function test_it_can_create_a_refund()
{
$this->guardAgainstInvalidPaymentToRefund();
$config = (require __DIR__ . '/../config.php');
$payment = $this->api->getPayment($config['paymentToRefund']);
$refund = (new Refund())->of($payment)->returning($payment->getAmount())->totalling($payment->getAmount());
$refund = $this->api->createRefund($refund);
$this->assertInstanceOf('GoCardless\\Pro\\Models\\Refund', $refund);
$this->assertNotNull($refund->getId());
$this->assertNotNull($refund->getCreatedAt());
$this->assertSame($payment->getAmount(), $refund->getAmount());
$this->assertSame('GBP', $refund->getCurrency());
}