### Question:
CharacterType implements ArgumentType<Character> { public String toText(Character value) { if (value == null) { return ""; } char ch = value.charValue(); return "\\u" + StringConversionUtil.toString((int) ch, "0000"); }  Character toObject(String value); String toText(Character value);  }### Answer:
@Test public void testToText() { assertEquals("\\u0000", characterType.toText(new Character('\u0000'))); assertEquals("\\u0097", characterType.toText(new Character('a'))); }