}

  public void testLowerCamelToLowerCamel() {
    assertEquals("foo", LOWER_CAMEL.to(LOWER_CAMEL, "foo"));
    assertEquals("fooBar", LOWER_CAMEL.to(LOWER_CAMEL, "fooBar"));
  }

  public void testLowerCamelToUpperCamel() {
    assertEquals("Foo", LOWER_CAMEL.to(UPPER_CAMEL, "foo"));
    assertEquals("FooBar", LOWER_CAMEL.to(UPPER_CAMEL, "fooBar"));

  }

  public void testLowerCamelToLowerCamel() {
    assertEquals("foo", LOWER_CAMEL.to(LOWER_CAMEL, "foo"));
    assertEquals("fooBar", LOWER_CAMEL.to(LOWER_CAMEL, "fooBar"));
  }

  public void testLowerCamelToUpperCamel() {
    assertEquals("Foo", LOWER_CAMEL.to(UPPER_CAMEL, "foo"));
    assertEquals("FooBar", LOWER_CAMEL.to(UPPER_CAMEL, "fooBar"));

  LOWER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {
    @Override
    String normalizeWord(String word) {
      return firstCharOnlyToUpper(word);
    }

    @Override
    String normalizeFirstWord(String word) {
      return Ascii.toLowerCase(word);
    }
  },

  /** Java and C++ class naming convention, e.g., "UpperCamel". */
  UPPER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {
    @Override

  LOWER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {
    @Override
    String normalizeWord(String word) {
      return firstCharOnlyToUpper(word);
    }

    @Override
    String normalizeFirstWord(String word) {
      return Ascii.toLowerCase(word);
    }
  },

  /** Java and C++ class naming convention, e.g., "UpperCamel". */
  UPPER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {
    @Override

        }
        String keyStr = key.toString();
        if (keyStr.indexOf('_') < 0) {
            keyStr = CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, StringUtils.uncapitalize(keyStr));
        } else {
            keyStr = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL, keyStr);
        }
        return keyStr;
    }

    @Override
    public int size() {
        return parent.size();
    }

    public boolean isPrettyPrintSuppressed() {
        return false;
    }

    @Override
    public JsonMappingOption provideMappingOption() {
        return new JsonMappingOption().asFieldNaming(JsonFieldNaming.CAMEL_TO_LOWER_SNAKE);
    }

        assertTrue(paramMap.containsKey("ccc.ddd"));
        assertFalse(paramMap.containsKey("cccDdd"));
        assertFalse(paramMap.containsKey("DccDdd"));
    }

    public void test_camel_get() {
        Map<Object, Object> paramMap = createCamelMap();

        assertNull(paramMap.get("xxx"));
        assertEquals("111", paramMap.get("aaa"));
        assertEquals("222", paramMap.get("aaa_bbb"));