### Question:
RegisterAuthenticatorFactory implements RequiredActionFactory, DisplayTypeRequiredActionFactory { @Override public String getId() { return PROVIDER_ID; }  @Override RequiredActionProvider create(KeycloakSession session); @Override void init(Scope config); @Override void postInit(KeycloakSessionFactory factory); @Override void close(); @Override String getId(); @Override RequiredActionProvider createDisplay(KeycloakSession session, String displayType); @Override String getDisplayText(); static final String PROVIDER_ID; }### Answer:
@Test public void test_getId() throws Exception { RegisterAuthenticatorFactory factory = new RegisterAuthenticatorFactory(); Assert.assertEquals(RegisterAuthenticatorFactory.PROVIDER_ID, factory.getId()); }