func TestAdminClient(t *testing.T) {
	ctx := context.Background()
	projectID := testutil.ProjID()
	newBucket := projectID + "copy"

	client, err := NewAdminClient(ctx, projectID, cloud.WithTokenSource(testutil.TokenSource(ctx, ScopeFullControl)))
	if err != nil {
		t.Fatalf("Could not create client: %v", err)
	}
	defer client.Close()

	if err := client.CreateBucket(ctx, newBucket, nil); err != nil {
		t.Errorf("CreateBucket(%v, %v) failed %v", newBucket, nil, err)
	}
	if err := client.DeleteBucket(ctx, newBucket); err != nil {
		t.Errorf("DeleteBucket(%v) failed %v", newBucket, err)
		t.Logf("TODO: Warning this test left a new bucket in the cloud project, it must be deleted manually")
	}
	attrs := BucketAttrs{
		DefaultObjectACL: []ACLRule{{Entity: "domain-google.com", Role: RoleReader}},
	}
	if err := client.CreateBucket(ctx, newBucket, &attrs); err != nil {
		t.Errorf("CreateBucket(%v, %v) failed %v", newBucket, attrs, err)
	}
	if err := client.DeleteBucket(ctx, newBucket); err != nil {
		t.Errorf("DeleteBucket(%v) failed %v", newBucket, err)
		t.Logf("TODO: Warning this test left a new bucket in the cloud project, it must be deleted manually")
	}
}

func TestIntegrationPingBadProject(t *testing.T) {
	if testing.Short() {
		t.Skip("Integration tests skipped in short mode")
	}

	ctx := context.Background()
	ts := testutil.TokenSource(ctx, Scope)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}

	for _, projID := range []string{
		testutil.ProjID() + "-BAD", // nonexistent project
		"amazing-height-519",       // exists, but wrong creds
	} {
		c, err := NewClient(ctx, projID, "logging-integration-test", cloud.WithTokenSource(ts))
		if err != nil {
			t.Fatalf("project %s: error creating client: %v", projID, err)
		}
		if err := c.Ping(); err == nil {
			t.Errorf("project %s: want error pinging logging api, got nil", projID)
		}
		// Ping twice, just to make sure the deduping doesn't mess with the result.
		if err := c.Ping(); err == nil {
			t.Errorf("project %s: want error pinging logging api, got nil", projID)
		}
	}
}

func newClient(ctx context.Context) *Client {
	ts := testutil.TokenSource(ctx, ScopeDatastore, ScopeUserEmail)
	client, err := NewClient(ctx, testutil.ProjID(), cloud.WithTokenSource(ts))
	if err != nil {
		log.Fatal(err)
	}
	return client
}

func newClient(ctx context.Context, t *testing.T) *Client {
	ts := testutil.TokenSource(ctx, ScopeDatastore)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}
	client, err := NewClient(ctx, testutil.ProjID(), cloud.WithTokenSource(ts))
	if err != nil {
		t.Fatalf("NewClient: %v", err)
	}
	return client
}

// config is like testConfig, but it doesn't need a *testing.T.
func config(ctx context.Context) (*Client, string) {
	ts := testutil.TokenSource(ctx, ScopeFullControl)
	if ts == nil {
		return nil, ""
	}
	p := testutil.ProjID()
	if p == "" {
		log.Fatal("The project ID must be set. See CONTRIBUTING.md for details")
	}
	client, err := NewClient(ctx, cloud.WithTokenSource(ts))
	if err != nil {
		log.Fatalf("NewClient: %v", err)
	}
	return client, p
}

// testConfig returns the Client used to access GCS and the default bucket
// name to use.
func testConfig(ctx context.Context, t *testing.T) (*Client, string) {
	ts := cloud.WithTokenSource(testutil.TokenSource(ctx, ScopeFullControl))
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}
	p := testutil.ProjID()
	if p == "" {
		log.Fatal("The project ID must be set. See CONTRIBUTING.md for details")
	}
	client, err := NewClient(ctx, ts)
	if err != nil {
		t.Fatalf("NewClient: %v", err)
	}
	return client, p
}

func TestIntegration(t *testing.T) {
	if testing.Short() {
		t.Skip("Integration tests skipped in short mode")
	}

	ctx := context.Background()
	ts := testutil.TokenSource(ctx, Scope)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}

