Spring @Autowired constructor causes @Value to return null when instantiated in test class
<p>I'm using an autowired constructor in a service that when instantiated in the test class causes the @Value annotations to return null. Autowiring the dependencies directly solves the problem but the project follows the convention of using constructor based autowiring. My understanding is that instantiating the service in the test class is not creating it from the Spring IoC container which causes @Value to return null. Is there a way to create the service from the IoC container using constructor based autowiring without having to directly access the application context?</p>

<p>Example Service:</p>

<pre><code>@Component
public class UpdateService {

   @Value("${update.success.table}")
   private String successTable;

   @Value("${update.failed.table}")
   private String failedTable;

   private UserService userService

   @Autowired
   public UpdateService(UserService userService) {
      this.userService = userService;
   }
}
</code></pre>

<p>Example Test Service:</p>

<pre><code>@RunWith(SpringJUnite4ClassRunner.class)
@SpringApplicationConfiguration(classes = {TestApplication.class})
@WebAppConfiguration
public class UpdateServiceTest {

   private UpdateService updateService;

   @Mock
   private UserService mockUserService;

   @Before
   public void setUp() {
      MockitoAnnotations.initMocks(this);

      updateService = new UpdateService(mockUserService);

   }
}
</code></pre>