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nginx-sso/vendor/cloud.google.com/go/pubsub/pstest/fake_test.go
Knut Ahlers 9b3c895c04
Update dependencies
Signed-off-by: Knut Ahlers <knut@ahlers.me>
2019-04-22 06:44:07 +02:00

714 lines
21 KiB
Go

// Copyright 2017 Google LLC
//
// 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 pstest
import (
"context"
"fmt"
"io"
"sync"
"testing"
"time"
"cloud.google.com/go/internal/testutil"
"github.com/golang/protobuf/ptypes"
pb "google.golang.org/genproto/googleapis/pubsub/v1"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func TestTopics(t *testing.T) {
pclient, _, server, cleanup := newFake(context.TODO(), t)
defer cleanup()
ctx := context.Background()
var topics []*pb.Topic
for i := 1; i < 3; i++ {
topics = append(topics, mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{
Name: fmt.Sprintf("projects/P/topics/T%d", i),
Labels: map[string]string{"num": fmt.Sprintf("%d", i)},
}))
}
if got, want := len(server.GServer.topics), len(topics); got != want {
t.Fatalf("got %d topics, want %d", got, want)
}
for _, top := range topics {
got, err := pclient.GetTopic(ctx, &pb.GetTopicRequest{Topic: top.Name})
if err != nil {
t.Fatal(err)
}
if !testutil.Equal(got, top) {
t.Errorf("\ngot %+v\nwant %+v", got, top)
}
}
res, err := pclient.ListTopics(ctx, &pb.ListTopicsRequest{Project: "projects/P"})
if err != nil {
t.Fatal(err)
}
if got, want := res.Topics, topics; !testutil.Equal(got, want) {
t.Errorf("\ngot %+v\nwant %+v", got, want)
}
for _, top := range topics {
if _, err := pclient.DeleteTopic(ctx, &pb.DeleteTopicRequest{Topic: top.Name}); err != nil {
t.Fatal(err)
}
}
if got, want := len(server.GServer.topics), 0; got != want {
t.Fatalf("got %d topics, want %d", got, want)
}
}
func TestSubscriptions(t *testing.T) {
pclient, sclient, server, cleanup := newFake(context.TODO(), t)
defer cleanup()
ctx := context.Background()
topic := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
var subs []*pb.Subscription
for i := 0; i < 3; i++ {
subs = append(subs, mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: fmt.Sprintf("projects/P/subscriptions/S%d", i),
Topic: topic.Name,
AckDeadlineSeconds: int32(10 * (i + 1)),
}))
}
if got, want := len(server.GServer.subs), len(subs); got != want {
t.Fatalf("got %d subscriptions, want %d", got, want)
}
for _, s := range subs {
got, err := sclient.GetSubscription(ctx, &pb.GetSubscriptionRequest{Subscription: s.Name})
if err != nil {
t.Fatal(err)
}
if !testutil.Equal(got, s) {
t.Errorf("\ngot %+v\nwant %+v", got, s)
}
}
res, err := sclient.ListSubscriptions(ctx, &pb.ListSubscriptionsRequest{Project: "projects/P"})
if err != nil {
t.Fatal(err)
}
if got, want := res.Subscriptions, subs; !testutil.Equal(got, want) {
t.Errorf("\ngot %+v\nwant %+v", got, want)
}
res2, err := pclient.ListTopicSubscriptions(ctx, &pb.ListTopicSubscriptionsRequest{Topic: topic.Name})
if err != nil {
t.Fatal(err)
}
if got, want := len(res2.Subscriptions), len(subs); got != want {
t.Fatalf("got %d subs, want %d", got, want)
}
for i, got := range res2.Subscriptions {
