如何单元测试Jersey+Guice:服务定位器？

Question

使用HK2的 guice-bridge 我设法整合了Jersey2。X与Guice3。x.

public class MyApp extends ResourceConfig {

    @Inject
    public MyApp(ServiceLocator serviceLocator) {
        packages("com.mycompany");

        ...

        GuiceBridge.getGuiceBridge().initializeGuiceBridge(serviceLocator);
        GuiceIntoHK2Bridge guiceBridge = serviceLocator.getService(GuiceIntoHK2Bridge.class);
        guiceBridge.bridgeGuiceInjector(GuiceContext.INJECTOR);
    }
}

但现在我的球衣测试已经不起作用了。

public abstract class AbstractJerseyTest extends JerseyTest {

    public AbstractJerseyTest() throws TestContainerException {
        super(new InMemoryTestContainerFactory());
    }

    protected Application configure() {
        new MyApp(); // ERROR: missing 'ServiceLocator'
    }

}

那么我在哪里得到一个 ServiceLocator 为了我的单元测试？

Answer 1

我们在Groovy的帮助下使其工作：

public class MemoryTestContainerFactory implements TestContainerFactory {

    private final Class<? extends Application> jaxrsApplicationClass;

    public MemoryTestContainerFactory(Class<? extends Application> jaxrsApplicationClass) {
        this.jaxrsApplicationClass = jaxrsApplicationClass;
    }

    @Override
    public TestContainer create(URI baseUri, DeploymentContext context) throws IllegalArgumentException {
        return new MemoryTestContainer(jaxrsApplicationClass, baseUri, context);
    }

    private static class MemoryTestContainer implements TestContainer {

        private final URI baseUri;
        private final ApplicationHandler appHandler;
        private final AtomicBoolean started = new AtomicBoolean(false);

        private static final Logger LOGGER = Logger.getLogger(MemoryTestContainer.class.getName());

        MemoryTestContainer(Class<? extends Application> jaxrsApplicationClass, URI baseUri, DeploymentContext context) {
            this.baseUri = UriBuilder.fromUri(baseUri).path(context.getContextPath()).build();    
            this.appHandler = new ApplicationHandler(jaxrsApplicationClass);
        }

        @Override
        public ClientConfig getClientConfig() {
            def provider = new InMemoryConnector.Provider(baseUri, appHandler) // private access (only works with Groovy)
            return new ClientConfig().connectorProvider(provider);
        }

        @Override
        public URI getBaseUri() {
            return baseUri;
        }

        @Override
        public void start() {
            if (started.compareAndSet(false, true)) {
                LOGGER.log(Level.FINE, "Starting InMemoryContainer...");
            } else {
                LOGGER.log(Level.WARNING, "Ignoring start request - InMemoryTestContainer is already started.");
            }
        }

        @Override
        public void stop() {
            if (started.compareAndSet(true, false)) {
                LOGGER.log(Level.FINE, "Stopping InMemoryContainer...");
            } else {
                LOGGER.log(Level.WARNING, "Ignoring stop request - InMemoryTestContainer is already stopped.");
            }
        }
    }
}

.

它不漂亮，但它有效。

Answer 2

也许更清洁的方法是简单地使用 Feature 并配置网桥 在那儿 而不是在 ResourceConfig

public class GuiceFeature implements Feature {

    public void configure(FeatureContext context) {
        ServiceLocator serviceLocator = ServiceLocatorProvider.getServiceLocator(context);
        GuiceBridge.getGuiceBridge().initializeGuiceBridge(serviceLocator);
        GuiceIntoHK2Bridge guiceBridge = serviceLocator.getService(GuiceIntoHK2Bridge.class);
        guiceBridge.bridgeGuiceInjector(GuiceContext.INJECTOR);
    }
}

这可以像任何其他功能一样注册。只是 register 它或扫描它 @Provider.

注意 ServiceLocatorProvider 只有球衣2.6及以上。

Answer 3

这是一个解决的解决方案。

密钥是覆盖jerseytest的DefableDe雇工（）方法，并通过传递应用程序特定的ResourceConfig.Class而不是覆盖Configure（）方法并返回ResourceConfig实例来创建DeploymentContext，以便正确地初始化Guice-Bridge。

这是通过以下版本的泽西，Guice和HK2 Guice-Bridge

    <jersey.version>2.15</jersey.version>
    <jackson2.version>2.4.4</jackson2.version>
    <hk2.guice.bridge.version>2.4.0-b10</hk2.guice.bridge.version>
    <guice.version>4.0-beta5</guice.version>

.

1）我的服务类

public interface MyService {
    public void hello();
}

.

2）我的模拟服务ich

public class MyMockServiceImpl implements MyService{
    public void hello() {
        System.out.println("Hi");
    }
} 

.

3）我的资源类，带有guice注入服务

@Path("myapp")
public class MyResource {

    private final MyService myService;

    @Inject
    public MyResource(MyService myService) {
        this.myService = myService;
    }
}

.

4）我的资源测试类

public class MyResourceTest extends JerseyTestNg.ContainerPerClassTest {

    @Override
    protected Application configure() {
        return null;
    }

    @Override
    protected DeploymentContext configureDeployment() {
        return DeploymentContext.builder(MyTestConfig.class).build();
    }

    // other test and setup/teardown methods
}

.

5）ResourceConfig类

static class MyTestConfig extends ResourceConfig {

    @Inject
    public MyTestConfig(ServiceLocator serviceLocator) {

        packages("com.myapp.rest");

        GuiceBridge.getGuiceBridge().initializeGuiceBridge(serviceLocator);

        GuiceIntoHK2Bridge guiceBridge = serviceLocator.getService(GuiceIntoHK2Bridge.class);
        guiceBridge.bridgeGuiceInjector(Guice.createInjector(new MyTestModule()));

    }
}

.

6）我的guice测试模块类

public class MyTestModule implements Module {

    @Override
    public void configure(Binder binder) {
            binder.bind(MyService.class)
               .to(MyMockServiceImpl.class);
    }

}

.

Answer 4

注:我以前从未使用过泽西岛。但是，你不应该打电话 new MyApp() 又来了;否则Guice就行不通了。相反，我可能会尝试这样的事情:

public abstract class AbstractJerseyTest extends JerseyTest {
    private final Module[] modules;

    public AbstractJerseyTest(Module... modules) throws TestContainerException {
        super(new InMemoryTestContainerFactory());
        this.module = modules;
    }

    protected Application configure() {
        Injector inj = Guice.createInjector(modules);
        return inj.getInstance(MyApp.class);
    }
}

public class ActualTest extends AbstractJerseyTest {
    private static class TestModule extends AbstractModule {
        @Override
        public void configure() {
            // Do your guice bindings here
        }
    }

    public ActualTest() throws TestContainerException {
        super(new TestModule());
    }
}