public void processPayment(ConsumerPaymentRequest consumerPaymentRequest) throws PaymentServiceException, IOException { String userId = consumerPaymentRequest.getIdentity().getUserId(); log.info("Consumer Payment validation: {}", consumerPaymentRequest); PaymentRequest paymentRequest = populatePaymentRequest(consumerPaymentRequest); log.info("Payment Request JSON ::" + gson.toJson(paymentRequest)); //validate(consumerPaymentRequest); Write junit test case using junit5 and mockito

import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

import java.io.IOException;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class PaymentServiceTest {

    private static final Logger log = LoggerFactory.getLogger(PaymentServiceTest.class);
    private static final Gson gson = new Gson();
    private static final PaymentService paymentService = new PaymentService();

    @Test
    public void testProcessPayment() throws PaymentServiceException, IOException {
        ConsumerPaymentRequest consumerPaymentRequest = new ConsumerPaymentRequest();
        consumerPaymentRequest.setUserId("123");
        consumerPaymentRequest.setPaymentType("DEBIT_CARD");
        consumerPaymentRequest.setPaymentAmount(BigDecimal.valueOf(10));
        consumerPaymentRequest.setMerchantId("merchant-1");
        consumerPaymentRequest.setMerchantSecret("merchant-secret-1");


        Payment