want := subs[i].Name
if !testutil.Equal(got, want) {
t.Errorf("\ngot %+v\nwant %+v", got, want)
}
}
for _, s := range subs {
if _, err := sclient.DeleteSubscription(ctx, &pb.DeleteSubscriptionRequest{Subscription: s.Name}); err != nil {
t.Fatal(err)
}
}
if got, want := len(server.GServer.subs), 0; got != want {
t.Fatalf("got %d subscriptions, want %d", got, want)
}
}
func TestSubscriptionErrors(t *testing.T) {
_, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
ctx := context.Background()
checkCode := func(err error, want codes.Code) {
t.Helper()
if status.Code(err) != want {
t.Errorf("got %v, want code %s", err, want)
}
}
_, err := sclient.GetSubscription(ctx, &pb.GetSubscriptionRequest{})
checkCode(err, codes.InvalidArgument)
_, err = sclient.GetSubscription(ctx, &pb.GetSubscriptionRequest{Subscription: "s"})
checkCode(err, codes.NotFound)
_, err = sclient.UpdateSubscription(ctx, &pb.UpdateSubscriptionRequest{})
checkCode(err, codes.InvalidArgument)
_, err = sclient.UpdateSubscription(ctx, &pb.UpdateSubscriptionRequest{Subscription: &pb.Subscription{}})
checkCode(err, codes.InvalidArgument)
_, err = sclient.UpdateSubscription(ctx, &pb.UpdateSubscriptionRequest{Subscription: &pb.Subscription{Name: "s"}})
checkCode(err, codes.NotFound)
_, err = sclient.DeleteSubscription(ctx, &pb.DeleteSubscriptionRequest{})
checkCode(err, codes.InvalidArgument)
_, err = sclient.DeleteSubscription(ctx, &pb.DeleteSubscriptionRequest{Subscription: "s"})
checkCode(err, codes.NotFound)
_, err = sclient.Acknowledge(ctx, &pb.AcknowledgeRequest{})
checkCode(err, codes.InvalidArgument)
_, err = sclient.Acknowledge(ctx, &pb.AcknowledgeRequest{Subscription: "s"})
checkCode(err, codes.NotFound)
_, err = sclient.ModifyAckDeadline(ctx, &pb.ModifyAckDeadlineRequest{})
checkCode(err, codes.InvalidArgument)
_, err = sclient.ModifyAckDeadline(ctx, &pb.ModifyAckDeadlineRequest{Subscription: "s"})
checkCode(err, codes.NotFound)
_, err = sclient.Pull(ctx, &pb.PullRequest{})
checkCode(err, codes.InvalidArgument)
_, err = sclient.Pull(ctx, &pb.PullRequest{Subscription: "s"})
checkCode(err, codes.NotFound)
_, err = sclient.Seek(ctx, &pb.SeekRequest{})
checkCode(err, codes.InvalidArgument)
srt := &pb.SeekRequest_Time{Time: ptypes.TimestampNow()}
_, err = sclient.Seek(ctx, &pb.SeekRequest{Target: srt})
checkCode(err, codes.InvalidArgument)
_, err = sclient.Seek(ctx, &pb.SeekRequest{Target: srt, Subscription: "s"})
checkCode(err, codes.NotFound)
}
func TestPublish(t *testing.T) {
s := NewServer()
defer s.Close()
var ids []string
for i := 0; i < 3; i++ {
ids = append(ids, s.Publish("projects/p/topics/t", []byte("hello"), nil))
}
s.Wait()
ms := s.Messages()
if got, want := len(ms), len(ids); got != want {
t.Errorf("got %d messages, want %d", got, want)
}
for i, id := range ids {
if got, want := ms[i].ID, id; got != want {
t.Errorf("got %s, want %s", got, want)
}
}
m := s.Message(ids[1])
if m == nil {
t.Error("got nil, want a message")
}
}
// Note: this sets the fake's "now" time, so it is sensitive to concurrent changes to "now".
