public void testSize() {
qi.incubate(a);
assertEquals(1, qi.size());
qi.incubate(b);
assertEquals(2, qi.size());
qi.hatch(b);
assertEquals(2, qi.size());
}
public void testClear() {
assertEquals(0, qi.size());
qi.incubate(a);
qi.clear();
assertEquals(0, qi.size());
}