You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: txnoffsetcommit_test.go
    path of file: ./repos/kafka-go
    
    the code of the file until where you have to start completion: package kafka

import (
	"context"
	"log"
	"os"
	"strconv"
	"testing"
	"time"

	ktesting "github.com/segmentio/kafka-go/testing"
)

func TestClientTxnOffsetCommit(t *testing.T) {
	if !ktesting.KafkaIsAtLeast("0.11.0") {
		t.Skip("Skipping test because kafka version is not high enough.")
	}

	transactionalID := makeTransactionalID()
	topic := makeTopic()

	client, shutdown := newLocalClientWithTopic(topic, 1)
	defer shutdown()

	now := time.Now()

	const N = 10
	records := make([]Record, 0, N)
	for i := 0; i < N; i++ {
		records = append(records, Record{
			Time:  now,
			Value: NewBytes([]byte("test-message-" + strconv.Itoa(i))),
		})
	}
	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	res, err := client.Produce(ctx, &ProduceRequest{
		Topic:        topic,
		RequiredAcks: RequireAll,
		Records:      NewRecordReader(records...),
	})
	if err != nil {
		t.Fatal(err)
	}

	if res.Error != nil {
		t.Error(res.Error)
	}

	for index, err := range res.RecordErrors {
		t.Fatalf("record at index %d produced an error: %v", index, err)
	}

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	respc, err := waitForCoordinatorIndefinitely(ctx, client, &FindCoordinatorRequest{
		Addr:    client.Addr,
		Key:     transactionalID,
		KeyType: CoordinatorKeyTypeTransaction,
	})
	if err != nil {
		t.Fatal(err)
	}

	if respc.Error != nil {
		t.Fatal(respc.Error)
	}

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	respc, err = waitForCoordinatorIndefinitely(ctx, client, &FindCoordinatorRequest{
		Addr:    client.Addr,
		Key:     transactionalID,
		KeyType: CoordinatorKeyTypeConsumer,
	})
	if err != nil {
		t.Fatal(err)
	}

	if respc.Error != nil {
		t.Fatal(respc.Error)
	}

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	ipResp, err := client.InitProducerID(ctx, &InitProducerIDRequest{
		TransactionalID:      transactionalID,
		TransactionTimeoutMs: 10000,
	})
	if err != nil {
		t.Fatal(err)
	}

	if ipResp.Error != nil {
		t.Fatal(ipResp.Error)
	}

	groupID := makeGroupID()

	group, err := NewConsumerGroup(ConsumerGroupConfig{
		ID:                groupID,
		Topics:            []string{topic},
		Brokers:           []string{"localhost:9092"},
		HeartbeatInterval: 2 * time.Sec
    
func TestClientTxnOffsetCommit(t *testing.T) {
	if !ktesting.KafkaIsAtLeast("0.11.0") {
		t.Skip("Skipping test because kafka version is not high enough.")
	}

	transactionalID := makeTransactionalID()
	topic := makeTopic()

	client, shutdown := newLocalClientWithTopic(topic, 1)
	defer shutdown()

	now := time.Now()

	const N = 10
	records := make([]Record, 0, N)
	for i := 0; i < N; i++ {
		records = append(records, Record{
			Time:  now,
			Value: NewBytes([]byte("test-message-" + strconv.Itoa(i))),
		})
	}
	ctx, cancel := context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	res, err := client.Produce(ctx, &ProduceRequest{
		Topic:        topic,
		RequiredAcks: RequireAll,
		Records:      NewRecordReader(records...),
	})
	if err != nil {
		t.Fatal(err)
	}

	if res.Error != nil {
		t.Error(res.Error)
	}

	for index, err := range res.RecordErrors {
		t.Fatalf("record at index %d produced an error: %v", index, err)
	}

