public function testProcessRelations()
{
$this->shipmentMock->expects($this->once())->method('getId')->willReturn('shipment-id-value');
$this->shipmentMock->expects($this->exactly(2))->method('getItems')->willReturn([$this->itemMock]);
$this->shipmentMock->expects($this->exactly(2))->method('getComments')->willReturn([$this->commentMock]);
$this->shipmentMock->expects($this->exactly(2))->method('getTracks')->willReturn([$this->trackMock]);
$this->itemMock->expects($this->once())->method('setParentId')->with('shipment-id-value')->willReturnSelf();
$this->itemResourceMock->expects($this->once())->method('save')->with($this->itemMock)->willReturnSelf();
$this->commentResourceMock->expects($this->once())->method('save')->with($this->commentMock)->willReturnSelf();
$this->trackResourceMock->expects($this->once())->method('save')->with($this->trackMock)->willReturnSelf();
$this->relationProcessor->processRelation($this->shipmentMock);
}