@Test public void testToString() { System.out.println(manager.toString()); String expectNullValues = "Person [personID=0, CPR=null, fname=null," + " lname=null, country=null, ZIP=null, city=null, address=null," + " email=null, password=null]Staff [salary=0.0]Manager []"; assertEquals(expectNullValues, manager.toString()); }