@Test
public void add() {
assertEquals(HardSoftScore.of(19, -320),
HardSoftScore.of(20, -20).add(
HardSoftScore.of(-1, -300)));
assertEquals(HardSoftScore.ofUninitialized(-77, 19, -320),
HardSoftScore.ofUninitialized(-70, 20, -20).add(
HardSoftScore.ofUninitialized(-7, -1, -300)));
}