/**
  * Test case for oePayPalPayPalOrder::addRefundedAmount()
  * Tests adding amount to PayPal refunded amount
  *
  * @return null
  */
 public function testAddRefundedAmountWhenEmpty()
 {
     $oOrder = new oePayPalPayPalOrder();
     $oOrder->addRefundedAmount(100.29);
     $oOrder->addRefundedAmount(899.7);
     $this->assertEquals(999.99, $oOrder->getRefundedAmount());
 }