module Rspec::Rails::TransactionalDatabaseSupport

def active_record_configured?
  defined?(::ActiveRecord) && !::ActiveRecord::Base.configurations.blank?
end

def setup_transactional_examples
  return unless use_transactional_examples?
  ::ActiveRecord::Base.connection.increment_open_transactions
  ::ActiveRecord::Base.connection.begin_db_transaction
end

def teardown_transactional_examples
  return unless use_transactional_examples?
  if ::ActiveRecord::Base.connection.open_transactions != 0
    ::ActiveRecord::Base.connection.rollback_db_transaction
    ::ActiveRecord::Base.connection.decrement_open_transactions
  end
  ::ActiveRecord::Base.clear_active_connections!
end

def use_transactional_examples?
  active_record_configured? && Rspec.configuration.use_transactional_examples?
end