public void test_Covariance_returns_correct_result()
{
/*Covariance for testList and testList2 calculated with R: -9.925833.
* For test result is rounded to four decimals.*/
Assert.AreEqual(Math.Round(-9.9258, 4), Math.Round(Variance.Covariance(testList, testList2), 4));
}
public void test_Covariance_null_lists_throws_MathError()
{
/*If either of Covariance parameter lists are null, MathError should be thrown
* with error "Parameter list cannot be a null item"*/
MathError err = Assert.Throws <MathError>(() => Variance.Covariance(testList, null));
Assert.AreEqual("Parameter list cannot be a null item", err.error);
}
public void test_Covariance_different_Counts_throw_MathError()
{
/*MathError with error message "Variable lists not the same length" should be thrown.*/
List <double> list1 = new List <double>();
list1.Add(2.2);
MathError err = Assert.Throws <MathError>(() => Variance.Covariance(testList, list1));
Assert.AreEqual("Variable lists not the same length", err.error);
}
public void test_Covariance_0_Count_lists_throws_MathError()
{
/*If both list are of 0 length, MathError should be thrown with error "Parameter lists have 0 items"*/
List <double> list1 = new List <double>();
List <double> list2 = new List <double>();
MathError err = Assert.Throws <MathError>(() => Variance.Covariance(list1, list2));
Assert.AreEqual("Parameter lists have 0 items", err.error);
list1 = null;
list2 = null;
}
