@Override
    public void upload(final List<Image> images, final List<MultipartFile> fileImages) {
        IntStream.range(0, images.size())
                .forEach(index -> saveFile(
                        fileImages.get(index),
                        images.get(index).getUniqueName()
                ));
    }
@Test
    void 이미지를_업로드한다() {
        // given
        List<Image> images = List.of(이미지를_생성한다());
        List<MultipartFile> fileImages = List.of(file);

        // when & then
        assertDoesNotThrow(() -> imageUploader.upload(images, fileImages));
    }