如何测试WebServerInitialized事件

Question

我正在尝试测试应用程序在服务注册中心注册时出现的功能。这只会发生在应用程序有一个完整的网络上下文(即。spring-boot-starter-web在类路径上，servlet没有被模拟)。这是通过spring-cloud-commons AbstractAutoServiceRegistration控制的。

简单测试

所有测试应该做的是以下几点：

1) Bring up Web App
2) Verify auto-registration w/ service registry event fired
3) Manually force close app
4) Verify auto-deregistratoin occurred

方法1：@SpringBootTest

SpringBootTest使得创建完整的web上下文变得很容易，这是很棒的。但我无法在中期测试中关闭该应用程序，以强制取消注册。

@RunWith(SpringRunner.class)
@SpringBootTest(
        classes = MyAutoConfig.class,
        webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT
)
@EnableAutoConfiguration
public class DiscoverySpringCloudBootMinimalRegistrationTest {

@Test
public void register_deregister {
    // Force-close app to trigger dereigster (causes exception)
    ((ConfigurableApplicationContext) context).close();

    verify(registry, times(1)).register(autoRegistrationServiceRecord);
    verify(registry, times(1)).deregister(autoRegistrationServiceRecord);
}

context.close()调用会导致长时间的错误，主要是说不要像这样手动关闭上下文。

..... contextLoader = 'org.springframework.boot.test.context.SpringBootContextLoader', parent = [null]]] is not active. This may be due to one of the following reasons: 1) the context was closed programmatically by user code; 2) the context was closed during parallel test execution either according to @DirtiesContext semantics or due to automatic eviction from the ContextCache due to a maximum cache size policy.

方法2: WebContextRunner

在这种方法中，我避免使用@SpringBootTest并手动配置上下文运行程序。这对于调用context.close()很好，但配置中的web上下文有一个模拟servlet，并且不触发自动注册所需的WebInitializedEvent。

public class BasicAutoConfigTests {

    private WebApplicationContextRunner runner;

    @Test
    public void register_deregister() {

       runner = new WebApplicationContextRunner()
              .withConfiguration(
                    AutoConfigurations.of(MyAutoConfig.class));


       runner.run((context) -> {
          assertThat(context).hasNotFailed();

          ServiceRegistry registry = context.getBean(ServiceRegistry.class);
          ServiceRecord autoRegistration = context.getBean(MyServiceRecord.class);
          context.close();

          verify(registry, times(1)).register(autoRegistration);
          verify(registry, times(1)).deregister(autoRegistration);

      });
  }

几乎可以使用，但是会产生一个MockServletContext bean，我认为它无法从spring-cloud-commons触发必需的WebServerInitializedEvent。这种方法如何引导一个真正的、完整的嵌入式tomcat服务器？

Answer 1

按照Spencer的建议，我使用spring应用程序构建器创建了一个完整的web应用程序。我还在自动配置模块之外这样做--在类路径上使用spring-boot-starter-web创建了一个名为“集成测试”的新maven子模块。

@Import(MyAutoConfig.class)
@SpringBootApplication
public class MinStarterBasicApp {

@Bean
ServiceRegistry serviceRegistry() {
    return mock(ServiceRegistry.class);
    }

    static ConfigurableApplicationContext setupWebApp(String... profiles){
        System.setProperty("spring.main.allow-bean-definition-overriding", "true");

        SpringApplication app = new SpringApplicationBuilder(MinStarterBasicApp.class)
                .web(WebApplicationType.SERVLET)
                .profiles(profiles)
                .build();
        return app.run();
    }
}

其中，profiles允许我按名称传递application.properties文件，如下所示。另外，确保我们手动为每个测试创建应用程序上下文是很重要的。

public class StarterBasicAutoconfigTest {

    ConfigurableApplicationContext context;

    @After
    public void teardown() {
        if (context != null && context.isRunning())
            context.close();
    }


    @Test
    public void sometest() {
        context = MinStarterBasicApp.setupWebApp("profile1");

        ServiceRegistry registry = context.getBean(ServiceRegistry.class);
        context.close();

        Mockito.verify(registry, times(1)).register(any());
        Mockito.verify(registry, times(1)).deregister(any());
}