public void testRemove() {
final RevFlag flag1 = rw.newFlag("flag_1");
final RevFlag flag2 = rw.newFlag("flag_2");
final RevFlagSet set = new RevFlagSet();
assertTrue(set.add(flag1));
assertTrue(set.add(flag2));
assertTrue(set.remove(flag1));
assertFalse(set.remove(flag1));
assertEquals(flag2.mask, set.mask);
assertFalse(set.contains(flag1));
}