如何测试调用 REST-service 的 GWT-server 方法？

Question

我有这些 GWT-server 类：

AbstractServiceImpl.class

package org.foxclient.gwt.server;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
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.json.JSONConfiguration;
import org.foxclient.gwt.client.answer.DataEvent;
import org.foxclient.gwt.client.service.GenericService;

import javax.ws.rs.core.MediaType;


public abstract class AbstractServiceImpl<T, F> extends RemoteServiceServlet implements GenericService<T, F> {
    public abstract String getRequestURL();
    public abstract Integer getId(T object);

    public DataEvent delete(T object) {
        DataEvent event = new DataEvent();
        if ((object != null) && (getId(object) != null)) {
            Client client = Client.create();
            WebResource webResource = client.resource(getRequestURL() + "/" + getId(object));
            ClientResponse response = webResource.delete(ClientResponse.class);
            event.setStatus(response.getStatus());
            event.setMessage("Success");
        } else {
            event.setStatus(404);
            event.setMessage("Not found");
        }
        return event;
    }

    @Override
    public DataEvent update(T object) {
        DataEvent event = new DataEvent();
        if ((object != null) && (getId(object) != null)) {
            ClientConfig clientConfig =  new DefaultClientConfig();
            clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE);
            Client client = Client.create(clientConfig);
            WebResource webResource = client.resource(getRequestURL() + "/" + getId(object));
            ClientResponse response = webResource.type(MediaType.APPLICATION_JSON).
                    put(ClientResponse.class, object);
            event.setStatus(response.getStatus());
            event.setMessage("Success");
        } else {
            event.setStatus(404);
            event.setMessage("Not found");
        }
        return event;
    }

    @Override
    public DataEvent add(T object) {
        DataEvent event = new DataEvent();
        if (object != null) {
            ClientConfig clientConfig =  new DefaultClientConfig();
            clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE);
            Client client = Client.create(clientConfig);
            WebResource webResource = client.resource(getRequestURL());
            ClientResponse response = webResource.type(MediaType.APPLICATION_JSON).
                                                  post(ClientResponse.class, object);
            if ((response.getStatus() == 200)) {
                event.setStatus(200);
                event.setMessage("Success");
            } else {
                event.setStatus(response.getStatus());
                event.setMessage("Some error");
            }
        } else {
            event.setStatus(400);
            event.setMessage("No data");
        }
        return event;
    }
}

DepartmentServiceImpl.java

package org.foxclient.gwt.server;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.GenericType;
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.json.JSONConfiguration;
import org.foxclient.gwt.client.answer.DepartmentListEvent;
import org.foxclient.gwt.client.answer.DataEvent;
import org.foxclient.gwt.client.entity.Department;
import org.foxclient.gwt.client.entity.Filter;
import org.foxclient.gwt.client.service.DepartmentService;

import java.util.List;

public class DepartmentServiceImpl extends AbstractServiceImpl<Department, Filter> implements DepartmentService {

    public String getRequestURL() {
        return "http://localhost:8080/foxrestful/rest/departments";
    }

    @Override
    public Integer getId(Department object) {
        return object.getId();
    }

    public DataEvent getAll() {
        ClientConfig clientConfig = new DefaultClientConfig();
        clientConfig.getFeatures().put(JSONConfiguration.FEATURE_POJO_MAPPING, Boolean.TRUE);
        Client client = Client.create(clientConfig);

        WebResource resource = client.resource(getRequestURL());
        ClientResponse response = resource.get(ClientResponse.class);
        DepartmentListEvent event = new DepartmentListEvent();
        if ((response.getStatus() == 200) && response.hasEntity()) {
            event.setStatus(200);
            event.setDepartments(response.getEntity(new GenericType<List<Department>>() { }));
        } else {
            event.setStatus(response.getStatus());
            event.setMessage("Some error");
        }
        return event;
    }

    @Override
    public DataEvent getFiltered(Filter filter) {
        return null;
    }
}

我想要测试方法 getAll()、delete(T object) 等。但它们调用远程 REST 服务，我无法拦截此调用。另外，我认为，我不能模拟 WebResource，因为它是我想要测试的方法的内部逻辑。也许我可以拿起 REST-server 并重定向到它？

有什么想法可以测试这些方法吗？

我使用 GWT 2.7.0 作为远程 REST 服务的客户端（由 Jersey 1.19 编写）。另外，如您所见，我使用 Jersey 客户端从服务中获取响应。

谢谢！

Answer 1

getAll(), delete(T object)这两个方法是网络相关的方法所以你需要实现async操作来测试网络相关的操作

理想情况下，它应该用于需要几秒钟的操作。有些任务会让线程长时间运行，所以在这种情况下建议使用 java.util.concurrent 包，例如 Executor、ThreadPoolExecutor 和 FutureTask。