How to Improve Code Coverage with Lombok's @Data Annotation

How can I improve code coverage when using Lombok's @Data annotation in my unit tests?

When using Lombok's `@Data` annotation, unit test code coverage can be affected because the methods it generates (getters, setters, etc.) are often untested directly. Here are ways to improve code coverage in this scenario.

import lombok.Data;

@Data
public class User {
    private String name;
    private int age;
}

// Example test case to improve coverage
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;

public class UserTest {
    @Test
    public void testUserGettersSetters() {
        User user = new User();
        user.setName("John Doe");
        user.setAge(30);

        assertEquals("John Doe", user.getName());
        assertEquals(30, user.getAge());
    }
}

Causes

• Lombok generates methods at compile-time, which can complicate code coverage tools' ability to track them adequately.
• Common coverage tools may not recognize generated methods as executed, resulting in misleadingly low coverage reports.

Solutions

• Write explicit unit tests for the Lombok-generated methods to ensure they're executed and contribute to your coverage metrics.
• Consider isolating logic in methods that can be tested independently, rather than solely relying on the getters and setters.
• Configure your coverage tool (like Eclemma) to recognize generated code correctly, or use alternative libraries that provide better support for Lombok.

Mistake: Not covering the logic within methods relying solely on getters/setters for validation.

Solution: Always ensure to test the business logic in your methods apart from just testing getters/setters.

Mistake: Assuming code coverage tools would correctly report coverage without configuration.

Solution: Check and configure your test coverage tool for compatibility with Lombok annotations.