### Question:
DiskBackedList2 implements List<K> { @Override public Iterator<K> iterator() { return listIterator(); } DiskBackedList2(ItemCodec<K> codec);  DiskBackedList2(ItemCodec<K> codec, long maxChunkSizeBytes, File directory); void setCodec(ItemCodec<K> codec); String toString(); @Override boolean add(K element); @Override /** * This function adds an element to a particular location. * TODO does not presently respect maxChunkSize */ void add(int elementIndex, K element); @Override boolean addAll(Collection<? extends K> c); @Override boolean addAll(int index, Collection<? extends K> c); @Override void clear(); @Override boolean contains(Object o); @Override boolean containsAll(Collection<?> c); @Override K get(int elementIndex); @Override int indexOf(Object o); @Override boolean isEmpty(); @Override Iterator<K> iterator(); @Override int lastIndexOf(Object o); @Override ListIterator<K> listIterator(); @Override ListIterator<K> listIterator(final int ind); @Override boolean remove(Object o); @Override K remove(int elementIndex); @Override boolean removeAll(Collection<?> c); @Override boolean retainAll(Collection<?> c); @Override K set(int elementIndex, K element); @Override int size(); @Override List<K> subList(int fromIndex, int toIndex); @Override Object[] toArray(); @Override T[] toArray(T[] a); void close(); void sort(final Comparator<? super K> comp); void addEncodedData(Iterator<byte[]> stream); Iterator<byte[]> getEncodedData(); void loadAllChunksFromDirectory(); void saveAllChunksToDirectory(); File getDirectory();  }### Answer:
@Test public void iteratorTest() throws IOException { DiskBackedList2<TestValue> dbl = new DiskBackedList2<>(codec); try { int numEntries = 10000; for (int i = 0; i < numEntries; i++) { dbl.add(new TestValue(i)); } Iterator<TestValue> listIter = dbl.listIterator(); for (int i = 0; i < numEntries; i++) { Assert.assertEquals(new TestValue(i), listIter.next()); } Assert.assertEquals(false, listIter.hasNext()); dbl.clear(); } finally { if (dbl != null) { LessFiles.deleteDir(dbl.getDirectory()); } } }