public void CalculateClassResult_ZeroStudents_ShouldReturnValidClassResult()
{
// Arrange
var calculator = new ClassCalculator();
var @class = new Class("my empty class");
// Act
var result = calculator.CalculateClassResult(@class);
// Assert
Assert.AreEqual(0, result.Average);
Assert.AreEqual("my empty class", result.ClassName);
Assert.AreEqual(0, result.ExcludedStudentNames.Count);
Assert.AreEqual(0, result.TotalStudents);
Assert.AreEqual(0, result.StudentCountUsedForCalculations);
}
public void CalculateClassResult_VariedStudents_ShouldReturnValidAverage()
{
// Arrange
var calculator = new ClassCalculator();
var @class = new Class("my class");
@class.Students.Add(new Student("valid 1", 50));
@class.Students.Add(new Student("valid 2", 25));
@class.Students.Add(new Student("excluded 1", 0));
// Act
var result = calculator.CalculateClassResult(@class);
// Assert
Assert.AreEqual(37.5f, result.Average);
}
public void CalculateClassResult_OneStudent_ShouldReturnValidClassResult()
{
// Arrange
var calculator = new ClassCalculator();
var @class = new Class("my class");
@class.Students.Add(new Student("John Doe", 50));
// Act
var result = calculator.CalculateClassResult(@class);
// Assert
Assert.AreEqual(50, result.Average);
Assert.AreEqual("my class", result.ClassName);
Assert.AreEqual(0, result.ExcludedStudentNames.Count);
Assert.AreEqual(1, result.TotalStudents);
Assert.AreEqual(1, result.StudentCountUsedForCalculations);
}