### Question:
HelloWorldMapper extends AbstractOIDCProtocolMapper implements OIDCAccessTokenMapper, OIDCIDTokenMapper, UserInfoTokenMapper { @Override public String getDisplayType() { return "Hello World 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 shouldHaveDisplayType() { assertThat(new HelloWorldMapper().getDisplayType()).isNotBlank(); }