How to set up database_cleaner for Rails with Cucumber and RSpec

Copy# features/support/database_cleaner.rb

DatabaseCleaner.clean_with(:deletion) # clean once, now
DatabaseCleaner.strategy = :transaction
Cucumber::Rails::Database.javascript_strategy = :deletion

Copy# features/support/env.rb

require 'features/support/database_cleaner'
require 'cucumber/rails/active_record'
require 'cucumber/rails/world'
Cucumber::Rails::World.use_transactional_fixtures = false

Copy# spec/support/database_cleaner.rb

RSpec.configure do |config|
  config.before(:suite) do
    DatabaseCleaner.strategy = :transaction
    DatabaseCleaner.clean_with(:deletion)
  end

  config.around do |example|
    DatabaseCleaner.start
    example.run
    DatabaseCleaner.clean
  end
end

Copy# spec/spec_helper.rb

RSpec.configure do |config|
  config.use_transactional_fixtures = false
end 

Copyaround do |example|
  superuser_power = Power.new(create(:user, :superuser))
  Power.with_power(superuser_power) do
    # before-block will be run here, DB snapshot will be created
    example.run
    # after-block will be run here, restore of DB
  end
end