assertTrue(name, domain.isUnderRegistrySuffix());
    }
  }

  public void testUnderRegistrySuffix() {
    for (String name : SOMEWHERE_UNDER_RS) {
      final InternetDomainName domain = InternetDomainName.from(name);
      assertFalse(name, domain.isRegistrySuffix());
      assertTrue(name, domain.hasRegistrySuffix());
      assertTrue(name, domain.isUnderRegistrySuffix());
    }
  }

   * www.google.com}, {@code foo.co.uk} and {@code blogspot.com}, but not for {@code com}, {@code
   * co.uk}, or {@code google.invalid}.
   *
   * @since 23.3
   */
  public boolean isUnderRegistrySuffix() {
    return registrySuffixIndex() > 0;
  }

  /**
   * Indicates whether this domain name is composed of exactly one subdomain component followed by a

   * www.google.com}, {@code foo.co.uk} and {@code blogspot.com}, but not for {@code com}, {@code
   * co.uk}, or {@code google.invalid}.
   *
   * @since 23.3
   */
  public boolean isUnderRegistrySuffix() {
    return registrySuffixIndex() > 0;
  }

  /**
   * Indicates whether this domain name is composed of exactly one subdomain component followed by a