	projID := testutil.ProjID()

	c, err := NewClient(ctx, projID, "logging-integration-test", cloud.WithTokenSource(ts))
	if err != nil {
		t.Fatalf("error creating client: %v", err)
	}

	if err := c.Ping(); err != nil {
		t.Fatalf("error pinging logging api: %v", err)
	}
	// Ping twice, to verify that deduping doesn't change the result.
	if err := c.Ping(); err != nil {
		t.Fatalf("error pinging logging api: %v", err)
	}

	if err := c.LogSync(Entry{Payload: customJSONObject{}}); err != nil {
		t.Fatalf("error writing log: %v", err)
	}

	if err := c.Log(Entry{Payload: customJSONObject{}}); err != nil {
		t.Fatalf("error writing log: %v", err)
	}

	if _, err := c.Writer(Default).Write([]byte("test log with io.Writer")); err != nil {
		t.Fatalf("error writing log using io.Writer: %v", err)
	}

	c.Logger(Default).Println("test log with log.Logger")

	if err := c.Flush(); err != nil {
		t.Fatalf("error flushing logs: %v", err)
	}
}

func TestAdminClient(t *testing.T) {
	if testing.Short() {
		t.Skip("Integration tests skipped in short mode")
	}
	ctx := context.Background()
	ts := testutil.TokenSource(ctx, ScopeFullControl)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}
	projectID := testutil.ProjID()

	newBucket := projectID + suffix
	t.Logf("Testing admin with Bucket %q", newBucket)

	client, err := NewAdminClient(ctx, projectID, cloud.WithTokenSource(ts))
	if err != nil {
		t.Fatalf("Could not create client: %v", err)
	}
	defer client.Close()

	if err := client.CreateBucket(ctx, newBucket, nil); err != nil {
		t.Errorf("CreateBucket(%v, %v) failed %v", newBucket, nil, err)
	}
	if err := client.DeleteBucket(ctx, newBucket); err != nil {
		t.Errorf("DeleteBucket(%v) failed %v", newBucket, err)
		t.Logf("TODO: Warning this test left a new bucket in the cloud project, it must be deleted manually")
	}
	attrs := BucketAttrs{
		DefaultObjectACL: []ACLRule{{Entity: "domain-google.com", Role: RoleReader}},
	}
	if err := client.CreateBucket(ctx, newBucket, &attrs); err != nil {
		t.Errorf("CreateBucket(%v, %v) failed %v", newBucket, attrs, err)
	}
	if err := client.DeleteBucket(ctx, newBucket); err != nil {
		t.Errorf("DeleteBucket(%v) failed %v", newBucket, err)
		t.Logf("TODO: Warning this test left a new bucket in the cloud project, it must be deleted manually")
	}
}

func TestAll(t *testing.T) {
	if testing.Short() {
		t.Skip("Integration tests skipped in short mode")
	}
	// TODO(djd): Replace this ctx with context.Background() when the new API is complete.
	ctx := testutil.Context(ScopePubSub, ScopeCloudPlatform)
	if ctx == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}
	ts := testutil.TokenSource(ctx, ScopePubSub, ScopeCloudPlatform)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}

	now := time.Now()
	topicName := fmt.Sprintf("topic-%d", now.Unix())
	subName := fmt.Sprintf("subscription-%d", now.Unix())

	client, err := NewClient(ctx, testutil.ProjID(), cloud.WithTokenSource(ts))
	if err != nil {
		t.Fatalf("Creating client error: %v", err)
	}

	var topic *TopicHandle
	if topic, err = client.NewTopic(ctx, topicName); err != nil {
		t.Errorf("CreateTopic error: %v", err)
	}

	var sub *SubscriptionHandle
	if sub, err = topic.Subscribe(ctx, subName, nil); err != nil {
		t.Errorf("CreateSub error: %v", err)
	}

	exists, err := topic.Exists(ctx)
	if err != nil {
		t.Fatalf("TopicExists error: %v", err)
	}
	if !exists {
		t.Errorf("topic %s should exist, but it doesn't", topic)
	}

	exists, err = sub.Exists(ctx)
	if err != nil {
		t.Fatalf("SubExists error: %v", err)
	}
	if !exists {
		t.Errorf("subscription %s should exist, but it doesn't", subName)
	}

