_model = Bootstrap::getObjectManager()->create(\Magento\Sales\Model\Convert\Order::class); } /** * @magentoDataFixture Magento/Sales/_files/order.php */ public function testConvertToCreditmemo() { /** @var \Magento\Sales\Model\Order $order */ $order = Bootstrap::getObjectManager()->create(\Magento\Sales\Model\Order::class); $order->loadByIncrementId('100000001'); //MAGETWO-45612 fix $order->setBaseShippingAmount(5); $this->assertNull($this->_model->toCreditmemo($order)->getBaseShippingAmount()); } }