### Question:
HelloWorldMapper extends AbstractOIDCProtocolMapper implements OIDCAccessTokenMapper, OIDCIDTokenMapper, UserInfoTokenMapper { @Override public String getId() { return PROVIDER_ID; }  @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 shouldHaveIdId() { assertThat(new HelloWorldMapper().getId()).isNotBlank(); }