func publish(t *testing.T, pclient pb.PublisherClient, topic *pb.Topic, messages []*pb.PubsubMessage) map[string]*pb.PubsubMessage {
pubTime := time.Now()
now.Store(func() time.Time { return pubTime })
defer func() { now.Store(time.Now) }()
res, err := pclient.Publish(context.Background(), &pb.PublishRequest{
Topic: topic.Name,
Messages: messages,
})
if err != nil {
t.Fatal(err)
}
tsPubTime, err := ptypes.TimestampProto(pubTime)
if err != nil {
t.Fatal(err)
}
want := map[string]*pb.PubsubMessage{}
for i, id := range res.MessageIds {
want[id] = &pb.PubsubMessage{
Data: messages[i].Data,
Attributes: messages[i].Attributes,
MessageId: id,
PublishTime: tsPubTime,
}
}
return want
}
func TestPull(t *testing.T) {
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
want := publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
got := pubsubMessages(pullN(context.TODO(), t, len(want), sclient, sub))
if diff := testutil.Diff(got, want); diff != "" {
t.Error(diff)
}
res, err := sclient.Pull(context.Background(), &pb.PullRequest{Subscription: sub.Name})
if err != nil {
t.Fatal(err)
}
if len(res.ReceivedMessages) != 0 {
t.Errorf("got %d messages, want zero", len(res.ReceivedMessages))
}
}
func TestStreamingPull(t *testing.T) {
// A simple test of streaming pull.
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
want := publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
got := pubsubMessages(streamingPullN(context.TODO(), t, len(want), sclient, sub))
if diff := testutil.Diff(got, want); diff != "" {
t.Error(diff)
}
}
// This test acks each message as it arrives and makes sure we don't see dups.
func TestStreamingPullAck(t *testing.T) {
minAckDeadlineSecs = 1
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 1,
})
_ = publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
got := map[string]bool{}
ctx, cancel := context.WithCancel(context.Background())
spc := mustStartStreamingPull(ctx, t, sclient, sub)
time.AfterFunc(time.Duration(2*minAckDeadlineSecs)*time.Second, cancel)
for i := 0; i < 4; i++ {
res, err := spc.Recv()
if err == io.EOF {
break
}
if err != nil {
if status.Code(err) == codes.Canceled {
break
}
t.Fatal(err)
}
if i == 3 {
t.Fatal("expected to only see 3 messages, got 4")
}
req := &pb.StreamingPullRequest{}
for _, m := range res.ReceivedMessages {
if got[m.Message.MessageId] {
t.Fatal("duplicate message")
}
got[m.Message.MessageId] = true
req.AckIds = append(req.AckIds, m.AckId)
}
if err := spc.Send(req); err != nil {
t.Fatal(err)
}
}
}
func TestAcknowledge(t *testing.T) {
ctx := context.Background()
pclient, sclient, srv, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
msgs := streamingPullN(context.TODO(), t, 3, sclient, sub)
var ackIDs []string
for _, m := range msgs {
ackIDs = append(ackIDs, m.AckId)
}
if _, err := sclient.Acknowledge(ctx, &pb.AcknowledgeRequest{
Subscription: sub.Name,
AckIds: ackIDs,
}); err != nil {
t.Fatal(err)
}
smsgs := srv.Messages()
if got, want := len(smsgs), 3; got != want {
t.Fatalf("got %d messages, want %d", got, want)
}
for _, sm := range smsgs {
if sm.Acks != 1 {
t.Errorf("message %s: got %d acks, want 1", sm.ID, sm.Acks)
}
}
}
func TestModAck(t *testing.T) {
ctx := context.Background()
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
msgs := streamingPullN(context.TODO(), t, 3, sclient, sub)
var ackIDs []string
for _, m := range msgs {
ackIDs = append(ackIDs, m.AckId)
}
if _, err := sclient.ModifyAckDeadline(ctx, &pb.ModifyAckDeadlineRequest{
Subscription: sub.Name,
AckIds: ackIDs,
AckDeadlineSeconds: 0,
}); err != nil {
t.Fatal(err)
}
// Having nacked all three messages, we should see them again.
msgs = streamingPullN(context.TODO(), t, 3, sclient, sub)
if got, want := len(msgs), 3; got != want {
t.Errorf("got %d messages, want %d", got, want)
}
}
func TestAckDeadline(t *testing.T) {
// Messages should be resent after they expire.
