Java 如何使用JUnit在Spring中测试ConfigurationProperties？

我有一个

ConfigurationProperties

类，希望使用

junit

对其进行测试。但是对象总是

null

。以下代码中可能缺少什么

@EnableAutoConfiguration
@ComponentScan
@EnableConfigurationProperties(MyProperties.class)
public class AppConfig {

}

@Service
public class MyService {
    @Autowired
    private MyProperties props;

    public void run() {
        props.getName();
    }
}

@Component
@ConfigurationProperties(prefix = "my")
public class MyProperties {
    private String name;
    //getter,setter
}

应用程序。属性：

my.name=test

@Configuration
@ComponentScan(basePackageClasses = {MyService.class,  MyProperties.class},
            includeFilters = @ComponentScan.Filter(value = {MyService.class,  MyProperties.class},
            type = FilterType.ASSIGNABLE_TYPE),
            lazyInit = true
)
@PropertySources(
        @PropertySource("application.properties")
    )
class AppTest {
    @Bean
    public static PropertySourcesPlaceholderConfigurer propertiesResolver() {
        return new PropertySourcesPlaceholderConfigurer();
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = ApplicationConfigTest.class)
public class MyTest extends AbstractJUnit4SpringContextTests {
    @Autowired
    private MyService service;

    @Test
    public void testService() {
        service.run();
    }
}

测试：

my.name=test

@Configuration
@ComponentScan(basePackageClasses = {MyService.class,  MyProperties.class},
            includeFilters = @ComponentScan.Filter(value = {MyService.class,  MyProperties.class},
            type = FilterType.ASSIGNABLE_TYPE),
            lazyInit = true
)
@PropertySources(
        @PropertySource("application.properties")
    )
class AppTest {
    @Bean
    public static PropertySourcesPlaceholderConfigurer propertiesResolver() {
        return new PropertySourcesPlaceholderConfigurer();
    }
}

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = ApplicationConfigTest.class)
public class MyTest extends AbstractJUnit4SpringContextTests {
    @Autowired
    private MyService service;

    @Test
    public void testService() {
        service.run();
    }
}

---

以下内容将为您加载它：

@ContextConfiguration(classes = Application.class, initializers = ConfigFileApplicationContextInitializer.class)

---

在当前的Spring启动版本中，不推荐使用

ConfigFileApplicationContextInitializer

，但在文档中，他们说我们应该使用

ConfigDataApplicationContextInitializer

。