/** 
 * Test that the header contribution is added correctly.
 */
@Test public void testRenderHead(){
  WicketTester tester=new WicketTester();
  try {
    tester.startPage(VelocityJavaScriptPage.class);
    System.out.println(tester.getLastResponseAsString());
    tester.assertContains("msg1: " + VelocityJavaScriptPage.MSG1);
  }
  finally {
    tester.destroy();
  }
}