public async Task VerifyChecksumAsync_Data_Is_Truncated_If_Verification_Fails() { // Checksum is for "hello world" const string incorrectChecksum = "Kq5sNclPz7QV2+lfQIuc6R7oRu0="; const string message = "Hello World 12345!!@@åäö"; var buffer = new UTF8Encoding(false).GetBytes(message); // Test complete upload var fileId = await _fixture.Store.CreateFileAsync(buffer.Length, null, CancellationToken.None); using (var stream = new MemoryStream(buffer)) { await _fixture.Store.AppendDataAsync(fileId, stream, CancellationToken.None); } var checksumOk = await _fixture.Store .VerifyChecksumAsync(fileId, "sha1", Convert.FromBase64String(incorrectChecksum), CancellationToken.None); // File should not have been saved. checksumOk.ShouldBeFalse(); var filePath = Path.Combine(_fixture.Path, fileId); new FileInfo(filePath).Length.ShouldBe(0); // Test chunked upload fileId = await _fixture.Store.CreateFileAsync(buffer.Length, null, CancellationToken.None); using (var stream = new MemoryStream(buffer.Take(10).ToArray())) { // Write first 10 bytes await _fixture.Store.AppendDataAsync(fileId, stream, CancellationToken.None); } using (var stream = new MemoryStream(buffer.Skip(10).ToArray())) { // Skip first 10 bytes and write the rest await _fixture.Store.AppendDataAsync(fileId, stream, CancellationToken.None); } checksumOk = await _fixture.Store.VerifyChecksumAsync(fileId, "sha1", Convert.FromBase64String(incorrectChecksum), CancellationToken.None); // Only first chunk should have been saved. checksumOk.ShouldBeFalse(); filePath = Path.Combine(_fixture.Path, fileId); new FileInfo(filePath).Length.ShouldBe(10); }