Programming language: Go
License: MIT License
Tags: Testing     Testing Frameworks    
Latest version: v2.3.0

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Clean database for testing, inspired by database_cleaner for Ruby. It uses flock syscall under the hood to make sure the test can runs in parallel without racing issues.

Basic usage

  • To get the package, execute:
go get gopkg.in/khaiql/dbcleaner.v2
  • To import this package, add the following line to your code:
import "gopkg.in/khaiql/dbcleaner.v2"
  • To install TestSuite:
go get github.com/stretchr/testify
  • For people who is using old version (v1.0), please change your import to go import "gopkg.in/khaiql/dbcleaner.v1"


During running test suites, there might be deadlock when 2 suites try to acquire the same table. Dbcleaner tries to mitigate the issue by providing options for retry and panic when the deadlock couldn't be resolved after excessive retries.

type Options struct {
    Logger        logging.Logger
    LockTimeout   time.Duration
    NumberOfRetry int
    RetryInterval time.Duration

type Option func(opt *Options)

// SetLogger to an instance of logging.Logger, default to Noop
func SetLogger(logger logging.Logger) Option {
    return func(opt *Options) {
        opt.Logger = logger

// SetLockTimeout sets timeout for locking operation, default to 10 seconds
func SetLockTimeout(d time.Duration) Option {
    return func(opt *Options) {
        opt.LockTimeout = d

// SetNumberOfRetry sets max retries for acquire the table, default to 5 times
func SetNumberOfRetry(t int) Option {
    return func(opt *Options) {
        opt.NumberOfRetry = t

// SetRetryInterval sets sleep duration between each retry, default to 10 seconds
func SetRetryInterval(d time.Duration) Option {
    return func(opt *Options) {
        opt.RetryInterval = d

// SetLockFileDir sets directory for lock files
func SetLockFileDir(dir string) Option {
    return func(opt *Options) {
        opt.LockFileDir = dir

cleaner := dbcleaner.New(SetNumberOfRetry(10), SetLockTimeout(5*time.Second))

Using with testify's suite

import (


var Cleaner = dbcleaner.New()

type ExampleSuite struct {

func (suite *ExampleSuite) SetupSuite() {
    // Init and set mysql cleanup engine
    mysql := engine.NewMySQLEngine("YOUR_DB_DSN")

func (suite *ExampleSuite) SetupTest() {

func (suite *ExampleSuite) TearDownTest() {

func (suite *ExampleSuite) TestSomething() {
    // Have some meaningful test
    suite.Equal(true, true)

func TestRunSuite(t *testing.T) {
    suite.Run(t, new(ExampleSuite))

Support drivers

  • postgres
  • mysql
  • sqlite3

Write cleaner for other drivers

Basically all drivers supported by database/sql package are also supported by dbcleaner. Check list of drivers: https://github.com/golang/go/wiki/SQLDrivers

For custom driver, implement your own engine.Engine interface and call SetEngine on dbcleaner.Cleaner instance.



*Note that all licence references and agreements mentioned in the dbcleaner README section above are relevant to that project's source code only.