addTransaction example

public function testItThrowsIfRefundNotFound(): void
    {
        // capture has no refund         $capture = (new OrderTransactionCaptureBuilder($this->ids, 'capture', $this->ids->get('transaction')))
            ->build();

        $transaction = (new OrderTransactionBuilder($this->ids, 'transaction'))
            ->addCapture('capture', $capture)
            ->build();

        $order = (new OrderBuilder($this->ids, '10000'))
            ->addTransaction('transaction', $transaction)
            ->build();

        $this->orderRepository->upsert([$order], Context::createDefaultContext());

        if (!Feature::isActive('v6.6.0.0')) {
            static::expectException(UnknownRefundException::class);
        }
        static::expectException(PaymentException::class);
        static::expectExceptionMessage('The Refund process failed with following exception: Unknown refund with id ' . $this->ids->get('refund') . '.');

        $this->paymentRefundProcessor->processRefund($this->ids->get('refund'), Context::createDefaultContext());
    }