public void AddRange_WhenTwoDifferentValueAdded_LastEmaValueIsTheAverage()
{
var target = new Ema(10);
target.AddRange(new[] { 0m, 10m });
target.Values.LastOrDefault().Should().BeApproximately((180m) / 99m, 0.000000001m);
target.Values.FirstOrDefault().Should().Be(0);
}
public void AddRange_OnlyTakesElementsInThePeriodForCalculation()
{
var target = new Ema(2);
target.AddRange(new[] { 0, 10m, 10m });
target.Values.LastOrDefault().Should().Be(80m / 9m);
target.Values.FirstOrDefault().Should().Be(0);
}
public void AddRange_OnlyStoresNbOfElementsDefinedInmaxBuffer()
{
var target = new Ema(2);
var elements = Enumerable.Range(1, 10000).Select(x => (decimal)x);
target.AddRange(elements);
target.Values.Count().Should().Be(5000);
}
public void AddRange_TestWithKnownValues_Succeed()
{
var target = new Ema(10);
var elements = (new[]
{
22.27, 22.19, 22.08, 22.17, 22.18, 22.13, 22.23, 22.43, 22.24, 22.29, 22.15, 22.39, 22.38, 22.61, 23.36, 24.05, 23.75, 23.83, 23.95,
23.63, 23.82, 23.87, 23.65, 23.19, 23.10, 23.33, 22.68, 23.10, 22.40, 22.17
}).Select(x => (decimal)x);
target.AddRange(elements);
target.Values.LastOrDefault().Should().BeApproximately(22.915536m, 0.000001m);
}