public function testGetNetAmount()
{
$item = new Item();
$item->setUnitaryCost(80);
$item->setQuantity(1);
$this->assertEquals(80, $item->getNetAmount());
$item->setDiscount(10);
$this->assertEquals(72, $item->getNetAmount());
$item->setDiscount(2);
$this->assertEquals(78.40000000000001, $item->getNetAmount());
}