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
minAckDeadlineSecs = 2
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: minAckDeadlineSecs,
})
_ = publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
got := map[string]int{}
spc := mustStartStreamingPull(context.TODO(), t, sclient, sub)
// In 5 seconds the ack deadline will expire twice, so we should see each message
// exactly three times.
time.AfterFunc(5*time.Second, func() {
if err := spc.CloseSend(); err != nil {
t.Errorf("CloseSend: %v", err)
}
})
for {
res, err := spc.Recv()
if err == io.EOF {
break
}
if err != nil {
t.Fatal(err)
}
for _, m := range res.ReceivedMessages {
got[m.Message.MessageId]++
}
}
for id, n := range got {
if n != 3 {
t.Errorf("message %s: saw %d times, want 3", id, n)
}
}
}
func TestMultiSubs(t *testing.T) {
// Each subscription gets every message.
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub1 := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S1",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
sub2 := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S2",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
want := publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
{Data: []byte("d3")},
})
got1 := pubsubMessages(streamingPullN(context.TODO(), t, len(want), sclient, sub1))
got2 := pubsubMessages(streamingPullN(context.TODO(), t, len(want), sclient, sub2))
if diff := testutil.Diff(got1, want); diff != "" {
t.Error(diff)
}
if diff := testutil.Diff(got2, want); diff != "" {
t.Error(diff)
}
}
// Messages are handed out to all streams of a subscription in a best-effort
// round-robin behavior. The fake server prefers to fail-fast onto another
// stream when one stream is already busy, though, so we're unable to test
// strict round robin behavior.
func TestMultiStreams(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
pclient, sclient, _, cleanup := newFake(ctx, t)
defer cleanup()
top := mustCreateTopic(ctx, t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(ctx, t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
st1 := mustStartStreamingPull(ctx, t, sclient, sub)
defer st1.CloseSend()
st1Received := make(chan struct{})
go func() {
_, err := st1.Recv()
if err != nil {
t.Error(err)
}
close(st1Received)
}()
st2 := mustStartStreamingPull(ctx, t, sclient, sub)
defer st2.CloseSend()
st2Received := make(chan struct{})
go func() {
_, err := st2.Recv()
if err != nil {
t.Error(err)
}
close(st2Received)
}()
publish(t, pclient, top, []*pb.PubsubMessage{
{Data: []byte("d1")},
{Data: []byte("d2")},
})
timeout := time.After(5 * time.Second)
select {
case <-timeout:
t.Fatal("timed out waiting for stream 1 to receive any message")
case <-st1Received:
}
select {
case <-timeout:
t.Fatal("timed out waiting for stream 1 to receive any message")
case <-st2Received:
}
}
func TestStreamingPullTimeout(t *testing.T) {
pclient, sclient, srv, cleanup := newFake(context.TODO(), t)
defer cleanup()
timeout := 200 * time.Millisecond
srv.SetStreamTimeout(timeout)
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
stream := mustStartStreamingPull(context.TODO(), t, sclient, sub)
time.Sleep(2 * timeout)
_, err := stream.Recv()
if err != io.EOF {
t.Errorf("got %v, want io.EOF", err)
}
}
func TestSeek(t *testing.T) {
pclient, sclient, _, cleanup := newFake(context.TODO(), t)
defer cleanup()
top := mustCreateTopic(context.TODO(), t, pclient, &pb.Topic{Name: "projects/P/topics/T"})
sub := mustCreateSubscription(context.TODO(), t, sclient, &pb.Subscription{
Name: "projects/P/subscriptions/S",
Topic: top.Name,
AckDeadlineSeconds: 10,
})
ts := ptypes.TimestampNow()
_, err := sclient.Seek(context.Background(), &pb.SeekRequest{
Subscription: sub.Name,
Target: &pb.SeekRequest_Time{Time: ts},
})
if err != nil {
t.Errorf("Seeking: %v", err)
}
}
func TestTryDeliverMessage(t *testing.T) {
for _, test := range []struct {
availStreamIdx int
expectedOutIdx int
}{
{availStreamIdx: 0, expectedOutIdx: 0},
// Stream 1 will always be marked for deletion.
{availStreamIdx: 2, expectedOutIdx: 1}, // s0, s1 (deleted), s2, s3 becomes s0, s2, s3. So we expect outIdx=1.
{availStreamIdx: 3, expectedOutIdx: 2}, // s0, s1 (deleted), s2, s3 becomes s0, s2, s3. So we expect outIdx=2.
