public void testUnmodifiableIteratorShortCircuit() {
    Iterator<String> mod = Lists.newArrayList("a", "b", "c").iterator();
    UnmodifiableIterator<String> unmod = Iterators.unmodifiableIterator(mod);
    assertNotSame(mod, unmod);
    assertSame(unmod, Iterators.unmodifiableIterator(unmod));
    assertSame(unmod, Iterators.unmodifiableIterator((Iterator<String>) unmod));
  }

  @SuppressWarnings("deprecation")

  public void testBuilderForceCopy() {
    ImmutableList.Builder<Integer> builder = ImmutableList.builder();
    Object[] prevArray = null;
    for (int i = 0; i < 10; i++) {
      builder.add(i);
      assertNotSame(builder.contents, prevArray);
      prevArray = builder.contents;
      ImmutableList<Integer> unused = builder.build();
    }
  }

  @GwtIncompatible
  public void testBuilderExactlySizedReusesArray() {

    table.set(index, entry);
    segment.count++;

    assertSame(value, map.get(key, loader));
    assertEquals(0, loader.getCount());
    assertEquals(1, segment.count);

    entry.clearKey();
    assertNotSame(value, map.get(key, loader));
    assertEquals(1, loader.getCount());
    assertEquals(2, segment.count);
  }

  public void testComputePartiallyCollectedValue() throws ExecutionException {

    table.set(index, entry);
    segment.count++;

    assertSame(value, map.get(key, loader));
    assertEquals(0, loader.getCount());
    assertEquals(1, segment.count);

    entry.clearKey();
    assertNotSame(value, map.get(key, loader));
    assertEquals(1, loader.getCount());
    assertEquals(2, segment.count);
  }

  public void testComputePartiallyCollectedValue() throws ExecutionException {

    EnumMap<SomeEnum, Integer> original = Maps.newEnumMap(SomeEnum.class);
    EnumMap<SomeEnum, Integer> copy = Maps.newEnumMap(original);
    assertEquals(original, copy);
    assertNotSame(original, copy);
  }

  public void testEnumMapWithInitialMap() {
    HashMap<SomeEnum, Integer> original = Maps.newHashMap();
    original.put(SomeEnum.SOME_INSTANCE, 0);

    EnumMap<SomeEnum, Integer> original = Maps.newEnumMap(SomeEnum.class);
    EnumMap<SomeEnum, Integer> copy = Maps.newEnumMap(original);
    assertEquals(original, copy);
    assertNotSame(original, copy);
  }

  public void testEnumMapWithInitialMap() {
    HashMap<SomeEnum, Integer> original = Maps.newHashMap();
    original.put(SomeEnum.SOME_INSTANCE, 0);