MAGETWO-60053: [Backport] Revert major changes in PaymentAdapter - 2.1.3

Author: valdislav

app/code/Magento/Sales/Test/Unit/Model/Order/PaymentAdapterTest.php

@@ -25,11 +25,6 @@ class PaymentAdapterTest extends \PHPUnit_Framework_TestCase
      */
     private $creditmemoMock;
 
-    /**
-     * @var \Magento\Sales\Model\Order\Creditmemo\RefundOperation|\PHPUnit_Framework_MockObject_MockObject
-     */
-    private $refundOperationMock;
-
     /**
      * @var \Magento\Sales\Api\Data\InvoiceInterface|\PHPUnit_Framework_MockObject_MockObject
      */
@@ -50,10 +45,6 @@ protected function setUp()
             ->disableOriginalConstructor()
             ->getMockForAbstractClass();
 
-        $this->refundOperationMock = $this->getMockBuilder(\Magento\Sales\Model\Order\Creditmemo\RefundOperation::class)
-            ->disableOriginalConstructor()
-            ->getMock();
-
         $this->invoiceMock = $this->getMockBuilder(\Magento\Sales\Api\Data\InvoiceInterface::class)
             ->disableOriginalConstructor()
             ->getMockForAbstractClass();
@@ -63,24 +54,10 @@ protected function setUp()
             ->getMock();
 
         $this->subject = new \Magento\Sales\Model\Order\PaymentAdapter(
-            $this->refundOperationMock,
             $this->payOperationMock
         );
     }
 
-    public function testRefund()
-    {
-        $isOnline = true;
-        $this->refundOperationMock->expects($this->once())
-            ->method('execute')
-            ->with($this->creditmemoMock, $this->orderMock, $isOnline)
-            ->willReturn($this->orderMock);
-        $this->assertEquals(
-            $this->orderMock,
-            $this->subject->refund($this->creditmemoMock, $this->orderMock, $isOnline)
-        );
-    }
-
     public function testPay()
     {
         $isOnline = true;