def transactional_specs rspec_config
  rspec_config.before do
    @_spec_transaction = DataMapper::Transaction.new DataMapper.repository(:default).adapter
    @_spec_transaction.begin
    DataMapper.repository(:default).adapter.push_transaction @_spec_transaction
  end
  rspec_config.after do
    DataMapper.repository(:default).adapter.pop_transaction
    @_spec_transaction.rollback
  end
end

Spec::Runner.configure do |config|
  transactional_specs(config)
end