### Question:
OzoneBlockTokenSecretManager extends
    OzoneSecretManager<OzoneBlockTokenIdentifier> { @Override public long renewToken(Token<OzoneBlockTokenIdentifier> token, String renewer) throws IOException { throw new UnsupportedOperationException("Renew token operation is not " + "supported for ozone block tokens."); } OzoneBlockTokenSecretManager(SecurityConfig conf,
      long blockTokenExpirytime, String omCertSerialId); @Override OzoneBlockTokenIdentifier createIdentifier(); OzoneBlockTokenIdentifier createIdentifier(String owner,
      String blockId, EnumSet<AccessModeProto> modes, long maxLength); Token<OzoneBlockTokenIdentifier> generateToken(String user,
      String blockId, EnumSet<AccessModeProto> modes, long maxLength); Token<OzoneBlockTokenIdentifier> generateToken(String blockId,
      EnumSet<AccessModeProto> modes, long maxLength); @Override byte[] retrievePassword(OzoneBlockTokenIdentifier identifier); @Override long renewToken(Token<OzoneBlockTokenIdentifier> token,
      String renewer); @Override OzoneBlockTokenIdentifier cancelToken(Token<OzoneBlockTokenIdentifier>
      token, String canceller); boolean validateToken(OzoneBlockTokenIdentifier identifier); boolean verifySignature(OzoneBlockTokenIdentifier identifier,
      byte[] password); @Override synchronized void start(CertificateClient client); @Override synchronized void stop();  }### Answer:
@Test public void testRenewToken() throws Exception { LambdaTestUtils.intercept(UnsupportedOperationException.class, "Renew token operation is not supported for ozone block" + " tokens.", () -> { secretManager.renewToken(null, null); }); }