public void TestAggregateFunction()
{
AggregationMethod agg = new AggregatorStddev();
Assert.IsNull(agg.Value);
agg.Enter(10);
Assert.IsNull(agg.Value);
agg.Enter(8);
double result = agg.Value.AsDouble();
Assert.AreEqual("1.4142", result.ToString().Substring(0, 6));
agg.Enter(5);
result = agg.Value.AsDouble();
Assert.AreEqual("2.5166", result.ToString().Substring(0, 6));
agg.Enter(9);
result = agg.Value.AsDouble();
Assert.AreEqual("2.1602", result.ToString().Substring(0, 6));
agg.Leave(10);
result = agg.Value.AsDouble();
Assert.AreEqual("2.0816", result.ToString().Substring(0, 6));
}
public void TestAllOne()
{
AggregationMethod agg = new AggregatorStddev();
agg.Enter(1);
agg.Enter(1);
agg.Enter(1);
agg.Enter(1);
agg.Enter(1);
Assert.AreEqual(0.0d, agg.Value);
}