final Map<String, Object> map = newHashMap();
        BeanUtil.copyBeanToMap(bean2, map, converter(new NumberConverter("#,##0")));
        assertThat(map.get("aaa"), is((Object) "1,000"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testCopyMapToBean_converter() throws Exception {
        final Map<String, Object> map = newHashMap();
        map.put("aaa", new Integer(1000));

  public void testComposition() {
    Map<String, Integer> mJapaneseToInteger = Maps.newHashMap();
    mJapaneseToInteger.put("Ichi", 1);
    mJapaneseToInteger.put("Ni", 2);
    mJapaneseToInteger.put("San", 3);
    Function<String, Integer> japaneseToInteger = Functions.forMap(mJapaneseToInteger);

    Map<Integer, String> mIntegerToSpanish = Maps.newHashMap();
    mIntegerToSpanish.put(1, "Uno");
    mIntegerToSpanish.put(3, "Tres");

  public void testComposition() {
    Map<String, Integer> mJapaneseToInteger = Maps.newHashMap();
    mJapaneseToInteger.put("Ichi", 1);
    mJapaneseToInteger.put("Ni", 2);
    mJapaneseToInteger.put("San", 3);
    Function<String, Integer> japaneseToInteger = Functions.forMap(mJapaneseToInteger);

    Map<Integer, String> mIntegerToSpanish = Maps.newHashMap();
    mIntegerToSpanish.put(1, "Uno");
    mIntegerToSpanish.put(3, "Tres");

    Map<String, Integer> underlying = Maps.newHashMap();
    underlying.put("a", 1);
    Map<String, String> map = Maps.transformValues(underlying, Functions.toStringFunction());
    assertEquals("1", map.remove("a"));
    assertNull(map.remove("b"));
  }

  public void testTransformEqualityOfMapsWithNullValues() {
    Map<String, @Nullable String> underlying = Maps.newHashMap();
    underlying.put("a", null);

  protected Map<String, String> makeEmptyMap() {
    Map<String, Integer> underlying = Maps.newHashMap();
    return Maps.transformValues(
        new UnmodifiableIteratorMap<String, Integer>(underlying), Functions.toStringFunction());
  }

  @Override
  protected Map<String, String> makePopulatedMap() {
    Map<String, Integer> underlying = Maps.newHashMap();
    underlying.put("a", 1);
    underlying.put("b", 2);

  protected Map<String, String> makeEmptyMap() {
    Map<String, Integer> underlying = Maps.newHashMap();
    return Maps.transformValues(
        new UnmodifiableIteratorMap<String, Integer>(underlying), Functions.toStringFunction());
  }

  @Override
  protected Map<String, String> makePopulatedMap() {
    Map<String, Integer> underlying = Maps.newHashMap();
    underlying.put("a", 1);
    underlying.put("b", 2);

    Map<String, Integer> underlying = Maps.newHashMap();
    underlying.put("a", 1);
    Map<String, String> map = Maps.transformValues(underlying, Functions.toStringFunction());
    assertEquals("1", map.remove("a"));
    assertNull(map.remove("b"));
  }

  public void testTransformEqualityOfMapsWithNullValues() {
    Map<String, @Nullable String> underlying = Maps.newHashMap();
    underlying.put("a", null);

  @Override
  protected Map<String, String> makeEmptyMap() {
    return Maps.transformValues(Maps.<String, String>newHashMap(), Functions.<String>identity());
  }

  @Override
  protected Map<String, String> makePopulatedMap() {
    Map<String, Integer> underlying = Maps.newHashMap();
    underlying.put("a", 1);
    underlying.put("b", 2);
    underlying.put("c", 3);

  }

  @Override
  protected Map<String, Collection<Integer>> makeEmptyMap() {
    Map<String, Integer> map = Maps.newHashMap();
    return Multimaps.forMap(map).asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    Map<String, Integer> map = Maps.newHashMap();
    map.put("foo", 1);
    map.put("bar", 2);
    map.put("cow", 3);
    return Multimaps.forMap(map).asMap();
  }

  }

  @Override
  protected Map<String, Collection<Integer>> makeEmptyMap() {
    Map<String, Integer> map = Maps.newHashMap();
    return Multimaps.forMap(map).asMap();
  }

  @Override
  protected Map<String, Collection<Integer>> makePopulatedMap() {
    Map<String, Integer> map = Maps.newHashMap();
    map.put("foo", 1);
    map.put("bar", 2);
    map.put("cow", 3);
    return Multimaps.forMap(map).asMap();
  }