    @Test
    public void testInvalidNodeId() 
    {

        GlTF gltf = new GlTF();
        Scene scene = new Scene();
        scene.addNodes("INVALID_ID");
        gltf.addScenes("scene0", scene);
        
        Validator validator = new Validator(gltf);
        ValidatorResult validatorResult = validator.validate();
        assertEquals(1, validatorResult.getErrors().size());
    }