@Test
public void test_localized_string_to_json() throws Exception {
LocalizedString string = new LocalizedString().forLanguageTag(null, "coucou").forEn("kewkew");
String json = objectMapper.writeValueAsString(string);
log.debug(string.toString());
log.debug(json);
assertThat(string.keySet().contains(Locale.ENGLISH.toLanguageTag())).isTrue();
assertThat(string.keySet().contains(Locale.forLanguageTag("und").toLanguageTag())).isTrue();
LocalizedString string2 = objectMapper.readValue(json, LocalizedString.class);
log.debug(string2.toString());
assertThat(string2.keySet().contains(Locale.ENGLISH.toLanguageTag())).isTrue();
assertThat(string2.keySet().contains(Locale.forLanguageTag("und").toLanguageTag())).isTrue();
}