	max := 10
	msgs := make([]*Message, max)
	expectedMsgs := make(map[string]bool, max)
	for i := 0; i < max; i++ {
		text := fmt.Sprintf("a message with an index %d", i)
		attrs := make(map[string]string)
		attrs["foo"] = "bar"
		msgs[i] = &Message{
			Data:       []byte(text),
			Attributes: attrs,
		}
		expectedMsgs[text] = false
	}

	ids, err := Publish(ctx, topicName, msgs...)
	if err != nil {
		t.Fatalf("Publish (1) error: %v", err)
	}

	if len(ids) != max {
		t.Errorf("unexpected number of message IDs received; %d, want %d", len(ids), max)
	}

	expectedIDs := make(map[string]bool, max)
	for _, id := range ids {
		expectedIDs[id] = false
	}

	received, err := PullWait(ctx, subName, max)
	if err != nil {
		t.Fatalf("PullWait error: %v", err)
	}

	if len(received) != max {
		t.Errorf("unexpected number of messages received; %d, want %d", len(received), max)
	}

	for _, msg := range received {
		expectedMsgs[string(msg.Data)] = true
		expectedIDs[msg.ID] = true
		if msg.Attributes["foo"] != "bar" {
			t.Errorf("message attribute foo is expected to be 'bar', found '%s'", msg.Attributes["foo"])
		}
	}

	for msg, found := range expectedMsgs {
		if !found {
			t.Errorf("message '%s' should be received", msg)
		}
	}

//.........这里部分代码省略.........

func TestAll(t *testing.T) {
	if testing.Short() {
		t.Skip("Integration tests skipped in short mode")
	}
	ctx := context.Background()
	ts := testutil.TokenSource(ctx, ScopePubSub, ScopeCloudPlatform)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}

	now := time.Now()
	topicName := fmt.Sprintf("topic-%d", now.Unix())
	subName := fmt.Sprintf("subscription-%d", now.Unix())

	client, err := NewClient(ctx, testutil.ProjID(), cloud.WithTokenSource(ts))
	if err != nil {
		t.Fatalf("Creating client error: %v", err)
	}

	var topic *Topic
	if topic, err = client.NewTopic(ctx, topicName); err != nil {
		t.Errorf("CreateTopic error: %v", err)
	}

	var sub *Subscription
	if sub, err = client.NewSubscription(ctx, subName, topic, 0, nil); err != nil {
		t.Errorf("CreateSub error: %v", err)
	}

	exists, err := topic.Exists(ctx)
	if err != nil {
		t.Fatalf("TopicExists error: %v", err)
	}
	if !exists {
		t.Errorf("topic %s should exist, but it doesn't", topic)
	}

	exists, err = sub.Exists(ctx)
	if err != nil {
		t.Fatalf("SubExists error: %v", err)
	}
	if !exists {
		t.Errorf("subscription %s should exist, but it doesn't", subName)
	}

	msgs := []*Message{}
	for i := 0; i < 10; i++ {
		text := fmt.Sprintf("a message with an index %d", i)
		attrs := make(map[string]string)
		attrs["foo"] = "bar"
		msgs = append(msgs, &Message{
			Data:       []byte(text),
			Attributes: attrs,
		})
	}

	ids, err := topic.Publish(ctx, msgs...)
	if err != nil {
		t.Fatalf("Publish (1) error: %v", err)
	}

	if len(ids) != len(msgs) {
		t.Errorf("unexpected number of message IDs received; %d, want %d", len(ids), len(msgs))
	}

	want := make(map[string]*messageData)
	for i, m := range msgs {
		md := extractMessageData(m)
		md.ID = ids[i]
		want[md.ID] = md
	}

	// Use a timeout to ensure that Pull does not block indefinitely if there are unexpectedly few messages available.
	timeoutCtx, _ := context.WithTimeout(ctx, time.Minute)
	it, err := sub.Pull(timeoutCtx)
	if err != nil {
		t.Fatalf("error constructing iterator: %v", err)
	}
	defer it.Stop()
	got := make(map[string]*messageData)
	for i := 0; i < len(want); i++ {
		m, err := it.Next()
		if err != nil {
			t.Fatalf("error getting next message: %v", err)
		}
		md := extractMessageData(m)
		got[md.ID] = md
		m.Done(true)
	}

	if !reflect.DeepEqual(got, want) {
		t.Errorf("messages: got: %v ; want: %v", got, want)
	}

	// base64 test
	data := "[email protected]~"
	_, err = topic.Publish(ctx, &Message{Data: []byte(data)})
	if err != nil {
		t.Fatalf("Publish error: %v", err)
	}
//.........这里部分代码省略.........

