使用 JerseyTest、Maven 和 TestNG 测试 Jersey-Spring 集成

Question

我想使用 Jersey 测试框架测试我的 Jersey 资源。

我按照此处提供的描述

• http://blogs.oracle.com/naresh/entry/jersey_test_framework_makes_it
• http://zhanghaoeye.javaeye.com/blog/441759

创建一个简单的示例。我的示例作为 git 存储库托管在 http://github.com/rmetzler/Jersey-Test 上。

$ mvn jetty:run 按预期工作，但在运行 $ mvn clean test 时我不断收到 NullPointerExceptions。

java.lang.NullPointerException
at com.sun.jersey.spi.container.ContainerResponse.mapException(ContainerResponse.java:429)
at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1295)
at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1239)
at com.sun.jersey.test.framework.impl.container.inmemory.TestResourceClientHandler.handle(TestResourceClientHandler.java:119)
at com.sun.jersey.api.client.Client.handle(Client.java:616)
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:559)
at com.sun.jersey.api.client.WebResource.get(WebResource.java:182)
at example.jersey.spring.MyResourceTest.testMyResource(MyResourceTest.java:30)
...

我敢打赌我犯了一个我无法发现的小错误。我会向另一位开发人员展示我的源代码，但不幸的是我独自在家工作。那么也许你们中有人可以帮助我？

更新

我通过运行 $ mvn eclipse:eclipse 创建了一个 Eclipse 项目。现在，当我在 Eclipse 中作为 JUnit Test 运行测试时，它是绿色的。当将其作为 TestNG Test 运行时，它会失败。所以我猜这与 TestNG 执行测试的方式有关。

Answer 1

我做了同样的事情，除了我使用的是 guice，而不是 spring。这是我的实现（抱歉，没有时间清理，您必须自己提取有趣的部分）。请注意，我使用了委托 jerseytest 类，因此我可以从基本测试类继承一些代码。此外，您还必须将 junit 前置方法和后置方法映射到 testng 方法。

希望这会有所帮助。

package mypackage;

import java.io.IOException;
import java.io.StringReader;
import java.net.URI;
import java.net.URL;
import java.util.Map;
import java.util.Set;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.UriBuilder;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.dom.DOMSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;

import org.apache.commons.lang.UnhandledException;
import org.apache.xerces.dom.DOMInputImpl;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.FunctionObject;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.ScriptableObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.w3c.dom.Document;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import static org.fest.assertions.Assertions.assertThat;
import static org.fest.reflect.core.Reflection.staticMethod;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.UniformInterfaceException;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.config.ClientConfig;
import com.sun.jersey.api.client.config.DefaultClientConfig;
import com.sun.jersey.api.core.PackagesResourceConfig;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.guice.spi.container.servlet.GuiceContainer;
import com.sun.jersey.spi.container.WebApplication;
import com.sun.jersey.spi.container.WebApplicationFactory;
import com.sun.jersey.test.framework.AppDescriptor;
import com.sun.jersey.test.framework.JerseyTest;
import com.sun.jersey.test.framework.LowLevelAppDescriptor;
import com.sun.jersey.test.framework.impl.container.inmemory.TestResourceClientHandler;
import com.sun.jersey.test.framework.spi.container.TestContainer;
import com.sun.jersey.test.framework.spi.container.TestContainerException;
import com.sun.jersey.test.framework.spi.container.TestContainerFactory;
import com.sun.jersey.test.framework.spi.container.inmemory.InMemoryTestContainerFactory;

import mypackage.StaticConfig;
import mypackage.MediaTypes;

public abstract class JerseyIntegrationTestBase extends TransactionalIntegrationTestBase {

    private static final Logger LOG = LoggerFactory.getLogger( JerseyIntegrationTestBase.class );

    private static final class GuiceInMemoryTestContainerFactory extends InMemoryTestContainerFactory {

        @Override
        public TestContainer create( final URI baseUri, final AppDescriptor ad ) {
            return new GuiceInMemoryTestContainer( baseUri, (LowLevelAppDescriptor) ad );
        }

        /**
         * Kopie der Klasse im inmemory-Testcontainer von Jersey, leicht an Guice-Injection angepasst. The class defines methods for
         * starting/stopping an in-memory test container, and for running tests on the container.
         */
        private static class GuiceInMemoryTestContainer implements TestContainer {

            final URI baseUri;

            final ResourceConfig resourceConfig;

            final WebApplication webApp;

            /**
             * Creates an instance of {@link GuiceInMemoryTestContainer}
             * 
             * @param Base
             *            URI of the application
             * @param An
             *            instance of {@link LowLevelAppDescriptor}
             */
            private GuiceInMemoryTestContainer( final URI baseUri, final LowLevelAppDescriptor ad ) {
                this.baseUri = UriBuilder.fromUri( baseUri ).build();

