我正在尝试使用Spring Boot Test编写集成测试用例。
我自定义ConversionService
以了解新的java.time
类型:
@Configuration
public class ConversionServiceConfiguration {
@Bean
public static ConversionService conversionService() {
final FormattingConversionService reg = new DefaultFormattingConversionService();
new DateTimeFormatterRegistrar().registerFormatters(reg);
return reg;
}
}
然后期望它起作用:
@Component
class MyServiceConfig {
@Value("${max-watch-time:PT20s}")
private Duration maxWatchTime = Duration.ofSeconds(20);
}
在正常SpringApplication.run
下运行时,这似乎工作正常。但是,在我的测试用例中:
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT, classes= {
MyServiceMain.class,
AttachClientRule.class
})
public class MyTest {
@Inject
@Rule
public AttachClientRule client;
@Test(expected=IllegalArgumentException.class)
public void testBad() throws Exception {
client.doSomethingIllegal();
}
}
它爆炸了:
引起:org.springframework.beans.factory.UnsatisfiedDependencyException:创建名为'AttachClientRule'的bean时出错:通过构造函数参数0表示的不满意依赖:
创建名为'MyServiceConfig'的bean时出错:通过字段'maxWatchTime'表示的不满意:无法将[java.lang.String]类型的值转换为必需类型[java.time.Duration];
嵌套异常是java.lang.IllegalStateException:无法将类型[java.lang.String]的值转换为必需的类型[java.time.Duration]:找不到匹配的编辑器或转换策略;
深入了解进行实际转换的TypeConverterDelegate
的内容,它似乎捕获了ConversionService
上字段中使用的DefaultListableBeanFactory
。设置关于该字段设置位置的观察点,我找到了AbstractApplicationContext.refresh()
方法:
// Allows post-processing of the bean factory in context subclasses.
postProcessBeanFactory(beanFactory);
// Invoke factory processors registered as beans in the context.
invokeBeanFactoryPostProcessors(beanFactory);
// Register bean processors that intercept bean creation.
registerBeanPostProcessors(beanFactory);
// Initialize message source for this context.
initMessageSource();
// Initialize event multicaster for this context.
initApplicationEventMulticaster();
// Initialize other special beans in specific context subclasses.
onRefresh(); // <--- MyServiceConfig initialized here
// Check for listener beans and register them.
registerListeners();
// Instantiate all remaining (non-lazy-init) singletons.
finishBeanFactoryInitialization(beanFactory); // <--- DefaultListableBeanFactory.conversionService set here!!!
// Last step: publish corresponding event.
finishRefresh();
因此@Value
注入是在ConversionService
应用于BeanFactory
之前发生的。没有bueno!
我发现似乎是一种解决方法:
@Configuration
public class ConversionServiceConfiguration implements BeanFactoryPostProcessor {
@Bean
public static ConversionService conversionService() {
final FormattingConversionService reg = new DefaultFormattingConversionService();
new DateTimeFormatterRegistrar().registerFormatters(reg);
return reg;
}
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
beanFactory.setConversionService(conversionService());
}
}
这会强制初始化更早发生,但感觉不是正确的解决方案(至少它没有记录)。
我哪里出错了? Spring 4.3.0,Spring Boot 1.4.0M3
修改
现在我发现了另一种失败方式!没有使用相同的配置类实现EnvironmentAware
:
@Override
public void setEnvironment(Environment environment) {
((AbstractEnvironment) environment).setConversionService(conversionService());
}
我发现PropertySourcesPropertyResolver
使用了错误的(默认)ConversionService
。这让我很生气!
引起:java.lang.IllegalArgumentException:无法将值[PT15s]从源类型[String]转换为目标类型[Duration] 在org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:94) 在org.springframework.core.env.PropertySourcesPropertyResolver.getProperty(PropertySourcesPropertyResolver.java:65) 在org.springframework.core.env.AbstractPropertyResolver.getProperty(AbstractPropertyResolver.java:143) 在org.springframework.core.env.AbstractEnvironment.getProperty(AbstractEnvironment.java:546) 在com.mycorp.DoSomething.go(DoSomething.java:103)
答案 0 :(得分:1)
Spring Boot开发人员已经确认这个文档记录不清,并且无法按照规定运行:https://github.com/spring-projects/spring-boot/issues/6222
答案 1 :(得分:0)
尝试从static
bean定义中删除conversionService
关键字。