What is the correct way to do a unit test to upload a file?

Question

symfony

Can you please tell me how to do a unit test for uploading a file (symphony 4)?

controller

class ProductController extends AbstractController
{
    /**
     * @Route("/", name="app_product_new")
     */
    public function new(Request $request)
    {
        $productes = $this->getDoctrine()->getRepository(Product::class)->findAll();
        $product = new Product();
        $form = $this->createForm(ProductType::class, $product);

        $form->handleRequest($request);

        if ($form->isSubmitted() ) {
            /** @var UploadedFile $brochureFile */
            $brochureFile = $form->get('brochure')->getData();

            // this condition is needed because the 'brochure' field is not required
            // so the PDF file must be processed only when a file is uploaded
            if ($brochureFile) {
                $originalFilename = pathinfo($brochureFile->getClientOriginalName(), PATHINFO_FILENAME);
                // this is needed to safely include the file name as part of the URL
                $safeFilename = $originalFilename;
                $newFilename = $safeFilename.'-'.uniqid().'.'.$brochureFile->guessExtension();

                // Move the file to the directory where brochures are stored
                try {
                    $brochureFile->move(
                        $this->getParameter('brochures_directory'),
                        $newFilename
                    );
                } catch (FileException $e) {
                    // ... handle exception if something happens during file upload
                }

                // updates the 'brochureFilename' property to store the PDF file name
                // instead of its contents
                $product->setBrochureFilename($newFilename);

                $em = $this->getDoctrine()->getManager(); // getManager отвечает за взаимодейтсвие с БД
                $em->persist($product); // добавляет объект в БД
                $em->flush(); // выполняет все ранее поставленные инстукции
            }

            // ... persist the $product variable or any other work

            return $this->redirect($this->generateUrl('csv', ['id' => $product->getId()]));
        }

        return $this->render('product/new.html.twig', [
            'form' => $form->createView(),
            'productes' => $productes
        ]);
    }
}

Form Type

class ProductType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            // ...
            ->add('brochure', FileType::class, [
                'label' => 'Invoice CSV: ',

                // unmapped means that this field is not associated to any entity property
                'mapped' => false,

                // make it optional so you don't have to re-upload the CSV file
                // every time you edit the Product details
                'required' => false,

                // unmapped fields can't define their validation using annotations
                // in the associated entity, so you can use the PHP constraint classes
                'constraints' => [
                    new File([
                        'maxSize' => '1024k',
                        'mimeTypes' => [
                            'text/plain',
                            'text/csv',
                            'text/csv-schema',
                            'application/csvm+json',
                        ],
                        'mimeTypesMessage' => 'Please upload a valid CSV document',
                    ])
                ],
            ])
            // ...
        ;

    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => Product::class,
        ]);
    }
}

test/controller

class ResponseStatus extends WebTestCase
{
    public function testShowPost()
    {
        $client = static::createClient();

        $csv = new UploadedFile(
            '/var/www/testwork.loc/public/uploads/brochures/file_valid-5ec3f39f6903e.txt',
            'file_valid-5ec3f39f6903e.txt',
            'text/plain',
            123
        );
        $client->request(
            'POST',
            '/',
//            array('name' => 'Fabien'),
            array('brochure' => $csv)
        );

    }
}

Answer:

OK, but incomplete, skipped, or risky tests!
Tests: 1, Assertions: 0, Risky: 1.