POJO类是否需要独立单元测试？深入探讨与替代方案

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;

// 假设PersonalInfo也是一个简单的POJO
@Getter
@Setter
@ToString
@XmlAccessor(XmlAccessType.FIELD)
class PersonalInfo {
    @XmlElement(name = "Name")
    private String name;
    @XmlElement(name = "Age")
    private int age;
}

@Getter
@Setter
@ToString
@XmlAccessor(XmlAccessType.FIELD)
public class AdditionalAddress {
    @XmlElement(name = "PersonalInfo")
    private PersonalInfo personalInfo;
    @XmlElement(name = "AddressType")
    private String addressType;
}

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import java.io.StringReader;

public class XmlDataProcessor {

    /**
     * 模拟从XML字符串反序列化为AdditionalAddress对象
     * 在实际项目中，这会使用JAXBContext进行反序列化
     */
    public AdditionalAddress processXml(String xmlContent) throws JAXBException {
        // 实际应用中，JAXBContext的创建和Unmarshaller的获取可能通过依赖注入管理
        JAXBContext jaxbContext = JAXBContext.newInstance(AdditionalAddress.class, PersonalInfo.class);
        Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();

        StringReader reader = new StringReader(xmlContent);
        return (AdditionalAddress) jaxbUnmarshaller.unmarshal(reader);
    }
}

import org.junit.jupiter.api.Test;
import javax.xml.bind.JAXBException;
import static org.junit.jupiter.api.Assertions.*;

public class XmlDataProcessorTest {

    @Test
    void testProcessXml_validContent() throws JAXBException {
        XmlDataProcessor processor = new XmlDataProcessor();
        String xml = "<additionalAddress>" + // 根元素通常是类名的小写形式
                     "  <PersonalInfo>" +
                     "    <Name>John Doe</Name>" +
                     "    <Age>30</Age>" +
                     "  </PersonalInfo>" +
                     "  <AddressType>Home</AddressType>" +
                     "</additionalAddress>";

        AdditionalAddress result = processor.processXml(xml);

        assertNotNull(result);
        assertNotNull(result.getPersonalInfo());
        assertEquals("John Doe", result.getPersonalInfo().getName());
        assertEquals(30, result.getPersonalInfo().getAge());
        assertEquals("Home", result.getAddressType());
    }

    @Test
    void testProcessXml_missingAddressType() throws JAXBException {
        XmlDataProcessor processor = new XmlDataProcessor();
        String xml = "<additionalAddress>" +
                     "  <PersonalInfo>" +
                     "    <Name>Jane Doe</Name>" +
                     "    <Age>25</Age>" +
                     "  </PersonalInfo>" +
                     "</additionalAddress>"; // 缺少AddressType

        AdditionalAddress result = processor.processXml(xml);

        assertNotNull(result);
        assertNotNull(result.getPersonalInfo());
        assertEquals("Jane Doe", result.getPersonalInfo().getName());
        assertEquals(25, result.getPersonalInfo().getAge());
        assertNull(result.getAddressType()); // 验证缺失字段是否为null
    }

    @Test
    void testProcessXml_invalidXmlFormat() {
        XmlDataProcessor processor = new XmlDataProcessor();
        String invalidXml = "<invalidXml><data>test</data></invalidXml>";

        // 预期会抛出JAXBException，因为XML结构不匹配POJO
        assertThrows(JAXBException.class, () -> processor.processXml(invalidXml));
    }
}