} {
top := newTopic(&pb.Topic{Name: "some-topic"})
sub := newSubscription(top, &sync.Mutex{}, &pb.Subscription{Name: "some-sub", Topic: "some-topic"})
done := make(chan struct{}, 1)
done <- struct{}{}
sub.streams = []*stream{{}, {done: done}, {}, {}}
msgc := make(chan *pb.ReceivedMessage, 1)
sub.streams[test.availStreamIdx].msgc = msgc
var d int
idx, ok := sub.tryDeliverMessage(&message{deliveries: &d}, 0, time.Now())
if !ok {
t.Fatalf("[avail=%d]: expected msg to be put on stream %d's channel, but it was not", test.availStreamIdx, test.expectedOutIdx)
}
if idx != test.expectedOutIdx {
t.Fatalf("[avail=%d]: expected msg to be put on stream %d, but it was put on %d", test.availStreamIdx, test.expectedOutIdx, idx)
}
select {
case <-msgc:
default:
t.Fatalf("[avail=%d]: expected msg to be put on stream %d's channel, but it was not", test.availStreamIdx, idx)
}
}
}
func mustStartStreamingPull(ctx context.Context, t *testing.T, sc pb.SubscriberClient, sub *pb.Subscription) pb.Subscriber_StreamingPullClient {
spc, err := sc.StreamingPull(ctx)
if err != nil {
t.Fatal(err)
}
if err := spc.Send(&pb.StreamingPullRequest{Subscription: sub.Name}); err != nil {
t.Fatal(err)
}
return spc
}
func pullN(ctx context.Context, t *testing.T, n int, sc pb.SubscriberClient, sub *pb.Subscription) map[string]*pb.ReceivedMessage {
got := map[string]*pb.ReceivedMessage{}
for i := 0; len(got) < n; i++ {
res, err := sc.Pull(ctx, &pb.PullRequest{Subscription: sub.Name, MaxMessages: int32(n - len(got))})
if err != nil {
t.Fatal(err)
}
for _, m := range res.ReceivedMessages {
got[m.Message.MessageId] = m
}
}
return got
}
func streamingPullN(ctx context.Context, t *testing.T, n int, sc pb.SubscriberClient, sub *pb.Subscription) map[string]*pb.ReceivedMessage {
spc := mustStartStreamingPull(ctx, t, sc, sub)
got := map[string]*pb.ReceivedMessage{}
for i := 0; i < n; i++ {
res, err := spc.Recv()
if err != nil {
t.Fatal(err)
}
for _, m := range res.ReceivedMessages {
got[m.Message.MessageId] = m
}
}
if err := spc.CloseSend(); err != nil {
t.Fatal(err)
}
res, err := spc.Recv()
if err != io.EOF {
t.Fatalf("Recv returned <%v> instead of EOF; res = %v", err, res)
}
return got
}
func pubsubMessages(rms map[string]*pb.ReceivedMessage) map[string]*pb.PubsubMessage {
ms := map[string]*pb.PubsubMessage{}
for k, rm := range rms {
ms[k] = rm.Message
}
return ms
}
func mustCreateTopic(ctx context.Context, t *testing.T, pc pb.PublisherClient, topic *pb.Topic) *pb.Topic {
top, err := pc.CreateTopic(ctx, topic)
if err != nil {
t.Fatal(err)
}
return top
}
func mustCreateSubscription(ctx context.Context, t *testing.T, sc pb.SubscriberClient, sub *pb.Subscription) *pb.Subscription {
sub, err := sc.CreateSubscription(ctx, sub)
if err != nil {
t.Fatal(err)
}
return sub
}
// newFake creates a new fake server along with a publisher and subscriber
// client. Its final return is a cleanup function.
//
// Note: be sure to call cleanup!
func newFake(ctx context.Context, t *testing.T) (pb.PublisherClient, pb.SubscriberClient, *Server, func()) {
srv := NewServer()
conn, err := grpc.DialContext(ctx, srv.Addr, grpc.WithInsecure())
if err != nil {
t.Fatal(err)
}
return pb.NewPublisherClient(conn), pb.NewSubscriberClient(conn), srv, func() {
srv.Close()
conn.Close()
}
}