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// Copyright 2018 Google Inc. All Rights Reserved.
//
// 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 pubsub
import (
"log"
"sync/atomic"
"testing"
"time"
"golang.org/x/net/context"
"cloud.google.com/go/pubsub/pstest"
"google.golang.org/api/option"
"google.golang.org/grpc"
)
// Using the fake PubSub server in the pstest package, verify that streaming
// pull resumes if the server stream times out.
func TestStreamTimeout(t *testing.T) {
log.SetFlags(log.Lmicroseconds)
ctx := context.Background()
srv := pstest.NewServer()
srv.SetStreamTimeout(2 * time.Second)
conn, err := grpc.Dial(srv.Addr, grpc.WithInsecure())
if err != nil {
t.Fatal(err)
}
client, err := NewClient(ctx, "P", option.WithGRPCConn(conn))
if err != nil {
t.Fatal(err)
}
defer client.Close()
topic, err := client.CreateTopic(ctx, "T")
if err != nil {
t.Fatal(err)
}
sub, err := client.CreateSubscription(ctx, "sub", SubscriptionConfig{Topic: topic, AckDeadline: 10 * time.Second})
if err != nil {
t.Fatal(err)
}
const nPublish = 8
rctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
errc := make(chan error)
var nSeen int64
go func() {
errc <- sub.Receive(rctx, func(ctx context.Context, m *Message) {
m.Ack()
n := atomic.AddInt64(&nSeen, 1)
if n >= nPublish {
cancel()
}
})
}()
for i := 0; i < nPublish; i++ {
pr := topic.Publish(ctx, &Message{Data: []byte("msg")})
_, err := pr.Get(ctx)
if err != nil {
t.Fatal(err)
}
time.Sleep(250 * time.Millisecond)
}
err = <-errc
if err := sub.Delete(ctx); err != nil {
t.Fatal(err)
}
n := atomic.LoadInt64(&nSeen)
t.Logf("Receive returned %v after seeing %d messages\n", err, n)
if n < nPublish {
t.Errorf("got %d messages, want %d", n, nPublish)
}
}
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