webapplicationtest.java

resetful样式的ws样例,一种面向资源的webservices服务

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package com.sun.jersey.impl.application;

import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.api.core.HttpResponseContext;
import com.sun.jersey.api.core.HttpRequestContext;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.api.core.DefaultResourceConfig;
import com.sun.jersey.spi.container.ContainerRequest;
import com.sun.jersey.spi.container.ContainerResponse;
import com.sun.jersey.spi.container.ContainerResponseWriter;
import com.sun.jersey.spi.container.InBoundHeaders;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import junit.framework.*;

/**
 *
 * @author [e-mail]
 */
public class WebApplicationTest extends TestCase {
    
    public WebApplicationTest(String testName) {
        super(testName);
    }
    
    @Path("/{arg1}/{arg2}")
    public static class TestOneWebResource {
        @Context UriInfo info;
        
        @GET
        public void handleRequest(HttpRequestContext request, HttpResponseContext response) {
            assertEquals("GET", request.getHttpMethod());
            
            assertEquals("a", info.getPathParameters().getFirst("arg1"));
            assertEquals("b", info.getPathParameters().getFirst("arg2"));
            
            String s = request.getEntity(String.class);
            assertEquals("RESOURCE-ONE", s);
        }
    }
    
    @Path("/{arg1}")
    public static class TestTwoWebResource {
        @Context UriInfo info;
        
        @GET
        public void handleRequest(HttpRequestContext request, HttpResponseContext response) {
            assertEquals("GET", request.getHttpMethod());
            
            System.out.println(info.getPath());
            String v = info.getPathParameters().getFirst("arg1");
            boolean b = v.equals("a") || v.equals("a.foo");
            assertTrue(b);
            
            String s = request.getEntity(String.class);
            assertEquals("RESOURCE-TWO", s);
        }
    }
    
    @Path("/{arg1}.xml")
    public static class TestThreeWebResource {
        @Context UriInfo info;
        
        @GET
        public void handleRequest(HttpRequestContext request, HttpResponseContext response) {
            assertEquals("GET", request.getHttpMethod());
            
            System.out.println(info.getPath());
            assertEquals("a", info.getPathParameters().getFirst("arg1"));
            
            String s = request.getEntity(String.class);
            assertEquals("RESOURCE-THREE", s);
        }
    }
        
    public void testOneResource() {
        WebApplicationImpl a = createWebApplication(
                TestOneWebResource.class);
        
        call(a, "GET", "/a/b", "RESOURCE-ONE");
    }
    
    public void testTwoResource() {
        WebApplicationImpl a = createWebApplication(
                TestOneWebResource.class, 
                TestTwoWebResource.class);
        
        call(a, "GET", "/a/b", "RESOURCE-ONE");
        call(a, "GET", "/a", "RESOURCE-TWO");
    }
    
    public void testThreeResource() {
        WebApplicationImpl a = createWebApplication(
                TestOneWebResource.class,
                TestTwoWebResource.class,
                TestThreeWebResource.class);
        
        call(a, "GET", "/a/b", "RESOURCE-ONE");
        call(a, "GET", "/a", "RESOURCE-TWO");
        call(a, "GET", "/a.foo", "RESOURCE-TWO");
        call(a, "GET", "/a.xml", "RESOURCE-THREE");
    }

    public void testResourcesWithOnePath() {
        WebApplicationImpl a = createWebApplication(
            com.sun.jersey.impl.application.ResourceOne.class,
            com.sun.jersey.impl.application.ResourceTwo.class);
        
        call(a, "GET", "/resource1", "RESOURCE-ONE");
        call(a, "GET", "/resource2", "RESOURCE-TWO");
        call(a, "GET", "/resource2", "RESOURCE-TWO");
        call(a, "GET", "/resource1", "RESOURCE-ONE");
        call(a, "GET", "/resource1", "RESOURCE-ONE");
        call(a, "GET", "/resource1", "RESOURCE-ONE");
        call(a, "GET", "/resource2", "RESOURCE-TWO");
        call(a, "GET", "/resource2", "RESOURCE-TWO");
    }
    
    public WebApplicationImpl createWebApplication(Class... resources) {
        final Set<Class<?>> s = new HashSet<Class<?>>();
        for (Class resource : resources)
            s.add(resource);
        
        WebApplicationImpl a = new WebApplicationImpl();
        ResourceConfig c = new DefaultResourceConfig(s);
        a.initiate(c);
        return a;
    }
    
    public void call(WebApplicationImpl a, String method, String path, String content) {
        ByteArrayInputStream e = new ByteArrayInputStream(content.getBytes());
        final ContainerRequest request = new ContainerRequest(
                a, 
                method, 
                URI.create("/"),
                URI.create(path),
                new InBoundHeaders(),
                e
                );
        
        final ContainerResponse response = new ContainerResponse(
                a,
                request,
                new ContainerResponseWriter() {
                    public OutputStream writeStatusAndHeaders(long contentLength, 
                            ContainerResponse response) throws IOException {
                        return new ByteArrayOutputStream();
                    }
                });
        
        try { 
            a.handleRequest(request, response);
        } catch (IOException ex) {
            throw new ContainerException(ex);
        }

        if (response.getEntity() != null) {
            assertEquals(200, response.getStatus());        
        } else {            
            assertEquals(204, response.getStatus());        
        }
    }
}