@Test
 public void test_returnCorrectFormattedGPA() {
   System.out.println("Test correct Formatted GPA is returned...");
   CourseEnrollment C = new CourseEnrollment("java", 4, "C");
   C.setGpa(3.2);
   assertTrue(CourseEnrollment.getFormattedGPA(C.getGpa()).equals("3.20"));
 }