### Question:
HelloWorldMapper extends AbstractOIDCProtocolMapper implements OIDCAccessTokenMapper, OIDCIDTokenMapper, UserInfoTokenMapper { @Override public String getDisplayCategory() { return "Token mapper"; }  @Override String getDisplayCategory(); @Override String getDisplayType(); @Override String getHelpText(); @Override List<ProviderConfigProperty> getConfigProperties(); @Override String getId(); static final String PROVIDER_ID; }### Answer:
@Test public void shouldTokenMapperDisplayCategory() { final String tokenMapperDisplayCategory = new FullNameMapper().getDisplayCategory(); assertThat(new HelloWorldMapper().getDisplayCategory()).isEqualTo(tokenMapperDisplayCategory); }