@Test
public void testRemoveAmount() throws Exception {
ItemPack pack = new ItemPack(TestItem.test4, 4);
assertEquals(3, pack.removeAmount(3));
assertEquals(1, pack.getAmount());
assertEquals(1, pack.removeAmount(2));
assertEquals(0, pack.getAmount());
}
@Test
public void testAddAmount() throws Exception {
ItemPack pack = new ItemPack(TestItem.test4, 4);
assertEquals(0, pack.addAmount(2));
assertEquals(4, pack.getAmount());
ItemPack pack2 = new ItemPack(TestItem.test4, 2);
assertEquals(2, pack2.addAmount(2));
assertEquals(4, pack2.getAmount());
}