Servlet context injection fail while using jersey test framework

I'm beginning with jersey and trying to get freemarker working with it using TDD. I want to make a ViewProcessor for my templates, but fail to inject the servlet context in the class.

Here is the class code :

@Provider
public class myProcessor implements ViewProcessor<Template> {

    [...]

    @Context
    public ServletContext myContext;

    [...]

 freemarkerConfiguration.setTemplateLoader(
       new WebappTemplateLoader(myContext,
           myContext.getInitParameter("freemarker.template.path")));

    [...]
    }

And here is the test code :

public class myProcessorTest extends JerseyTest {

    public static myProcessor mp;

    public myProcessorTest() throws Exception{
        super(new WebAppDescriptor.Builder("com.domain").build());
    }

    @Test
    public void firstTest(){
        mp = new myProcessor();
        String path = new String("test.ftl");
        Template template = mp.resolve(path);
        assertNotNull(template);
    }
}

I use maven with dependencies as follow :

<dependency>
    <groupId>com.sun.jersey.jersey-test-framework</groupId>
    <artifactId>jersey-test-framework-grizzly</artifactId>
    <version>1.5-SNAPSHOT</version>
    <scope>test</scope>
</dependency>

My code runs fine when i deploy to my local jetty server. But if i want to test the code in my IDE, it failed to inject the servlet context (@Context) : myContext is null when I run the test :/

I think I'm missing something, but I'm a complete beginner with servlet world.