ainame / database_rewinder

minimalist's tiny and ultra-fast database cleaner

DatabaseRewinder

database_rewinder is a minimalist's tiny and ultra-fast database cleaner.

Features

• Cleans up tables via DELETE SQL. No other strategies are implemented ATM
• Supports multiple databases
• Runs extremely fast 💨

Why is it fast?

database_rewinder memorizes every table name into which INSERT SQL was performed during each test case. Then it executes DELETE SQL only against these tables when cleaning. So, the more number of tables you have in your database, the more benefit you will get.

Credit

This strategy was originally devised and implemented by @eudoxa.

Supported versions

• ActiveRecord 3.2, 4.0, 4.1

• Ruby 2.0, 2.1

Installation

Add this line to your Gemfile's :test group:

gem 'database_rewinder'

And then execute:

$ bundle

Usage

Do clean in after(:each). And do clean_all or clean_with in before(:suite) if you'd like to.

RSpec.configure do |config|
  config.before :suite do
    DatabaseRewinder.clean_all
    # or
    # DatabaseRewinder.clean_with :any_arg_that_would_be_actually_ignored_anyway
  end

  config.after :each do
    DatabaseRewinder.clean
  end
end

Pro Tip

database_rewinder is designed to be almost compatible with database_cleaner. So the following code will probably let your existing app work under database_rewinder without making any change on your configuration.

DatabaseCleaner = DatabaseRewinder

Contributing

Send me your pull requests.