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: pubsub_default_registration_test.go
    path of file: ./repos/protoactor-go/cluster/cluster_test_tool
    
    the code of the file until where you have to start completion: package cluster_test_tool

import (
	"strconv"
	"testing"

	"github.com/stretchr/testify/suite"
)

type PubSubDefaultRegistrationTestSuite struct {
	suite.Suite
	fixture *PubSubClusterFixture
}

func (suite *PubSubDefaultRegistration
    
func (suite *PubSubDefaultRegistrationTestSuite) TestPubSubWorksWithDefaultTopicRegistration() {
	subscriberIds := suite.fixture.SubscriberIds("topic-default", 20)
	const topic = "topic-default-registration"
	const numMessage = 100

	suite.fixture.SubscribeAllTo(topic, subscriberIds)

	for i := 0; i < numMessage; i++ {
		data, err := suite.fixture.PublishData(topic, i)
		suite.Assert().NoError(err, "message "+strconv.Itoa(i)+" should not has error")
		suite.Assert().NotNil(data, "response "+strconv.Itoa(i)+" should not be nil")
	}

	suite.fixture.VerifyAllSubscribersGotAllTheData(subscriberIds, numMessage)
}