@Test
public final void testRemoveOneElement() {
s.add(1);
assertTrue("remove for one element set returns false", s.remove(1));
assertTrue("isEmpty false for empty set after removal", s.isEmpty());
}
@Test
public final void testEmpty() {
assertTrue("isEmpty false for empty set", s.isEmpty());
s.add(1);
assertFalse("isEmpty true for non-empty set", s.isEmpty());
}
