public void TestUpdateGrade()
{
DbCourses dbCourses = new DbCourses();
dbCourses.Insert("Test Course", "Test Course");
DbStudents dbStudents = new DbStudents();
dbStudents.Insert("Test Student", "Test Student", "Test Student");
DbViewStudent dbViewStudent = new DbViewStudent();
dbViewStudent.Enrol("Test Student", "Test Course");
double actual = 5;
gradesController.Post("Test Student", "Test Course", actual);
ExpectedGrades expectedGrades = new ExpectedGrades();
double? expected = expectedGrades.GetGrade("Test Student", "Test Course").grade;
Assert.Equal(expected, actual);
dbViewStudent.Unenrol("Test Student", "Test Course");
dbCourses.Delete("Test Course");
dbStudents.Delete("Test Student", "Test Student", "Test Student");
}