public void DeltaHashProviderConstructor_Should_Apply_Capacity()
{
const int deltaCount = 9;
BuildDeltasAndSetCacheExpectations(deltaCount);
const int cacheCapacity = 3;
var deltaHashProvider = new DeltaHashProvider(_deltaCache, Substitute.For <IDeltaIndexService>(), _logger, cacheCapacity);
Enumerable.Range(1, deltaCount - 1).ToList().ForEach(i =>
{
var updated = deltaHashProvider.TryUpdateLatestHash(GetHash(i - 1), GetHash(i));
updated.Should().BeTrue();
});
deltaHashProvider.GetLatestDeltaHash().Should().Be(GetHash(deltaCount - 1));
var evictedCount = deltaCount - cacheCapacity;
var nonEvictedRange = Enumerable.Range(evictedCount, deltaCount - evictedCount);
nonEvictedRange.ToList().ForEach(i =>
{
deltaHashProvider.GetLatestDeltaHash(GetDateTimeForIndex(i))
.Should().Be(GetHash(i));
});
var evictedRange = Enumerable.Range(0, evictedCount);
evictedRange.ToList().ForEach(i =>
{
deltaHashProvider.GetLatestDeltaHash(GetDateTimeForIndex(i))
.Should().Be(default);
public void TryUpdateLatestHash_Should_Put_New_Hash_At_The_Top_Of_The_List()
{
const int deltaCount = 3;
BuildDeltasAndSetCacheExpectations(deltaCount);
var hashProvider = new DeltaHashProvider(_deltaCache, Substitute.For <IDeltaIndexService>(), _logger, 4);
var updated = hashProvider.TryUpdateLatestHash(GetHash(0), GetHash(1));
updated.Should().BeTrue();
updated = hashProvider.TryUpdateLatestHash(GetHash(1), GetHash(2));
updated.Should().BeTrue();
hashProvider.GetLatestDeltaHash()
.Should().Be(GetHash(2));
}
public void TryUpdateLatestHash_Should_Update_If_Hashes_Are_Valid()
{
const int deltaCount = 2;
BuildDeltasAndSetCacheExpectations(deltaCount);
var hashProvider = new DeltaHashProvider(_deltaCache, Substitute.For <IDeltaIndexService>(), _logger, 3);
var updated = hashProvider.TryUpdateLatestHash(GetHash(0), GetHash(1));
updated.Should().BeTrue();
hashProvider.GetLatestDeltaHash()
.Should().Be(GetHash(1));
}
public void TryUpdateLatestHash_Should_Push_New_Hash_On_Stream_When_Updating_Latest()
{
const int deltaCount = 2;
BuildDeltasAndSetCacheExpectations(deltaCount);
var observer = Substitute.For <IObserver <Cid> >();
var hashProvider = new DeltaHashProvider(_deltaCache, Substitute.For <IDeltaIndexService>(), _logger, 3);
using (hashProvider.DeltaHashUpdates.Subscribe(observer))
{
hashProvider.TryUpdateLatestHash(GetHash(0), GetHash(1));
observer.Received(1).OnNext(Arg.Is(GetHash(1)));
}
}