### Question:
HMapIL implements MapIL, Cloneable, Serializable { @Override public void increment(int key) { if (this.containsKey(key)) { this.put(key, (long) (this.get(key) + 1)); } else { this.put(key, (long) 1); } } HMapIL(int initialCapacity, float loadFactor);  HMapIL(int initialCapacity);  HMapIL();  HMapIL(MapIL m); @Override int size(); @Override boolean isEmpty(); @Override long get(int key); @Override boolean containsKey(int key); @Override long put(int key, long value); @Override void putAll(MapIL m); @Override long remove(int key); @Override void clear(); @Override boolean containsValue(long value); @Override Object clone(); @Override Set<Integer> keySet(); @Override Collection<Long> values(); @Override Set<MapIL.Entry> entrySet(); @Override String toString(); @Override void plus(MapIL m); @Override long dot(MapIL m); @Override void increment(int key); @Override void increment(int key, long value); MapIL.Entry[] getEntriesSortedByValue(); MapIL.Entry[] getEntriesSortedByValue(int n);  }### Answer:
@Test public void testIncrement() { HMapIL m = new HMapIL(); assertEquals(0L, m.get(1)); m.increment(1, 1L); assertEquals(1L, m.get(1)); m.increment(1, 1L); m.increment(2, 0L); m.increment(3, -1L); assertEquals(2L, m.get(1)); assertEquals(0L, m.get(2)); assertEquals(-1L, m.get(3)); m.increment(Integer.MAX_VALUE, Integer.MAX_VALUE); assertEquals((long) Integer.MAX_VALUE, m.get(Integer.MAX_VALUE)); m.increment(Integer.MAX_VALUE); assertEquals(1L + Integer.MAX_VALUE, m.get(Integer.MAX_VALUE)); }