public void AddStudentsToCourse_AddsStudentsToSelectedCourse() { CourseModel courseModel = new CourseModel { Name = "Test Automation", StartDate = DateTime.Now.AddMonths(1), EndDate = DateTime.Now.AddYears(1), Students = new List <StudentModel>() }; StudentModel studentModel = new StudentModel { FirstName = "First", LastName = "Student" }; List <StudentModel> studentModelList = new List <StudentModel> { studentModel }; CourseService courseService = new CourseService(); courseService.AddStudentsToCourse(courseModel, studentModelList); var studentsInList = courseModel.Students.Any(student => student.FirstName == "First" && student.LastName == "Student"); Assert.IsTrue(studentsInList); }