@Test
public void testRootInitializedInConstructor() {
Group g = new Group();
Scene scene = new Scene(g);
assertEquals(g, scene.getRoot());
assertEquals(scene, g.getScene());
}
@Test
public void testRootUpdatedWhenAddedToScene() {
Scene scene = new Scene(new Group());
Group g = new Group();
scene.setRoot(g);
assertEquals(g, scene.getRoot());
assertEquals(scene, g.getScene());
}
@Test
public void testRootUpdatedWhenChangedInScene() {
Group g = new Group();
Scene scene = new Scene(g);
Group g2 = new Group();
scene.setRoot(g2);
assertNull(g.getScene());
assertEquals(g2, scene.getRoot());
assertEquals(scene, g2.getScene());
}