                LOG.info( "Creating low level InMemory test container configured at the base URI " + this.baseUri );

                resourceConfig = ad.getResourceConfig();
                // Falls man mal in Tests die requests und responses sehen möchte:
                // this.resourceConfig.getProperties().put( ResourceConfig.PROPERTY_CONTAINER_REQUEST_FILTERS,
                // LoggingFilter.class.getName() );
                // this.resourceConfig.getProperties().put( ResourceConfig.PROPERTY_CONTAINER_RESPONSE_FILTERS,
                // LoggingFilter.class.getName() );
                resourceConfig.getProperties().putAll( StaticConfig.getJerseyParams() );
                webApp = WebApplicationFactory.createWebApplication();
            }

            @Override
            public Client getClient() {
                ClientConfig clientConfig = null;
                final Set providerSingletons = resourceConfig.getProviderSingletons();

                if ( providerSingletons.size() > 0 ) {
                    clientConfig = new DefaultClientConfig();
                    for ( final Object providerSingleton : providerSingletons ) {
                        clientConfig.getSingletons().add( providerSingleton );
                    }
                }

                final Client client = clientConfig == null
                    ? new Client( new TestResourceClientHandler( baseUri, webApp ) )
                    : new Client( new TestResourceClientHandler( baseUri, webApp ), clientConfig );

                return client;
            }

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

            @Override
            public void start() {
                if ( !webApp.isInitiated() ) {
                    LOG.info( "Starting low level InMemory test container" );
                    webApp.initiate( resourceConfig, new GuiceContainer( null ).new ServletGuiceComponentProviderFactory(
                            resourceConfig, IntegrationTestBase.getInjector() ) );
                }
            }

            @Override
            public void stop() {
                if ( webApp.isInitiated() ) {
                    LOG.info( "Stopping low level InMemory test container" );
                    webApp.destroy();
                }
            }

        }
    }

    private final JerseyTest _jerseyTest;

    public JerseyIntegrationTestBase() {

        // PackagesResourceConfig.getPackages macht genau das, was wir wollen, ist aber private, daher
        // auf die harte Tour...
        // FORMATTER: OFF
        final String[] packages =
                staticMethod( "getPackages" ).withReturnType( String[].class ).withParameterTypes( Map.class )
                    .in( PackagesResourceConfig.class ).invoke( StaticConfig.getJerseyParams() );
        // FORMATTER: ON
        _jerseyTest = new JerseyTest( new LowLevelAppDescriptor.Builder( packages ).build() ) {
            @Override
            protected TestContainerFactory getTestContainerFactory() throws TestContainerException {
                return new GuiceInMemoryTestContainerFactory();
            }
        };
    }

    /**
     * @return
     * @see JerseyTest#client().
     */
    protected Client client() {
        return _jerseyTest.client();
    }

    @BeforeClass( alwaysRun = true )
    public void setUp() throws Exception {
        _jerseyTest.setUp();
    }

    @AfterClass( alwaysRun = true )
    public void tearDown() throws Exception {
        _jerseyTest.tearDown();
    }
}

Answer 2

因为 JerseyTest 使用 Junit 的 @Before 注释来初始化应用程序，所以您必须扩展 JerseyTest 才能启用 testng 支持，如下所示：

public class JerseyTestNG extends JerseyTest { 
    @Override
    protected Application configure() {
        ResourceConfig config = new ResourceConfig(YourService.class);
    }

    @BeforeClass 
    public void setUp() {
        super.setUp();
    }

    @AfterClass
    public void tearDown() {
        super.tearDown();
    }
}

@BeforeClass 还将确保在使用 Surefire 插件时，Jersey 容器准备就绪后执行其中的所有测试。否则这些测试很快就会失败。

如果您想读取 applicationContext-test.xml 而不是默认的，请为 ResourceConfig 设置一个属性：

config.setProperties(new HashMap<String, String>() {{
    put("contextConfigLocation", "applicationContext-test.xml");
}});

另外，向 ClientConfig 添加一些功能可能会有所帮助：

@Override
protected void configureClient(ClientConfig config) {
    config.register(LoggingFilter.class);
    config.register(MOXyJsonProvider.class);
    config.register(new EncodingFeature(GZipEncoder.class));
}

全部在 Jersey 2.6 上进行了测试。

Answer 3

此处使用 Jersey + Spring + TestNG + Jetty 的简单示例：

http://ameethpaatil.blogspot.com/2011/09/restful-webservice-jersey-spring-30x.html