v", test.respondHeaders, resp.Header)
}
})
}
}
func RunServerOnPort(port int) *server.Server {
opts := natsserver.DefaultTestOptions
opts.Port = port
return RunServerWithOptions(&opts)
}
func RunServerWithOptions(opts *server.Options) *server.Server {
return natsserver.RunServer(opts)
}
func TestControlSubject(t *testing.T) {
tests := []struct {
name string
verb micro.Verb
srvName string
id string
expectedSubject string
withError error
}{
{
name: "PING ALL",
verb: micro.PingVerb,
expectedSubject: "$SRV.PING",
},
{
name: "PING name",
verb: micro.PingVerb,
srvName: "test",
expectedSubject: "$SRV.PING.test",
},
{
name: "PING id",
verb: micro.PingVerb,
srvName: "test",
id: "123",
expectedSubject: "$SRV.PING.test.123",
},
{
name: "invalid verb",
verb: micro.Verb(100),
withError: micro.ErrVerbNotSupported,
},
{
name: "name not provided",
verb: micro.PingVerb,
srvName: "",
id: "123",
withError: micro.ErrServiceNameRequired,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
res, err := micro.ControlSubject(test.verb, test.srvName, test.id)
if test.withError != nil {
if !errors.Is(err, test.withError) {
t.Fatalf("Expected error: %v; got: %v", test.withError, err)
}
return
}
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
if res != test.expectedSubject {
t.Errorf("Invalid subject; want: %q; got: %q", test.expectedSubject, res)
}
})
}
}
func TestCustomQueueGroup(t *testing.T) {
tests := []struct {
name string
endpointInit func(*testing.T, *nats.Conn) micro.Service
expectedQueueGroups map[string]string
}{
{
name: "default queue group",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
srv, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
Endpoint: µ.EndpointConfig{
Subject: "foo",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
err = srv.AddEndpoint("bar", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
return srv
},
expectedQueueGroups: map[string]string{
"default": "q",
"bar": "q",
},
},
{
name: "custom queue group on service config",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
srv, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
QueueGroup: "custom",
Endpoint: µ.EndpointConfig{
Subject: "foo",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on service directly, should have the same queue group
err = srv.AddEndpoint("bar", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add group with queue group from service config
g1 := srv.AddGroup("g1")
// add endpoint on group, should have queue group from service config
err = g1.AddEndpoint("baz", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
return srv
},
expectedQueueGroups: map[string]string{
"default": "custom",
"bar": "custom",
"baz": "custom",
},
},
{
name: "disable queue group on service config",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
srv, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
QueueGroupDisabled: true,
Endpoint: µ.EndpointConfig{
Subject: "foo",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on service directly, should have inherited disabled queue group
err = srv.AddEndpoint("bar", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add group with queue group from service config
g1 := srv.AddGroup("g1")
// add endpoint on group, should have queue group disabled
err = g1.AddEndpoint("baz", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on a service with queue group enabled
err = srv.AddEndpoint("qux", micro.HandlerFunc(func(r micro.Request) {}), micro.WithEndpointQueueGroup("q-qux"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on group and set custom queue group
err = g1.AddEndpoint("quux", micro.HandlerFunc(func(r micro.Request) {}), micro.WithEndpointQueueGroup("q-quux"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
return srv
},
expectedQueueGroups: map[string]string{
"default": "",
"bar": "",
"baz": "",
"qux": "q-qux",
"quux": "q-quux",
},
},
{
name: "overwriting queue groups",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
srv, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
QueueGroup: "q-config",
Endpoint: µ.EndpointConfig{
Subject: "foo",
QueueGroup: "q-default",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
g1 := srv.AddGroup("g1", micro.WithGroupQueueGroup("q-g1"))
// should have the same queue group as the parent group
g2 := g1.AddGroup("g2")
// overwrite parent group queue group
g3 := g2.AddGroup("g3", micro.WithGroupQueueGroup("q-g3"))
// disable queue group on group
g4 := g2.AddGroup("g4", micro.WithGroupQueueGroupDisabled())
// add endpoint on service directly, overwriting the queue group
err = srv.AddEndpoint("bar", micro.HandlerFunc(func(r micro.Request) {}), micro.WithEndpointQueueGroup("q-bar"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on group, should have queue group from g1
err = g2.AddEndpoint("baz", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on group, overwriting the queue group
err = g2.AddEndpoint("qux", micro.HandlerFunc(func(r micro.Request) {}), micro.WithEndpointQueueGroup("q-qux"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on group, should have queue group from g3
err = g3.AddEndpoint("quux", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
