public void test_BetaEstimate_returns_correct_result()
{
/*B1-coefficient for linear model where testList is the response variable and testList2
* is the explanatory variable lm(testList ~ testList2) is -0.2259 (Calculated with R).
* That means that for every unit testList2 value is elevated, testList value declines by
* -0,2259. Result rounded to 4 decimals in the test*/
Assert.AreEqual(-0.2259, Math.Round(Regression.BetaEstimate(testList, testList2), 4));
}
public void test_BetaEstimate_null_list_throws_MathError()
{
/*If either of parameter lists are null, MathError should be thrown
* with error "Parameter list cannot be a null item"*/
MathError err = Assert.Throws <MathError>(() => Regression.BetaEstimate(testList, null));
Assert.AreEqual("Parameter list cannot be a null item", err.error);
}
public void test_BetaEstimate_different_Counts()
{
/*MathError with error message "Variable lists not the same length" should be thrown.
* Since only one list is of length 0 this should produce different lengths error */
List <double> list1 = new List <double>();
MathError err = Assert.Throws <MathError>(() => Regression.BetaEstimate(testList, list1));
Assert.AreEqual("Variable lists not the same length", err.error);
}
public void test_BetaEstimate_0_Count_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>(() => Regression.BetaEstimate(list1, list2));
Assert.AreEqual("Parameter lists have 0 items", err.error);
list1 = null;
list2 = null;
}