public async Task GetFileTest()
{
var provider = new FileSystemProvider(BaseDir);
var filename = Path.GetRandomFileName();
var outputFileName = Path.GetTempFileName();
var add = await provider.AddFile(RandomFileGenerator.RandomFileByteArray(1000), filename);
await provider.DownloadToFile(filename, outputFileName, true);//overdie if exists since gettempfileme creates the file
var file = File.ReadAllBytes(outputFileName);
Assert.IsTrue(await provider.FileExists(filename));
File.Delete(outputFileName);
}