pstest_test.go

Documentation: cloud.google.com/go/pubsub

     1  // Copyright 2018 Google LLC
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package pubsub_test
    16  
    17  import (
    18  	"context"
    19  	"strconv"
    20  	"sync"
    21  	"testing"
    22  
    23  	"cloud.google.com/go/internal/testutil"
    24  	"cloud.google.com/go/pubsub"
    25  	"cloud.google.com/go/pubsub/pstest"
    26  	"google.golang.org/api/option"
    27  	"google.golang.org/grpc"
    28  )
    29  
    30  // withGRPCHeadersAssertionAlt is named differently than
    31  // withGRPCHeadersAssertion in integration_test.go, because integration_test.go
    32  // doesn't perform an external test i.e. its package name is "pubsub" while
    33  // this one's is "pubsub_test", and when using Go Modules, without this rename
    34  // go test won't find the function "withGRPCHeadersAssertion".
    35  func withGRPCHeadersAssertionAlt(t *testing.T, opts ...option.ClientOption) []option.ClientOption {
    36  	grpcHeadersEnforcer := &testutil.HeadersEnforcer{
    37  		OnFailure: t.Fatalf,
    38  		Checkers: []*testutil.HeaderChecker{
    39  			testutil.XGoogClientHeaderChecker,
    40  		},
    41  	}
    42  	return append(grpcHeadersEnforcer.CallOptions(), opts...)
    43  }
    44  
    45  func TestPSTest(t *testing.T) {
    46  	t.Parallel()
    47  	ctx := context.Background()
    48  	srv := pstest.NewServer()
    49  	defer srv.Close()
    50  
    51  	conn, err := grpc.Dial(srv.Addr, grpc.WithInsecure())
    52  	if err != nil {
    53  		panic(err)
    54  	}
    55  	defer conn.Close()
    56  
    57  	opts := withGRPCHeadersAssertionAlt(t, option.WithGRPCConn(conn))
    58  	client, err := pubsub.NewClient(ctx, "some-project", opts...)
    59  	if err != nil {
    60  		panic(err)
    61  	}
    62  	defer client.Close()
    63  
    64  	topic, err := client.CreateTopic(ctx, "test-topic")
    65  	if err != nil {
    66  		panic(err)
    67  	}
    68  
    69  	sub, err := client.CreateSubscription(ctx, "sub-name", pubsub.SubscriptionConfig{Topic: topic})
    70  	if err != nil {
    71  		panic(err)
    72  	}
    73  
    74  	go func() {
    75  		for i := 0; i < 10; i++ {
    76  			srv.Publish("projects/some-project/topics/test-topic", []byte(strconv.Itoa(i)), nil)
    77  		}
    78  	}()
    79  
    80  	ctx, cancel := context.WithCancel(ctx)
    81  	var mu sync.Mutex
    82  	count := 0
    83  	err = sub.Receive(ctx, func(ctx context.Context, m *pubsub.Message) {
    84  		mu.Lock()
    85  		count++
    86  		if count >= 10 {
    87  			cancel()
    88  		}
    89  		mu.Unlock()
    90  		m.Ack()
    91  	})
    92  	if err != nil {
    93  		panic(err)
    94  	}
    95  }
    96
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