private List <IScoredCandidateDelta> AddCandidatesToCacheAndVote(int firstVotesCount,
int secondVotesCount,
MemoryCache realCache)
{
var firstCandidate = DeltaHelper.GetCandidateDelta(_hashProvider, _previousDeltaHash,
producerId: _producerIds.First());
var secondCandidate = DeltaHelper.GetCandidateDelta(_hashProvider, _previousDeltaHash,
producerId: _producerIds.Skip(1).First());
var candidateStream = Enumerable.Repeat(firstCandidate, firstVotesCount)
.Concat(Enumerable.Repeat(secondCandidate, secondVotesCount))
.Shuffle().ToObservable();
using (candidateStream.Subscribe(_voter))
{
var firstKey = DeltaVoter.GetCandidateCacheKey(firstCandidate);
var secondKey = DeltaVoter.GetCandidateCacheKey(secondCandidate);
realCache.TryGetValue(firstKey, out IScoredCandidateDelta firstRetrieved).Should().BeTrue();
realCache.TryGetValue(secondKey, out IScoredCandidateDelta secondRetrieved).Should().BeTrue();
return(new List <IScoredCandidateDelta>
{
firstRetrieved, secondRetrieved
});
}
}
public void When_candidates_not_in_cache_should_create_or_update_a_previous_hash_entry()
{
using (var realCache = new MemoryCache(new MemoryCacheOptions()))
{
_voter = new DeltaVoter(realCache, _producersProvider, _peerSettings, _logger);
var candidate1 = DeltaHelper.GetCandidateDelta(
_hashProvider,
_previousDeltaHash,
producerId: _producerIds.First());
var candidate1CacheKey = DeltaVoter.GetCandidateCacheKey(candidate1);
var candidate2 = DeltaHelper.GetCandidateDelta(
_hashProvider,
_previousDeltaHash,
producerId: _producerIds.Last());
var candidate2CacheKey = DeltaVoter.GetCandidateCacheKey(candidate2);
var previousDeltaCacheKey = DeltaVoter.GetCandidateListCacheKey(candidate1);
_voter.OnNext(candidate1);
realCache.TryGetValue(candidate1CacheKey,
out ScoredCandidateDelta retrievedCandidate1).Should().BeTrue();
retrievedCandidate1.Candidate.ProducerId.Should().Be(_producerIds.First());
realCache.TryGetValue(previousDeltaCacheKey,
out ConcurrentBag <string> retrievedCandidateList).Should().BeTrue();
retrievedCandidateList.Should().BeEquivalentTo(candidate1CacheKey);
_voter.OnNext(candidate2);
realCache.TryGetValue(candidate2CacheKey,
out ScoredCandidateDelta retrievedCandidate2).Should().BeTrue();
retrievedCandidate2.Candidate.ProducerId.Should().Be(_producerIds.Last());
realCache.TryGetValue(previousDeltaCacheKey,
out ConcurrentBag <string> retrievedUpdatedCandidateList).Should().BeTrue();
retrievedUpdatedCandidateList.Should().BeEquivalentTo(candidate1CacheKey, candidate2CacheKey);
}
}