Code

@DataJpaTest
class ImageRepositoryTest {
    private final ImageRepository imageRepository;
    private final ImageStore imageStore;
    private static final String imagePath = "/Users/josh/Documents/Python/test_image.jpeg";

    @Autowired
    ImageRepositoryTest(ImageRepository imageRepository, ImageStore imageStore) {
        this.imageRepository = imageRepository;
        this.imageStore = imageStore;
    }

    @BeforeEach
    void setUp() {
        for (int i = 0; i < 5; i++) {
            imageStore.setContent(imageRepository.save(new Image()),
                    DataUtilities.fileToInputStream(imagePath));
        }
    }

    @Test
    void sumTotalImagesSize() {
        System.out.println(imageRepository.sumTotalImagesSize());
    }
}