/** Ensures that the bag contains the default value by default */
@Test
public void testDefault() {
IntBag bag = new IntBag();
assertEquals(0, bag.get(0));
bag.set(0, 1);
assertEquals(0, bag.get(1));
assertEquals(0, bag.get(2));
assertEquals(0, bag.get(3));
}
/**
* Ensures that the bag resizes correctly when out of capacity, that it does not resize when
* queried for non-existing elements, and that it does not resize when the default value is set.
*/
@Test
public void testCapacity() {
IntBag bag;
bag = new IntBag();
assertEquals(0, bag.getCapacity());
bag.set(0, 1);
assertEquals(1, bag.getCapacity());
bag.set(1, 2);
assertEquals(2, bag.getCapacity());
bag.set(2, 3);
assertEquals(4, bag.getCapacity());
bag.set(3, 4);
assertEquals(4, bag.getCapacity());
bag.set(4, 5);
assertEquals(8, bag.getCapacity());
bag.set(8, 6);
assertEquals(16, bag.getCapacity());
bag.set(35, 7);
assertEquals(64, bag.getCapacity());
bag = new IntBag();
for (int i = 0; i < 32; i++) {
bag.get((1 << i) - 1);
assertEquals(0, bag.getCapacity());
}
bag.get(Integer.MAX_VALUE);
assertEquals(0, bag.getCapacity());
bag = new IntBag();
for (int i = 0; i < 31; i++) {
bag.set((1 << i) - 1, 0);
assertEquals(0, bag.getCapacity());
}
bag.set(Integer.MAX_VALUE, 0);
assertEquals(0, bag.getCapacity());
}
/** When a negative index is used, an {@link ArrayIndexOutOfBoundsException} should be thrown. */
@Test
public void testArrayIndexOutOfBoundsException() {
IntBag bag = new IntBag();
for (int i = 0; i < 32; i++) {
try {
bag.set(-(1 << i), 0);
} catch (ArrayIndexOutOfBoundsException ex) {
continue;
}
fail("ArrayIndexOutOfBoundsException expected for index " + (-(1 << i)));
}
for (int i = 0; i < 32; i++) {
try {
bag.get(-(1 << i));
} catch (ArrayIndexOutOfBoundsException ex) {
continue;
}
fail("ArrayIndexOutOfBoundsException expected for index " + (-(1 << i)));
}
}
/** Ensures that the elements of a bag are actually stored */
@Test
public void testStorage() {
IntBag bag = new IntBag();
bag.set(0, 0);
assertEquals(0, bag.get(0));
assertEquals(0, bag.get(1));
assertEquals(0, bag.get(2));
assertEquals(0, bag.get(3));
assertEquals(0, bag.get(4));
assertEquals(0, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(1, 1);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(0, bag.get(2));
assertEquals(0, bag.get(3));
assertEquals(0, bag.get(4));
assertEquals(0, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(2, 2);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(2, bag.get(2));
assertEquals(0, bag.get(3));
assertEquals(0, bag.get(4));
assertEquals(0, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(3, 3);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(2, bag.get(2));
assertEquals(3, bag.get(3));
assertEquals(0, bag.get(4));
assertEquals(0, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(4, 4);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(2, bag.get(2));
assertEquals(3, bag.get(3));
assertEquals(4, bag.get(4));
assertEquals(0, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(5, 5);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(2, bag.get(2));
assertEquals(3, bag.get(3));
assertEquals(4, bag.get(4));
assertEquals(5, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(6, 6);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(2, bag.get(2));
assertEquals(3, bag.get(3));
assertEquals(4, bag.get(4));
assertEquals(5, bag.get(5));
assertEquals(6, bag.get(6));
assertEquals(0, bag.get(7));
bag.set(7, 7);
assertEquals(0, bag.get(0));
assertEquals(1, bag.get(1));
assertEquals(2, bag.get(2));
assertEquals(3, bag.get(3));
assertEquals(4, bag.get(4));
assertEquals(5, bag.get(5));
assertEquals(6, bag.get(6));
assertEquals(7, bag.get(7));
bag.clear();
assertEquals(0, bag.get(0));
assertEquals(0, bag.get(1));
assertEquals(0, bag.get(2));
assertEquals(0, bag.get(3));
assertEquals(0, bag.get(4));
assertEquals(0, bag.get(5));
assertEquals(0, bag.get(6));
assertEquals(0, bag.get(7));
}