### Question:
DomainNameIdentityProviderExtractor implements IdentityProviderExtractor { @Override public String getIdentityProviderName(HttpServletRequest request) { return getIdentityProviderSegment(getDomainSegments(request)); }  @Override boolean hasIdentityProvider(HttpServletRequest request); @Override String getIdentityProviderName(HttpServletRequest request); @Override String getRedirectUri(HttpServletRequest request); OidcConfiguration getOidcConfiguration(); void setOidcConfiguration(OidcConfiguration oidcConfiguration); static final int DEFAULT_NUMBER_OF_SIGNIFICANT_DOMAIN_LEVELS; }### Answer:
@Test public void testGetIdentityProvider(){ DomainNameIdentityProviderExtractor extractor = new DomainNameIdentityProviderExtractor(); assertEquals("redhat", extractor.getIdentityProviderName(requestWithUrl("https: assertEquals("redhat", extractor.getIdentityProviderName(requestWithUrl("https: assertEquals("redhat", extractor.getIdentityProviderName(requestWithUrl("https: }