public async Task FileStorageGetCustomExtensionFromMimeType()
        {
            var downloader = new MimeTyper(true, MimeTyperLoadMode.File);
            await downloader.AddCustomMimeType(new MimeTyperItem { Extension = "purple", MimeType = "application/purplesoft-io" });

            var ext = await downloader.GetExtensionFromMimeType("application/purplesoft-io");

            Assert.Equal("purple", ext);
        }
        public async Task GetMimeTypeFromCustomExtension()
        {
            var downloader = new MimeTyper();
            await downloader.AddCustomMimeType(new MimeTyperItem { Extension = "purple", MimeType = "application/purplesoft-io" });

            var ext = await downloader.GetMimeTypeFromExtension("logo-finaleaaa.purple");

            Assert.Equal("application/purplesoft-io", ext);
        }