测试异步JAX-RS方法

Question

Consider an asynchronous JAX-RS method, part of an OkResource :

@GET
@Path("/ok")
@ManagedAsync
public void getOk(@Suspended final AsyncResponse asyncResponse) {
    asyncResponse.resume("OK");
}

Dropwizard, based on Jersey, provides the useful ResourceTestRule . A test class for the above method would contain an instance of this rule.

@ClassRule
public static ResourceTestRule RULE = ResourceTestRule.builder()
  .addResource(new OkResource())
  .build();

A test method for the JAX-Rs method would look like

@Test
public void testGetOk()  {
    Response response = RULE.target("/ok).request().get();
    // assert ...
}

For synchronous JAX-RS methods this works fine. But for asynchronous JAX-RS like above this approach does not work:

WARN [2019-06-26 09:15:15,811] org.glassfish.jersey.test.inmemory.InMemoryConnector: Asynchronous server side invocations are not supported by InMemoryContainer.

Is there a different way to test asynchronous JAX-RS methods without having to directly call the method ( getOk in this case) with a mocked AsyncResponse ?

Answer 1

The Dropwizard documentation tells us what to do:

• add a Maven dependency for a TestContainerFactory
• set it while building the ResourceTestRule :

@ClassRule
public static ResourceTestRule RULE = ResourceTestRule.builder()
  .setTestContainerFactory(new GrizzlyWebTestContainerFactory())
  .addResource(new OkResource()).build();

The Jersey documentation describes more SPIs .