assertEquals("foo", UPPER_CAMEL.to(LOWER_CAMEL, "Foo"));
    assertEquals("fooBar", UPPER_CAMEL.to(LOWER_CAMEL, "FooBar"));
    assertEquals("hTTP", UPPER_CAMEL.to(LOWER_CAMEL, "HTTP"));
  }

  public void testUpperCamelToUpperCamel() {
    assertEquals("Foo", UPPER_CAMEL.to(UPPER_CAMEL, "Foo"));
    assertEquals("FooBar", UPPER_CAMEL.to(UPPER_CAMEL, "FooBar"));
  }

  public void testUpperCamelToUpperUnderscore() {

    }

    @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 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 normalizeWord(String word) {
      return firstCharOnlyToUpper(word);
    }
  },