如何阻止其他 JUnit 测试窃取我的 Spring Root Controller？

Question

我有一个看起来像这样的 JUnit 测试 - 它是一个更大的应用程序的一部分。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(loader = AnnotationConfigContextLoader.class, classes = { MyTestConfig.class })
public class MyHandlerInterceptorTest  {

    @Autowired
    private RequestMappingHandlerMapping requestMappingHandlerMapping;

    @Test
    public void myTest() throws Exception {
        MockHttpServletRequest request = new MockHttpServletRequest("GET",
            "/myrequest");
        HandlerExecutionChain handlerExecutionChain = requestMappingHandlerMapping.getHandler(request);
    }
}

当我单独运行测试时 - 它运行良好。

当我将它作为其他测试套件的一部分运行时 - 我收到错误

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.MyHandlerInterceptorTest  ': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping com.MyHandlerInterceptorTest.requestMappingHandlerMapping; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Initialization of bean failed; nested exception is org.springframework.context.ApplicationContextException: Cannot reinitialize with different application context: current one is [Root WebApplicationContext: startup date [XXX 2016]; root of context hierarchy], passed-in one is [org.springframework.context.support.GenericApplicationContext@4760457f: startup date [XXX 2016]; root of context hierarchy]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1116)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:376)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:110)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:313)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:211)
....
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping com.MyHandlerInterceptorTest.requestMappingHandlerMapping; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Initialization of bean failed; nested exception is org.springframework.context.ApplicationContextException: Cannot reinitialize with different application context: current one is [Root WebApplicationContext: startup date [XXX 2016]; root of context hierarchy], passed-in one is [org.springframework.context.support.GenericApplicationContext@4760457f: startup date [Fri Mar 18 11:01:19 EST 2016]; root of context hierarchy]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)

似乎正在发生的事情是我的测试上下文被其他测试窃取了。我想知道如何识别何时发生并阻止它，或者至少解决它。

我的问题是：如何阻止其他 JUnit 测试窃取我的 Spring Root Controller？

Answer 1

您可能希望将此上下文与其他测试上下文隔离开来。您可以通过name attribute of @ContextConfiguration 命名上下文来做到这一点：

@ContextConfiguration(loader = AnnotationConfigContextLoader.class,
    classes = { MyTestConfig.class }, name = "UniqueName")

Answer 2

感谢@luboskrnac 提供最有见地的答案。它对我来说不太成功 - 所以我正在写我最终做了什么。

我尝试在非根类加载器中隔离 Web 上下文，如下所示：

import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.mock.web.MockServletContext;
import org.springframework.web.context.support.GenericWebApplicationContext;

DefaultListableBeanFactory dlbf = new DefaultListableBeanFactory(getApplicationContext().getBeanFactory());
GenericWebApplicationContext gwac = new GenericWebApplicationContext(dlbf);
MockServletContext mockServletContext = new MockServletContext();
mockServletContext .setAttribute(GenericWebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, gwac);
gwac.setServletContext(msc);
gwac.refresh();

有趣的是——这实际上与上面@luboskrnac 建议的相同——但他的解决方案要优雅得多。

不幸的是，这导致我的 ehcache 出现错误（事实证明 - 只希望在 JVM 中加载一次类，而不管类加载器或 Spring-context 分区如何）。

SEVERE: Servlet.service() for servlet [SpringDispatcher] in context with path [/FileService] threw exception [com.sun.jersey.api.container.ContainerException: Unable to create resource class com.myapp.FileStoreAccessAction] with root cause
net.sf.ehcache.CacheException: Another unnamed CacheManager already exists in the same  VM. Please provide unique names for each CacheManager in the config or do one of following:
1. Use one of the CacheManager.create() static factory methods to reuse same CacheManager with same name or create one if necessary
2. Shutdown the earlier cacheManager before creating new one with same name.
The source of the existing CacheManager is: InputStreamConfigurationSource [stream=java.io.BufferedInputStream@e782a8]

所以我最终做的是将测试作为单独的肯定测试执行的一部分运行，如下所示：

<build>
<plugins>
    <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <executions>
            <execution>
                <phase>test</phase>
                <id>test-1</id>
                <configuration>
                    ...
                </configuration>
                <goals><goal>test</goal></goals>
            </execution>
            <execution>
                <phase>test</phase>
                <id>test-2</id>
                <configuration>
                    ...
                </configuration>
                <goals><goal>test</goal></goals>
            </execution>
        </executions>
    </plugin>
</plugins>
...
</build>