err = g4.AddEndpoint("foo-disabled", micro.HandlerFunc(func(r micro.Request) {}))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
return srv
},
expectedQueueGroups: map[string]string{
"default": "q-default",
"bar": "q-bar",
"baz": "q-g1",
"qux": "q-qux",
"quux": "q-g3",
"foo-disabled": "",
},
},
{
name: "empty queue group in option, inherit from parent",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
srv, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
QueueGroup: "q-config",
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
// add endpoint on service directly, overwriting the queue group
err = srv.AddEndpoint("bar", micro.HandlerFunc(func(r micro.Request) {}), micro.WithEndpointQueueGroup(""))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
return srv
},
expectedQueueGroups: map[string]string{
"bar": "q-config",
},
},
{
name: "invalid queue group on service config",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
_, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
QueueGroup: ">.abc",
Endpoint: µ.EndpointConfig{
Subject: "foo",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if !errors.Is(err, micro.ErrConfigValidation) {
t.Fatalf("Expected error: %v; got: %v", micro.ErrConfigValidation, err)
}
return nil
},
},
{
name: "invalid queue group on endpoint",
endpointInit: func(t *testing.T, nc *nats.Conn) micro.Service {
_, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
Endpoint: µ.EndpointConfig{
Subject: "foo",
QueueGroup: ">.abc",
Handler: micro.HandlerFunc(func(r micro.Request) {}),
},
})
if !errors.Is(err, micro.ErrConfigValidation) {
t.Fatalf("Expected error: %v; got: %v", micro.ErrConfigValidation, err)
}
return nil
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
srv := test.endpointInit(t, nc)
if srv == nil {
return
}
defer srv.Stop()
info := srv.Info()
endpoints := make(map[string]micro.EndpointInfo)
for _, e := range info.Endpoints {
endpoints[e.Name] = e
}
if len(endpoints) != len(test.expectedQueueGroups) {
t.Fatalf("Expected %d endpoints; got: %d", len(test.expectedQueueGroups), len(endpoints))
}
for name, expectedGroup := range test.expectedQueueGroups {
if endpoints[name].QueueGroup != expectedGroup {
t.Fatalf("Invalid queue group for endpoint %q; want: %q; got: %q", name, expectedGroup, endpoints[name].QueueGroup)
}
}
stats := srv.Stats()
// make sure the same queue groups are on stats
endpointStats := make(map[string]*micro.EndpointStats)
for _, e := range stats.Endpoints {
endpointStats[e.Name] = e
}
if len(endpointStats) != len(test.expectedQueueGroups) {
t.Fatalf("Expected %d endpoints; got: %d", len(test.expectedQueueGroups), len(endpointStats))
}
for name, expectedGroup := range test.expectedQueueGroups {
if endpointStats[name].QueueGroup != expectedGroup {
t.Fatalf("Invalid queue group for endpoint %q; want: %q; got: %q", name, expectedGroup, endpointStats[name].QueueGroup)
}
}
})
}
}
func TestCustomQueueGroupMultipleResponses(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
for i := 0; i < 5; i++ {
f := func(i int) func(r micro.Request) {
return func(r micro.Request) {
time.Sleep(10 * time.Millisecond)
r.Respond([]byte(fmt.Sprintf("%d", i)))
}
}
service, err := micro.AddService(nc, micro.Config{
Name: "test_service",
Version: "0.0.1",
QueueGroup: fmt.Sprintf("q-%d", i),
Endpoint: µ.EndpointConfig{
Subject: "foo",
Handler: micro.HandlerFunc(f(i)),
},
})
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer service.Stop()
}
err = nc.PublishRequest("foo", "rply", []byte("req"))
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
sub, err := nc.SubscribeSync("rply")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
expectedResponses := map[string]bool{
"0": false,
"1": false,
"2": false,
"3": false,
"4": false,
}
defer sub.Unsubscribe()
for i := 0; i < 5; i++ {
msg, err := sub.NextMsg(1 * time.Second)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
expectedResponses[string(msg.Data)] = true
}
msg, err := sub.NextMsg(100 * time.Millisecond)
if err == nil {
t.Fatalf("Unexpected message: %v", string(msg.Data))
}
for k, v := range expectedResponses {
if !v {
t.Fatalf("Did not receive response from service %s", k)
}
}
}
func TestDisableQueueGroup(t *testing.T) {
s := RunServerOnPort(-1)
defer s.Shutdown()
nc, err := nats.Connect(s.ClientURL())
if err != nil {
t.Fatalf("Expected to connect to server, got %v", err)
}
defer nc.Close()
wg := sync.WaitGroup{}
// Create 5 service responders.
config := micro.Config{
Name: "CoolAddService",
Version: "0.1.0",
Description: "Add things together",
Metadata: map[string]string{"basic": "metadata"},
Endpoint: µ.EndpointConfig{
Subject: "svc.add",
Handler: micro.HandlerFunc(func(r micro.Request) {
r.Respond(nil)
wg.Done()
}),
},
QueueGroupDisabled: true,
}
for range 10 {
srv, err := micro.AddService(nc, config)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer srv.Stop()
}
wg.Add(10)
// Send a request to the service.
if err = nc.PublishRequest("svc.add", "rply", []byte("req")); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
wg.Wait()
}
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