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: graveler_mock.go
    path of file: ./repos/lakeFS/pkg/graveler/testutil
    
    the code of the file until where you have to start completion: package testutil

import (
	"testing"

	"github.com/golang/mock/gomock"
	"github.com/treeverse/lakefs/pkg/graveler"
	"github.com/treeverse/lakefs/pkg/graveler/mock"
	kvmock "github.com/treeverse/lakefs/pkg/kv/mock"
)

type GravelerTest struct {
	Controller               *gomock.Controller
	CommittedManager         *mock.MockCommittedManager
	RefManager               *mock.MockRefManager
	StagingManager           *mock.MockStagingManager
	ProtectedBranchesManager *mock
    
func InitGravelerTest(t *testing.T) *GravelerTest {
	ctrl := gomock.NewController(t)

	test := &GravelerTest{
		Controller:               ctrl,
		CommittedManager:         mock.NewMockCommittedManager(ctrl),
		StagingManager:           mock.NewMockStagingManager(ctrl),
		RefManager:               mock.NewMockRefManager(ctrl),
		GarbageCollectionManager: mock.NewMockGarbageCollectionManager(ctrl),
		ProtectedBranchesManager: mock.NewMockProtectedBranchesManager(ctrl),
		KVStore:                  kvmock.NewMockStore(ctrl),
	}

	test.Sut = graveler.NewGraveler(test.CommittedManager, test.StagingManager, test.RefManager, test.GarbageCollectionManager, test.ProtectedBranchesManager)

	return test
}