Resteasy Server-side Mock Framework

问题:

I am using Resteasy serverside mock framework to test my service. I dont want to test business logic but I would like test the data produced by the service.

Using this approach I am able to create a simple test. However, in my RestEasy service I have a few dependency which I would like to mock.

See the following example service which I would like test. The collaborator must be mocked so the service can be tested.

@Path("v1")
Class ExampleService {
    @inject
    private Collaborator collaborator;

    @GET
    @Path("/")
    @Produces({ "application/xml", "application/json" })
    public Response getDummy() throws WSAccessException, JsonParseException,    JsonMappingException, IOException {

        ...
        Result result = collaborator.getResult();
        ..
        return Response.ok("helloworld").build();
    }
}

The junit test is the following

@Test
public void testfetchHistory() throws URISyntaxException {
    Dispatcher dispatcher = MockDispatcherFactory.createDispatcher();
    POJOResourceFactory noDefaults = new POJOResourceFactory(ExampleService.class);
    dispatcher.getRegistry().addResourceFactory(noDefaults);
    MockHttpRequest request = MockHttpRequest.get("v1/");
    MockHttpResponse response = new MockHttpResponse();

    dispatcher.invoke(request, response);


    Assert.assertEquals(..);         
}

How can I mock the collaborator in the test?

回答1:

This worked for me using EasyMock

    @Test
public void testfetchHistory() throws URISyntaxException {

    Collaborator mockCollaborator  = EasyMock.createMock(Collaborator.class);
    Result result = new Result();
    EasyMock.expect(mockCollaborator.getResult()).andReturn(result);
    EasyMock.replay(mockCollaborator);

    ExampleService obj = new ExampleService();
    obj.setCollaborator(mockCollaborator);

    Dispatcher dispatcher = MockDispatcherFactory.createDispatcher();
    dispatcher.getRegistry().addSingletonResource(obj);
    MockHttpRequest request = MockHttpRequest.get("v1/");
    MockHttpResponse response = new MockHttpResponse();

    dispatcher.invoke(request, response);

    Assert.assertEquals(..); 

    EasyMock.verify(mockCollaborator);       
}

回答2:

Alternatively you can use testfun-JEE for running a lightweight JAX-RS (based on RESTeasy and TJWS) inside your test and using testfun-JEE's JaxRsServer junit rule for building REST requests and asserting the responses.

testfun-JEE supports injection of other EJBs as well as mock objects into your JAX-RS resource class.