@Test
public void testNewRootNotNull() {

    support.fireNewRoot();
    assertEquals(1, report.getEventCount());
    assertEquals(1, report.getStructureEventCount());
    TreeModelEvent structureEvent = report.getLastStructureEvent();
    assertNull(structureEvent.getChildren());
    assertEquals(model.getRoot(), 
            structureEvent.getTreePath().getLastPathComponent());
    assertEquals(1, structureEvent.getPath().length);
}