/** 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)); }
/** 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)); }
/** * 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()); }