// TestEndToEnd pumps many messages into a topic and tests that they are all delivered to each subscription for the topic.
// It also tests that messages are not unexpectedly redelivered.
func TestEndToEnd(t *testing.T) {
	if testing.Short() {
		t.Skip("Integration tests skipped in short mode")
	}
	ctx := context.Background()
	ts := testutil.TokenSource(ctx, ScopePubSub, ScopeCloudPlatform)
	if ts == nil {
		t.Skip("Integration tests skipped. See CONTRIBUTING.md for details")
	}

	now := time.Now()
	topicName := fmt.Sprintf("endtoend-%d", now.Unix())
	subPrefix := fmt.Sprintf("endtoend-%d", now.Unix())

	client, err := NewClient(ctx, testutil.ProjID(), cloud.WithTokenSource(ts))
	if err != nil {
		t.Fatalf("Creating client error: %v", err)
	}

	var topic *Topic
	if topic, err = client.NewTopic(ctx, topicName); err != nil {
		t.Fatalf("CreateTopic error: %v", err)
	}
	defer topic.Delete(ctx)

	// Three subscriptions to the same topic.
	var subA, subB, subC *Subscription
	if subA, err = client.NewSubscription(ctx, subPrefix+"-a", topic, ackDeadline, nil); err != nil {
		t.Fatalf("CreateSub error: %v", err)
	}
	defer subA.Delete(ctx)

	if subB, err = client.NewSubscription(ctx, subPrefix+"-b", topic, ackDeadline, nil); err != nil {
		t.Fatalf("CreateSub error: %v", err)
	}
	defer subB.Delete(ctx)

	if subC, err = client.NewSubscription(ctx, subPrefix+"-c", topic, ackDeadline, nil); err != nil {
		t.Fatalf("CreateSub error: %v", err)
	}
	defer subC.Delete(ctx)

	expectedCounts := make(map[string]int)
	for _, id := range publish(t, ctx, topic) {
		expectedCounts[id] = 1
	}

	// recv provides an indication that messages are still arriving.
	recv := make(chan struct{})

	// Keep track of the number of times each message (by message id) was
	// seen from each subscription.
	mcA := &messageCounter{counts: make(map[string]int), recv: recv}
	mcB := &messageCounter{counts: make(map[string]int), recv: recv}
	mcC := &messageCounter{counts: make(map[string]int), recv: recv}

	stopC := make(chan struct{})

	// We have three subscriptions to our topic.
	// Each subscription will get a copy of each pulished message.
	//
	// subA has just one iterator, while subB has two. The subB iterators
	// will each process roughly half of the messages for subB. All of
	// these iterators live until all messages have been consumed.  subC is
	// processed by a series of short-lived iterators.

	var wg sync.WaitGroup

	con := &consumer{
		concurrencyPerIterator: 1,
		iteratorsInFlight:      2,
		lifetimes:              immortal,
	}
	con.consume(t, ctx, subA, mcA, &wg, stopC)

	con = &consumer{
		concurrencyPerIterator: 1,
		iteratorsInFlight:      2,
		lifetimes:              immortal,
	}
	con.consume(t, ctx, subB, mcB, &wg, stopC)

	con = &consumer{
		concurrencyPerIterator: 1,
		iteratorsInFlight:      2,
		lifetimes: &explicitLifetimes{
			lifetimes: []time.Duration{ackDeadline, ackDeadline, ackDeadline / 2, ackDeadline / 2},
		},
	}
	con.consume(t, ctx, subC, mcC, &wg, stopC)

	go func() {
		timeoutC := time.After(timeout)
		// Every time this ticker ticks, we will check if we have received any
		// messages since the last time it ticked.  We check less frequently
		// than the ack deadline, so that we can detect if messages are
		// redelivered after having their ack deadline extended.
		checkQuiescence := time.NewTicker(ackDeadline * 3)
//.........这里部分代码省略.........