Jersey Multipart MP3 test

Mp3Test.java

import java.io.File;
import java.io.InputStream;
import java.util.logging.Logger;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.glassfish.jersey.client.ClientConfig;
import org.glassfish.jersey.filter.LoggingFilter;
import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataMultiPart;
import org.glassfish.jersey.media.multipart.FormDataParam;
import org.glassfish.jersey.media.multipart.MultiPart;
import org.glassfish.jersey.media.multipart.MultiPartFeature;
import org.glassfish.jersey.media.multipart.file.FileDataBodyPart;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.test.JerseyTest;
import static org.junit.Assert.assertEquals;
import org.junit.Test;

/*
 * Stack Overflow question: http://stackoverflow.com/q/33405074/2587435
 *
 * Run this like any other JUnit test. Replace the `FILE` with your file.
 * 
 * You will need to following Maven dependences.
 * 
 *       <dependency>
 *           <groupId>org.glassfish.jersey.test-framework.providers</groupId>
 *           <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
 *           <version>2.19</version>
 *           <scope>test</scope>
 *       </dependency>
 *       <dependency> 
 *           <groupId>org.glassfish.jersey.media</groupId>
 *           <artifactId>jersey-media-multipart</artifactId>
 *           <version>2.19</version>
 *       </dependency>
 *
 * @author Paul Samsotha
 */
public class Mp3Test extends JerseyTest {
    
    private static final String FILE = "The Show Goes On.mp3";
    private static final String QUEUE = "qMultipart";
    private static final String EXPECTED = FILE + ":" + QUEUE;
    
    @Path("multipart")
    public static class MultiPartResource {
        @POST
        @Consumes(MediaType.MULTIPART_FORM_DATA)
        public String post(@FormDataParam("file") InputStream file,
                             @FormDataParam("file") FormDataContentDisposition fdcd,
                             @FormDataParam("queue") String queue) throws Exception {
            file.close();
            return fdcd.getFileName() + ":" + queue;
        }
    }
    
    @Override
    public ResourceConfig configure() {
        return new ResourceConfig(MultiPartResource.class)
                .register(MultiPartFeature.class)
                .register(new LoggingFilter(Logger.getAnonymousLogger(), true));
    }
    
    @Override
    public void configureClient(ClientConfig config) {
        config.register(MultiPartFeature.class);
    }
    
    @Test
    public void test() {
        FileDataBodyPart filePart = new FileDataBodyPart("file", new File(FILE));
        filePart.setContentDisposition(
                FormDataContentDisposition.name("file").fileName(FILE).build());
        filePart.setMediaType(MediaType.valueOf("audio/mpeg"));
        
        MultiPart multiPart = new FormDataMultiPart()
                .field("queue", QUEUE, MediaType.TEXT_PLAIN_TYPE)
                .bodyPart(filePart);
        
        Response response = target("multipart").request()
                .post(Entity.entity(multiPart, MediaType.MULTIPART_FORM_DATA_TYPE));
        assertEquals(200, response.getStatus());
        assertEquals(EXPECTED, response.readEntity(String.class));
        response.close();
    }
}

Thanks for the nice example.
I have one question:
My resource class MultiPartResource does not have a no argument constructor but has one argument constructor taking Configuration class, what changes I have to make ?
I will have to mock this configuration class and pass the mock to the resource class
I get the error "Could not find a suitable constructor..." and I guess it is because of the line 'return new
ResourceConfig(MultiPartResource.class)'.

Also, if I am saving the uploaded file to disk using a private method in my resource class, how do I test this ? I tried to use the PowerMock
but it seems since I am extending the JerseyTest there is some issue.

Thanks for your help.

This is super helpful! Thanks :)