@Test
public void instantiation() {
ArrayBag<String> bagOfStrings = new ArrayBag<String>();
ArrayBag<Integer> bagOfIntegers = new ArrayBag<Integer>();
bagOfStrings.add("Thunder");
bagOfIntegers.add(42);
assertEquals(1, bagOfStrings.size());
assertEquals(1, bagOfIntegers.size());
}
@Test
public void testArrayBag() {
ArrayBag<Integer> bag = new ArrayBag<Integer>();
// a one-item bag
bag.add(1);
assertEquals(1, bag.size());
Iterator<Integer> it = bag.iterator();
assertTrue(it.hasNext());
int j = it.next();
assertEquals(1, j);
assertFalse(it.hasNext());
it.remove();
assertEquals(0, bag.size());
assertFalse(it.hasNext());
// a two-item bag
bag.add(1);
bag.add(2);
assertEquals(2, bag.size());
it = bag.iterator();
assertTrue(it.hasNext());
j = it.next();
assertEquals(1, j);
assertTrue(it.hasNext());
// test removal; this should not break iteration
it.remove();
assertEquals(1, bag.size());
assertTrue(it.hasNext());
j = it.next();
assertEquals(2, j);
assertFalse(it.hasNext());
bag = new ArrayBag<Integer>();
bag.add(1);
bag.add(2);
bag.add(3);
it = bag.iterator();
assertTrue(it.hasNext());
j = it.next();
j = it.next();
it.remove();
j = it.next();
assertEquals(3, j);
it.remove();
assertFalse(it.hasNext());
}