@Test
 public void testUserID() {
   GenericUserPreferenceArray prefs = new GenericUserPreferenceArray(3);
   assertEquals(3, prefs.length());
   prefs.setUserID(0, 1L);
   assertEquals(1L, prefs.getUserID(0));
   assertEquals(1L, prefs.getUserID(1));
   assertEquals(1L, prefs.getUserID(2));
 }
 @Test
 public void testSetValue() {
   GenericUserPreferenceArray prefs = new GenericUserPreferenceArray(3);
   assertEquals(3, prefs.length());
   prefs.setValue(0, 1.0f);
   prefs.setValue(1, 2.0f);
   prefs.setValue(2, 3.0f);
   assertEquals(1.0f, prefs.getValue(0), EPSILON);
   assertEquals(2.0f, prefs.getValue(1), EPSILON);
   assertEquals(3.0f, prefs.getValue(2), EPSILON);
 }