Write Junit tests for Spring MVC application which internally relies upon ContextLoader.getCurrentWebApplicationContext()

Question

I'm trying to write integration tests for a controller in our spring mvc application. The controller invokes a service class which in turn invokes a dao to read/write data from the repository. The DAO needs to lookup some configuration. The configuration bean is defined in WEB-INF/applicationContext.xml. I'm using something like this: Configuration config =(Configuration)ContextLoader.getCurrentWebApplicationContext().getBean("config"); private String namespace = config.getProperty("someproperty"); The properties are stored in zookeeper so I'm not using spring's property management artifacts. The problem is that while running the JUnit test ContextLoader.getCurrentWebApplicationContext() always returns null. I have so far looked at the following approaches: 1. Ted Young's approach ( just google search for spring mvc integration tests ted young) 2. https://github.com/SpringSource/spring-test-mvc 3. this site.. questions/8464919/unit-testing-a-servlet-that-depends-on-springs-webapplicat…

Accepted Answer

You have to manually add the `WebApplicationContext` to `ContextLoaderListener`. This will work.

```
@ContextConfiguration(locations = "classpath:module-test-beans.xml")
@WebAppConfiguration
public class SampleTest extends AbstractTestNGSpringContextTests {

@Autowired
    private WebApplicationContext wac;

@BeforeClass
    public void setUp() throws ServletException {
        MockServletContext sc = new MockServletContext("");
        ServletContextListener listener = new ContextLoaderListener(wac);
        ServletContextEvent event = new ServletContextEvent(sc);
        listener.contextInitialized(event);
    }

@Test
    public void testMe() {
        Assert.assertFalse(ContextLoader.getCurrentWebApplicationContext() == null);
    }
}
```

Write Junit tests for Spring MVC application which internally relies upon ContextLoader.getCurrentWebApplicationContext()

Solution

Problem