public void TestWeightedMean()
{
List<SubjectDetailsViewModel> grades = new List<SubjectDetailsViewModel>();
var rnd = new Random();
var sum = 0.0;
var num = 0.0;
for (var i = 0; i < 5; i++)
{
var val = rnd.Next(2, 6);
var weight = rnd.Next(1, 10);
var grade = new SubjectDetailsViewModel()
{
grade_value = val,
grade_weight = weight
};
grades.Add(grade);
sum += grade.grade_weight * grade.grade_value;
num += grade.grade_weight;
}
var mean =Math.Round(sum/num, 2);
var calc = new AverageCalc();
var result = calc.WeightedAverage(grades.ToArray());
Assert.AreEqual(mean, result);
}
public void TestEmptyTableWeight()
{
var calc = new AverageCalc();
var emptyTable = new SubjectDetailsViewModel[1];
var result = calc.WeightedAverage(emptyTable);
}