Mockito mockingDetails Method

The mockingDetails method in the Mockito framework is used to inspect a particular object for Mockito-related information. This can help you understand whether an object is a mock, spy, or neither, and provides details about the interactions and stubbing associated with the mock.

Table of Contents

1. Introduction
2. mockingDetails Method Syntax
3. Examples
   • Basic Usage
   • Inspecting a Spy
4. Real-World Use Case
5. Conclusion

Introduction

Mockito is a popular library in Java for creating and managing mock objects. The mockingDetails method, which belongs to the Mockito class, allows you to retrieve a MockingDetails instance for a given object. This instance provides various details about the mock, such as whether it is a mock or a spy, and information about the interactions and stubbing associated with it.

mockingDetails Method Syntax

Inspecting an Object for Mockito-Related Information

import org.mockito.MockingDetails;
import static org.mockito.Mockito.mockingDetails;

static MockingDetails mockingDetails(Object toInspect)

Returns a MockingDetails instance that enables inspecting a particular object for Mockito-related information.

Parameters:

• toInspect: The object to be inspected.

Returns:

• A MockingDetails instance that provides details about the mock or spy.

Examples

Basic Usage

Inspect a mock object to get Mockito-related information.

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.mockingDetails;
import org.mockito.MockingDetails;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

public class BasicMockingDetailsTest {
    @Test
    void testMockingDetails() {
        UserService mockUserService = mock(UserService.class);

        MockingDetails details = mockingDetails(mockUserService);

        assertTrue(details.isMock());
        assertFalse(details.isSpy());
    }
}

class UserService {
    public void deleteUser(String userId) {
        // Method implementation
    }
}

Inspecting a Spy

Inspect a spy object to get Mockito-related information.

import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.mockingDetails;
import org.mockito.MockingDetails;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

public class SpyMockingDetailsTest {
    @Test
    void testSpyMockingDetails() {
        UserService realUserService = new UserService();
        UserService spyUserService = spy(realUserService);

        MockingDetails details = mockingDetails(spyUserService);

        assertTrue(details.isSpy());
        assertFalse(details.isMock());
    }
}

class UserService {
    public void deleteUser(String userId) {
        // Method implementation
    }
}

Real-World Use Case

Verifying Object Types in Complex Tests

In a real-world scenario, you might have complex tests involving multiple objects where you need to verify whether an object is a mock or a spy. This can help ensure that your test setup is correct and that you are working with the expected types of objects.

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.mockingDetails;
import org.mockito.MockingDetails;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

interface PaymentService {
    void processPayment(String orderId);
}

class PaymentServiceImpl implements PaymentService {
    public void processPayment(String orderId) {
        // Real implementation
    }
}

class OrderService {
    private final PaymentService paymentService;

    public OrderService(PaymentService paymentService) {
        this.paymentService = paymentService;
    }

    public void placeOrder(String orderId) {
        paymentService.processPayment(orderId);
    }
}

public class OrderServiceTest {
    @Test
    void testOrderServiceInteractions() {
        PaymentService mockPaymentService = mock(PaymentService.class);
        OrderService orderService = new OrderService(mockPaymentService);

        MockingDetails paymentServiceDetails = mockingDetails(mockPaymentService);

        assertTrue(paymentServiceDetails.isMock());
        assertFalse(paymentServiceDetails.isSpy());

        PaymentServiceImpl realPaymentService = new PaymentServiceImpl();
        PaymentService spyPaymentService = spy(realPaymentService);

        MockingDetails spyPaymentServiceDetails = mockingDetails(spyPaymentService);

        assertTrue(spyPaymentServiceDetails.isSpy());
        assertFalse(spyPaymentServiceDetails.isMock());
    }
}

In this example, the OrderServiceTest class uses Mockito’s mockingDetails method to inspect both mock and spy objects. This helps ensure that the OrderService methods are interacting with the correct types of objects and that the test setup is correct.

Conclusion

The mockingDetails method in Mockito is used for inspecting objects to retrieve Mockito-related information. By using mockingDetails, you can determine whether an object is a mock or a spy and gain insights into the interactions and stubbing associated with the mock. This helps ensure that your tests are accurate and comprehensive, allowing you to validate both real and mocked behavior.