如何触发JsonProcessingException for Java Unit Test？

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.4</version>
</dependency>

public class MyObject {
    private String name;
    private int age;

    // 省略构造方法和访问器方法
}

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

import org.junit.Test;

public class MyObjectTest {

    @Test(expected = JsonProcessingException.class)
    public void testJsonProcessingException() throws JsonProcessingException {
        MyObject myObject = new MyObject();
        ObjectMapper objectMapper = new ObjectMapper();
        String json = objectMapper.writeValueAsString(myObject);
    }
}