public void GivenAStudenHasGradesThenTheCalculatorShouldCalculateAverageCorrectly()
{
var student1 = new Student()
{
Naam = "Bozo"
};
var student2 = new Student()
{
Naam = "Victor"
};
float expectedAverageStudent1 = (5f + 10f) / 2;
float expectedAverageStudent2 = (8f + 5f) / 2;
var gradeCollection = new GradeCollection();
gradeCollection.AddGrade(CreateGrade(student1, 5f));
gradeCollection.AddGrade(CreateGrade(student1, 10f));
gradeCollection.AddGrade(CreateGrade(student2, 8f));
gradeCollection.AddGrade(CreateGrade(student2, 5f));
var actualAverageStudent1 = AverageCalculator.CalculateMeanAverage(gradeCollection.GetGradesForStudent(student1));
var actualAverageStudent2 = AverageCalculator.CalculateMeanAverage(gradeCollection.GetGradesForStudent(student2));
Assert.AreEqual(expectedAverageStudent1, actualAverageStudent1, 0.001f);
Assert.AreEqual(expectedAverageStudent2, actualAverageStudent2, 0.002f);
}
private void OnGradeCollectionChanged()
{
lbGrades.Items.Clear();
foreach (var grade in m_gradeCollection.GetGradesForStudent(m_student))
{
string format = grade.Value.ToString("##.#");
lbGrades.Items.Add(format);
}
}
