public void CalculateExponentialMovingAverageFromBasicPriceHistory()
{
int searchId = 2, conditionId = 2;
var mockRepository = CreateBasicMockRepository(searchId, conditionId);
var sut = new PriceHistoryService(mockRepository) as IPriceHistoryService;
var results = sut.CreateBasicPriceHistory(searchId, conditionId);
sut.AddExponentialMovingAverage(results, 5);
var emas = results.Select(ph => ph.EMA.HasValue ? Math.Round(ph.EMA.Value, 8) : ph.EMA);
// Test results
emas.AssertSequenceIsEqual(null, null, null, null, 12.694, 12.976, 12.64733333, 12.60822222, 12.66548148,
13.36365432, 13.57243621, 13.74495748, 14.01663832, 14.34442554, 13.3262837, 13.21752246);
}
public void CalculateExponentialMovingAverageWhenIntervalBiggerThanNumberOfPricesDoesntSetEMAs()
{
var mockRepository = A.Fake<ISoldOutRepository>();
A.CallTo(() => mockRepository.GetSearchResultsByProductID(A<int>.Ignored, A<int>.Ignored, A<bool>.Ignored)).Returns(CreateListOfTwoSearchResults());
var sut = new PriceHistoryService(mockRepository) as IPriceHistoryService;
var results = sut.CreateBasicPriceHistory(1, 2);
sut.AddExponentialMovingAverage(results, 5);
foreach (var result in results)
Assert.IsNull(result.EMA);
}
public void CalculateExponentialMovingAverageWhenIntervalEqualsNumberOfPrices()
{
var mockRepository = A.Fake<ISoldOutRepository>();
A.CallTo(() => mockRepository.GetSearchResultsByProductID(A<int>.Ignored, A<int>.Ignored, A<bool>.Ignored)).Returns(CreateTestSearchResults().Take(5));
var sut = new PriceHistoryService(mockRepository) as IPriceHistoryService;
var results = sut.CreateBasicPriceHistory(1, 2);
sut.AddExponentialMovingAverage(results, 5);
Assert.AreEqual(Math.Round(results[4].EMA.Value, 3), 12.694);
}