GenerateThumbnailsHandler example

$this->getPublicFilesystem()->has($path),
                'Thumbnail: ' . $path . ' does not exist'
            );
        }
    }

    public function testDiffersBetweenUpdateAndGenerateMessage(): void
    {
        $thumbnailServiceMock = $this->getMockBuilder(ThumbnailService::class)
            ->disableOriginalConstructor()->getMock();

        $handler = new GenerateThumbnailsHandler($thumbnailServiceMock, $this->mediaRepository);

        $randomCriteria = (new Criteria())
            /* @see GenerateThumbnailsHandler Association as in target method is required for the ease of PHPUnit's constraint evaluation */
            ->addAssociation('mediaFolder.configuration.mediaThumbnailSizes')
            ->setLimit(5);

        $testEntities1 = $this->mediaRepository->search($randomCriteria->setOffset(0), $this->context)->getEntities();
        $testEntities2 = $this->mediaRepository->search($randomCriteria->setOffset(5), $this->context)->getEntities();
        $testEntities3 = $this->mediaRepository->search($randomCriteria->setOffset(10), $this->context)->getEntities();

        $generateMessage = new GenerateThumbnailsMessage();