public function testLoadShipmentId()
{
$shipmentModelMock = $this->getMockBuilder('Magento\\Sales\\Model\\Order\\Shipment')->disableOriginalConstructor()->setMethods([])->getMock();
$this->shipmentRepositoryMock->expects($this->once())->method('get')->with($this->loader->getShipmentId())->willReturn($shipmentModelMock);
$this->registryMock->expects($this->once())->method('register')->with('current_shipment', $shipmentModelMock);
$this->assertEquals($shipmentModelMock, $this->loader->load());
}
