/**
* Testing adding amount to PayPal refunded amount
*/
public function testAddRefundedAmount_NotEmpty()
{
$oOrderPayment = new oePayPalOrderPayment();
$oOrderPayment->setRefundedAmount(100);
$oOrderPayment->addRefundedAmount(100);
$this->assertEquals(200, $oOrderPayment->getRefundedAmount());
}