public async Task Happy_path(long headNumber, int options)
{
BlockDownloader.DownloadOptions downloadOptions = (BlockDownloader.DownloadOptions)options;
bool withReceipts = downloadOptions == BlockDownloader.DownloadOptions.DownloadWithReceipts;
InMemoryReceiptStorage inMemoryReceiptStorage = new InMemoryReceiptStorage();
BlockDownloader blockDownloader = new BlockDownloader(_blockTree, TestBlockValidator.AlwaysValid, TestSealValidator.AlwaysValid, NullSyncReport.Instance, inMemoryReceiptStorage, RopstenSpecProvider.Instance, LimboLogs.Instance);
ISyncPeer syncPeer = Substitute.For <ISyncPeer>();
Task <BlockHeader[]> buildHeadersResponse = null;
syncPeer.GetBlockHeaders(Arg.Any <long>(), Arg.Any <int>(), Arg.Any <int>(), Arg.Any <CancellationToken>())
.Returns(ci => buildHeadersResponse = _responseBuilder.BuildHeaderResponse(ci.ArgAt <long>(0), ci.ArgAt <int>(1), Response.AllCorrect));
Response blockResponseOptions = Response.AllCorrect;
if (withReceipts)
{
blockResponseOptions |= Response.WithTransactions;
}
Task <BlockBody[]> buildBlocksResponse = null;
syncPeer.GetBlocks(Arg.Any <IList <Keccak> >(), Arg.Any <CancellationToken>())
.Returns(ci => buildBlocksResponse = _responseBuilder.BuildBlocksResponse(ci.ArgAt <IList <Keccak> >(0), blockResponseOptions));
syncPeer.GetReceipts(Arg.Any <IList <Keccak> >(), Arg.Any <CancellationToken>())
.Returns(ci => _responseBuilder.BuildReceiptsResponse(buildHeadersResponse.Result, buildBlocksResponse.Result));
PeerInfo peerInfo = new PeerInfo(syncPeer);
peerInfo.TotalDifficulty = UInt256.MaxValue;
peerInfo.HeadNumber = headNumber;
await blockDownloader.DownloadHeaders(peerInfo, SyncModeSelector.FullSyncThreshold, CancellationToken.None);
Assert.AreEqual(Math.Max(0, headNumber - SyncModeSelector.FullSyncThreshold), _blockTree.BestSuggestedHeader.Number, "headers");
peerInfo.HeadNumber *= 2;
await blockDownloader.DownloadBlocks(peerInfo, 0, CancellationToken.None, downloadOptions);
_blockTree.BestSuggestedHeader.Number.Should().Be(Math.Max(0, headNumber * 2));
_blockTree.IsMainChain(_blockTree.BestSuggestedHeader.Hash).Should().Be(downloadOptions != BlockDownloader.DownloadOptions.DownloadAndProcess);
inMemoryReceiptStorage.Count.Should().Be(withReceipts ? buildBlocksResponse.Result.Sum(b => b.Transactions?.Length ?? 0) : 0);
}