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	respc, err := waitForCoordinatorIndefinitely(ctx, client, &FindCoordinatorRequest{
		Addr:    client.Addr,
		Key:     transactionalID,
		KeyType: CoordinatorKeyTypeTransaction,
	})
	if err != nil {
		t.Fatal(err)
	}

	if respc.Error != nil {
		t.Fatal(respc.Error)
	}

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	respc, err = waitForCoordinatorIndefinitely(ctx, client, &FindCoordinatorRequest{
		Addr:    client.Addr,
		Key:     transactionalID,
		KeyType: CoordinatorKeyTypeConsumer,
	})
	if err != nil {
		t.Fatal(err)
	}

	if respc.Error != nil {
		t.Fatal(respc.Error)
	}

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	ipResp, err := client.InitProducerID(ctx, &InitProducerIDRequest{
		TransactionalID:      transactionalID,
		TransactionTimeoutMs: 10000,
	})
	if err != nil {
		t.Fatal(err)
	}

	if ipResp.Error != nil {
		t.Fatal(ipResp.Error)
	}

	groupID := makeGroupID()

	group, err := NewConsumerGroup(ConsumerGroupConfig{
		ID:                groupID,
		Topics:            []string{topic},
		Brokers:           []string{"localhost:9092"},
		HeartbeatInterval: 2 * time.Second,
		RebalanceTimeout:  2 * time.Second,
		RetentionTime:     time.Hour,
		Logger:            log.New(os.Stdout, "cg-test: ", 0),
	})
	if err != nil {
		t.Fatal(err)
	}
	defer group.Close()

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	gen, err := group.Next(ctx)
	if err != nil {
		t.Fatal(err)
	}

	apresp, err := client.AddPartitionsToTxn(ctx, &AddPartitionsToTxnRequest{
		TransactionalID: transactionalID,
		ProducerID:      ipResp.Producer.ProducerID,
		ProducerEpoch:   ipResp.Producer.ProducerEpoch,
		Topics: map[string][]AddPartitionToTxn{
			topic: {
				{
					Partition: 0,
				},
			},
		},
	})
	if err != nil {
		t.Fatal(err)
	}

	appartition := apresp.Topics[topic]
	if len(appartition) != 1 {
		t.Fatalf("unexpected partition count; expected: 1, got: %d", len(appartition))
	}

	for _, partition := range appartition {
		if partition.Error != nil {
			t.Fatal(partition.Error)
		}
	}

	client.AddOffsetsToTxn(ctx, &AddOffsetsToTxnRequest{
		TransactionalID: transactionalID,
		ProducerID:      ipResp.Producer.ProducerID,
		ProducerEpoch:   ipResp.Producer.ProducerEpoch,
		GroupID:         groupID,
	})

	ctx, cancel = context.WithTimeout(context.Background(), time.Second*30)
	defer cancel()
	resp, err := client.TxnOffsetCommit(ctx, &TxnOffsetCommitRequest{
		TransactionalID: transactionalID,
		GroupID:         groupID,
		MemberID:        gen.MemberID,
		ProducerID:      ipResp.Producer.ProducerID,
		ProducerEpoch:   ipResp.Producer.ProducerEpoch,
		GenerationID:    int(gen.ID),
		GroupInstanceID: groupID,
		Topics: map[string][]TxnOffsetCommit{
			topic: {
				{
					Partition: 0,
					Offset:    10,
				},
			},
		},
	})
	if err != nil {
		t.Fatal(err)
	}

	partitions := resp.Topics[topic]

	if len(partitions) != 1 {
		t.Fatalf("unexpected partition count; expected: 1, got: %d", len(partitions))
	}

	for _, partition := range partitions {
		if partition.Error != nil {
			t.Fatal(partition.Error)
		}
	}

	err = clientEndTxn(client, &EndTxnRequest{
		TransactionalID: transactionalID,
		ProducerID:      ipResp.Producer.ProducerID,
		ProducerEpoch:   ipResp.Producer.ProducerEpoch,
		Committed:       true,
	})
	if err != nil {
		t.Fatal(err)
	}

	// seems like external visibility of the commit isn't
	// synchronous with the EndTxn request. This seems
	// to give enough time for the commit to become consistently visible.
	<-time.After(time.Second)

	ofr, err := client.OffsetFetch(ctx, &OffsetFetchRequest{
		GroupID: groupID,
		Topics:  map[string][]int{topic: {0}},
	})
	if err != nil {
		t.Fatal(err)
	}

	if ofr.Error != nil {
		t.Error(ofr.Error)
	}

	fetresps := ofr.Topics[topic]
	if len(fetresps) != 1 {
		t.Fatalf("unexpected 1 offsetfetchpartition responses; got %d", len(fetresps))
	}

	for _, r := range fetresps {
		if r.Error != nil {
			t.Fatal(r.Error)
		}

		if r.CommittedOffset != 10 {
			t.Fatalf("expected committed offset to be 10; got: %v for partition: %v", r.CommittedOffset, r.Partition)
		}
	}
}