设置Spring单元测试的外部依赖

• 2019 年 12 月 2 日
• 筆記

单元测试中，有时候也依赖外部的组件，比如Redis-Mock。Spring Boot Test需要在上下文启动之前，先启动Redis-Mock，否则上下文会启动失败

依赖的外部组件

比如单元测试中依赖redis-mock，就必须在Spring上下文下载之前就先启动Redis Server，否则就会报下面的错误

io.netty.channel.AbstractChannel$AnnotatedConnectException:  Connection refused: no further information: localhost/127.0.0.1:6379

方法一：在每个Specification中配置RedisServer

@SpringBootTest  @ActiveProfiles("unittest")  @Transactional  class OrderManagerTest extends Specification {      private static RedisServer redisServer = null        def "setupSpec"() {          try {              redisServer = RedisServer.newRedisServer()              redisServer.start()              System.setProperty("spring.redis.port", Integer.toString(redisServer.getBindPort()))          } catch (IOException e) {              throw new RuntimeException(e)          }      }        def "cleanupSpec"() {          if (redisServer != null) {              redisServer.stop()          }      }  }

更好的方法

上面方法，需要在每个Specification都配置Redis Server，存在大量的冗余。其实可以利用BeanFactoryPostProcessor和ApplicationListener接口实现

import com.github.tenmao.redismock.RedisServer;  import org.springframework.beans.BeansException;  import org.springframework.beans.factory.config.BeanFactoryPostProcessor;  import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;  import org.springframework.context.ApplicationListener;  import org.springframework.context.event.ApplicationContextEvent;  import org.springframework.context.event.ContextClosedEvent;  import org.springframework.stereotype.Component;    import java.io.IOException;    @Component  public class UnittestCustomContext implements BeanFactoryPostProcessor, ApplicationListener<ApplicationContextEvent> {      private static RedisServer redisServer = null;        @Override      public void onApplicationEvent(ApplicationContextEvent event) {          if (event instanceof ContextClosedEvent) {              //Spring上下文结束后清理自定义上下文              System.out.println("tenmao unit test for event: " + event);              if (redisServer != null) {                  redisServer.stop();              }          }      }        @Override      public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {          try {              //Spring上下文初始化之前 配置自定义上下文，也可以修改Spring配置信息              redisServer = RedisServer.newRedisServer();              redisServer.start();              System.setProperty("spring.redis.port", Integer.toString(redisServer.getBindPort()));          } catch (IOException e) {              throw new RuntimeException(e);          }      }  }