public function testSetters()
{
$order = new Order();
$order->setBuyer(new Buyer());
$this->assertInstanceOf('Team3\\PayU\\Order\\Model\\Buyer\\BuyerInterface', $order->getBuyer());
$order->setProductCollection(new ProductCollection());
$this->assertInstanceOf('Team3\\PayU\\Order\\Model\\Products\\ProductCollectionInterface', $order->getProductCollection());
$order->setShippingMethodCollection(new ShippingMethodCollection());
$this->assertInstanceOf('Team3\\PayU\\Order\\Model\\ShippingMethods\\ShippingMethodCollectionInterface', $order->getShippingMethodCollection());
$order->setStatus(new OrderStatus());
$this->assertInstanceOf('Team3\\PayU\\Order\\Model\\OrderStatus', $order->getStatus());
$order->setShippingMethodCollectionFromDeserialization([new ShippingMethod(), new ShippingMethod()]);
$this->assertCount(2, $order->getShippingMethodCollection());
$this->assertInstanceOf('Team3\\PayU\\Order\\Model\\ShippingMethods\\ShippingMethodCollection', $order->getShippingMethodCollection());
$order->setCreatedAt(new \DateTime(self::CREATED_AT));
$this->assertInstanceOf('\\DateTime', $order->getCreatedAt());
$this->assertEquals(self::CREATED_AT, $order->getCreatedAt()->format(self::CREATED_AT_FORMAT));
}