REST service test with JUnit using Java EE annotations

Question

I use Java EE 6 running on GlassFish and Jersey.

How can I mock a request to this resource with some custom headers, and some other request details?

@Stateless
@Path("/user")
public class Resources {

@Contex
private HttpServletRequest request;
....

@GET
@Path("/settings")
@Produces("application/json")
@Consumes("text/plain")
public AccountSettings accountSettings() {
    //check custom headers and request content do some stuff
    return accountSettings;
}

    ....
}

And this is my java code, but I get null pointer exception on res.accountSettings() because request is still null.

@Mock
HttpServletRequest request= Mockito.mock(HttpServletRequest.class);

@Test
public void testResources() {
    when(request.getHeader(HTTP_AUTHORIZATION_HEADER)).thenReturn("Basic wedwd");
    Resources res=new Resources();
    AccountSettings response=res.accountSettings();

}

Instead of create with new keyword, When I use this then I also get the resources null.

 @Inject Resources resources

Answer 1

I believe you can do as follow with an @InjectMocks annotation, it outside any JAXRS context or CDI injection stuff, it treated as a regular java class.

@RunWith(MockitoJUnitRunner.class)
public class ResourcesTest {

    @Mock HttpServletRequest request;

    @InjectMocks Resources res;

    @Test
    public void testResources() {
        // given
        when(request.getHeader(HTTP_AUTHORIZATION_HEADER)).thenReturn("Basic wedwd");

        // when
        AccountSettings response = res.accountSettings();

        // then
        ...
    }
}