public function testGetTotalAmount()
{
$rowTotal = 10;
$discountAmount = 2;
$expectedResult = 8;
$this->itemMock->expects($this->once())->method('getRowTotal')->will($this->returnValue($rowTotal));
$this->itemMock->expects($this->once())->method('getDiscountAmount')->will($this->returnValue($discountAmount));
$this->assertEquals($expectedResult, $this->defaultColumn->getTotalAmount($this->itemMock));
}
