public async Task SHA512_from_file_async()
{
var sha = SHA512Value.ComputeFileSHA512(ThisFile);
var sha2 = await SHA512Value.ComputeFileSHA512Async(ThisFile);
sha2.Should().Be(sha);
using (var compressedPath = new TemporaryFile())
{
using (var input = new FileStream(ThisFile, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.SequentialScan | FileOptions.Asynchronous))
using (var compressed = new FileStream(compressedPath.Path, FileMode.Truncate, FileAccess.Write, FileShare.None, 4096, FileOptions.SequentialScan | FileOptions.Asynchronous))
{
var writer = GetCompressShellAsync(w => input.CopyToAsync(w));
await writer(compressed);
}
var shaCompressed = await SHA512Value.ComputeFileSHA512Async(compressedPath.Path);
shaCompressed.Should().NotBe(sha);
var localSha = await SHA512Value.ComputeFileSHA512Async(compressedPath.Path, r => new GZipStream(r, CompressionMode.Decompress, true));
localSha.Should().Be(sha);
}
}
