public void AddStudents_AddsAllStudents_ToTheCollection() { var schoolClass = new SchoolClass(); var students = new IStudent[6]; int id = 10000; for (int i = 0; i < students.Length; i++) { var student = this.CreateStudent(id + i); students[i] = student; } schoolClass.AddStudents(students); foreach (var student in students) { Assert.IsTrue(schoolClass.Students.Contains(student)); } }