public void GetFavouriteDelta_should_return_lowest_hash_when_candidate_scores_are_equal()
{
using (var realCache = new MemoryCache(new MemoryCacheOptions()))
{
_voter = new DeltaVoter(realCache, _producersProvider, _peerSettings, _logger);
var scoredCandidates = AddCandidatesToCacheAndVote(10, 110, realCache);
scoredCandidates.Select(c => c.Score).Distinct().Count().Should().Be(1);
scoredCandidates.Select(c => c.Candidate.Hash).Distinct().Count().Should().Be(2);
scoredCandidates.Select(c => c.Candidate.PreviousDeltaDfsHash).Distinct().Count().Should().Be(1);
var found = _voter.TryGetFavouriteDelta(
scoredCandidates.First().Candidate.PreviousDeltaDfsHash.ToByteArray().ToCid(),
out var favouriteCandidate);
found.Should().BeTrue();
var expectedFavourite = scoredCandidates
.OrderBy(c => c.Candidate.Hash.ToByteArray(), ByteUtil.ByteListMinSizeComparer.Default)
.First();
// ReSharper disable once ReturnValueOfPureMethodIsNotUsed
favouriteCandidate.Candidate.Hash.Equals(expectedFavourite.Candidate.Hash);
}
}
public void GetFavouriteDelta_should_return_null_on_unknown_previous_delta_hash()
{
using (var realCache = new MemoryCache(new MemoryCacheOptions()))
{
_voter = new DeltaVoter(realCache, _producersProvider, _peerSettings, _logger);
AddCandidatesToCacheAndVote(10, 500, realCache);
var found = _voter.TryGetFavouriteDelta(_hashProvider.ComputeMultiHash(ByteUtil.GenerateRandomByteArray(32)), out var favouriteCandidate);
found.Should().BeFalse();
favouriteCandidate.Should().BeNull();
}
}
public void GetFavouriteDelta_should_retrieve_favourite_delta()
{
using (var realCache = new MemoryCache(new MemoryCacheOptions()))
{
_voter = new DeltaVoter(realCache, _producersProvider, _peerSettings, _logger);
var scoredCandidates = AddCandidatesToCacheAndVote(10, 500, realCache);
scoredCandidates[1].Score.Should().BeGreaterThan(scoredCandidates[0].Score);
var previousDeltaHash = _hashProvider.Cast(scoredCandidates[0].Candidate.PreviousDeltaDfsHash.ToByteArray());
var found = _voter.TryGetFavouriteDelta(previousDeltaHash, out var favouriteCandidate);
found.Should().BeTrue();
favouriteCandidate.Candidate.PreviousDeltaDfsHash.ToByteArray().SequenceEqual(previousDeltaHash.ToArray()).Should().BeTrue();
favouriteCandidate.Candidate.Hash.ToByteArray().SequenceEqual(scoredCandidates[1].Candidate.Hash.ToByteArray()).Should().BeTrue();
favouriteCandidate.Candidate.ProducerId.Should().Be(scoredCandidates[1].Candidate.ProducerId);
}
}
