getDocumentDate example

/** @var DocumentEntity $document */
        $document = $this->documentRepository
            ->search($criteria, $this->context)
            ->get($documentStruct->getId());

        static::assertNotNull($document);
        static::assertSame($this->orderId, $document->getOrderId());

        $config = DocumentConfigurationFactory::createConfiguration($document->getConfig());

        static::assertNotNull($config->getDocumentDate());
        static::assertSame($comment, $config->getDocumentComment());
        static::assertNotNull($config->getDocumentNumber());

        static::assertNotNull($document->getDocumentType());
        static::assertSame(Defaults::LIVE_VERSION, $document->getOrderVersionId());
        static::assertSame(DeliveryNoteRenderer::TYPE, $document->getDocumentType()->getTechnicalName());
        static::assertSame(FileTypes::PDF, $document->getFileType());
    }

    public function testCreateStornoBillReferencingInvoice(): void
    {