Wicket CDI application junit test

Hi everyone.
I'm trying to write some tests for my wicket-cdi application. But I can't
init wicket WebApplication, resulting:

javax.naming.NamingException: Lookup failed for 'java:comp/BeanManager' in
SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory,
java.naming.factory.url.pkgs=com.sun.enterprise.naming,
java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl}
[Root exception is javax.naming.NamingException: Invocation exception: Got
null ComponentInvocation ]
in WebAdminApplication.java row:
manager = (BeanManager)new InitialContext().lookup("java:comp/BeanManager");

LoginPageTest.java
public class LoginPageTest {
private static WicketTester tester;
@BeforeClass
public static void setUpClass() {
tester = new WicketTester(new WebAdminApplication());

@AfterClass
public static void tearDownClass() {

@Test
public void testRenderLoginPage() {
LoginPage p = tester.startPage(LoginPage.class);
tester.assertRenderedPage(LoginPage.class);
...

WebAdminApplication.java
public class WebAdminApplication extends WebApplication {
protected void init() {
super.init();
BeanManager manager = null;
try {
manager = (BeanManager)new
InitialContext().lookup("java:comp/BeanManager");
} catch (NamingException ex) {
logger.error("Error while creating BeanManager. Error text: {}",
ex.toString());

new CdiConfiguration(manager).configure(this);
...

How I can get BeanManager for tests?