HTTPServiceTest.java

import org.jboss.resteasy.core.Dispatcher;
import org.jboss.resteasy.mock.*;
public class HTTPServiceTest {
    /**
     * Return a multipart/form-data MockHttpRequest
     * @param parts Key is the name of the part, value is either a String or a File.
     * @return
     */
    private MockHttpRequest multipartRequest(String uri, Map parts) throws URISyntaxException, IOException {
        MockHttpRequest req = MockHttpRequest.post(uri);
        String boundary = UUID.randomUUID().toString();
        req.contentType("multipart/form-data; boundary=" + boundary);

        //Make sure this is deleted in afterTest()
        File tmpMultipartFile = Files.createTempFile(null, null).toFile();
        System.out.println("Tmp file:" + tmpMultipartFile.getAbsolutePath());
        FileWriter fileWriter = new FileWriter(tmpMultipartFile);
        fileWriter.append("--").append(boundary);

        for(Map.Entry entry : parts.entrySet()) {
           if(entry.getValue() instanceof String) {
               fileWriter.append("\n");
               fileWriter.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"").append("\n\n");
               fileWriter.append(entry.getValue().toString()).append("\n");
               fileWriter.append("--").append(boundary);
           } else if(entry.getValue() instanceof File) {
               fileWriter.append("\n");
               File val = (File) entry.getValue();
               fileWriter.append(String.format("Content-Disposition: form-data; name=\"%s\"; filename=\"%s\"",
                                               entry.getKey(), val.getName())).append("\n");
               fileWriter.append("Content-Type: application/octet-stream").append("\n\n");

               FileInputStream fis = new FileInputStream(val);
               int b = fis.read();
               while(b >= 0) {
                   fileWriter.write(b);
                   b = fis.read();
               }
               fileWriter.append("\n").append("--").append(boundary);

           }
        }
        fileWriter.append("--");
        fileWriter.flush();
        fileWriter.close();
        req.setInputStream(new FileInputStream(tmpMultipartFile));
        return req;
    }
    
    public void testSomething() {
        Map parts = new HashMap();

        parts.put("foo1", "bar1");
        parts.put("foo2", "bar2");
        parts.put("aFile", new File("path-to-file"));
        MockHttpRequest request = multipartRequest("/path/to/service", parts);
        MockHttpResponse response = new MockHttpResponse();

        Dispatcher dispatcher = MockDispatcherFactory.createDispatcher();
        dispatcher.getRegistry().addSingletonResource(new MyHTTPService());

        dispatcher.invoke(request, response);
    }
}