DateTime dt11 = new DateTime(1999, 11, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
DateTime dt12 = new DateTime(1999, 12, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
DateTime dt13 = new DateTime(1999, 13, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
DateTime dt01 = new DateTime(2000, 1, 2, 0, 0, 0, 0, ETHIOPIC_UTC);
DurationField fld = dt11.monthOfYear().getDurationField();
assertEquals(ETHIOPIC_UTC.months(), fld);
assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1, dt11.getMillis()));
assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2, dt11.getMillis()));
assertEquals((2L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(3, dt11.getMillis()));
assertEquals((3L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(4, dt11.getMillis()));
assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1));
assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2));
assertEquals(13L * 30L * MILLIS_PER_DAY, fld.getMillis(13));
assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1L, dt11.getMillis()));
assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2L, dt11.getMillis()));
assertEquals((2L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(3L, dt11.getMillis()));
assertEquals((3L * 30L + 6L) * MILLIS_PER_DAY, fld.getMillis(4L, dt11.getMillis()));
assertEquals(1L * 30L * MILLIS_PER_DAY, fld.getMillis(1L));
assertEquals(2L * 30L * MILLIS_PER_DAY, fld.getMillis(2L));
assertEquals(13L * 30L * MILLIS_PER_DAY, fld.getMillis(13L));
assertEquals(0, fld.getValue(1L * 30L * MILLIS_PER_DAY - 1L, dt11.getMillis()));
assertEquals(1, fld.getValue(1L * 30L * MILLIS_PER_DAY, dt11.getMillis()));
assertEquals(1, fld.getValue(1L * 30L * MILLIS_PER_DAY + 1L, dt11.getMillis()));
assertEquals(1, fld.getValue(2L * 30L * MILLIS_PER_DAY - 1L, dt11.getMillis()));
assertEquals(2, fld.getValue(2L * 30L * MILLIS_PER_DAY, dt11.getMillis()));
assertEquals(2, fld.getValue(2L * 30L * MILLIS_PER_DAY + 1L, dt11.getMillis()));
assertEquals(2, fld.getValue((2L * 30L + 6L) * MILLIS_PER_DAY - 1L, dt11.getMillis()));
assertEquals(3, fld.getValue((2L * 30L + 6L) * MILLIS_PER_DAY, dt11.getMillis()));
assertEquals(3, fld.getValue((2L * 30L + 6L) * MILLIS_PER_DAY + 1L, dt11.getMillis()));
assertEquals(3, fld.getValue((3L * 30L + 6L) * MILLIS_PER_DAY - 1L, dt11.getMillis()));
assertEquals(4, fld.getValue((3L * 30L + 6L) * MILLIS_PER_DAY, dt11.getMillis()));
assertEquals(4, fld.getValue((3L * 30L + 6L) * MILLIS_PER_DAY + 1L, dt11.getMillis()));
assertEquals(dt12.getMillis(), fld.add(dt11.getMillis(), 1));
assertEquals(dt13.getMillis(), fld.add(dt11.getMillis(), 2));
assertEquals(dt01.getMillis(), fld.add(dt11.getMillis(), 3));
assertEquals(dt12.getMillis(), fld.add(dt11.getMillis(), 1L));
assertEquals(dt13.getMillis(), fld.add(dt11.getMillis(), 2L));
assertEquals(dt01.getMillis(), fld.add(dt11.getMillis(), 3L));
}