### Question:
LocaleConverter implements Converter<Locale> { @Override public String toString(Locale locale) { return LocaleUtil.toLang(locale); }  @Override Locale fromString(String str); @Override Class<Locale> getJavaType(); @Override String toString(Locale locale);  }### Answer:
@Test public void ToStringLocale() { assertEquals("en", converter.toString(Locale.ENGLISH)); }