@Test
public void testChannelGroupUID() {

    ChannelGroupUID channelGroupUID = new ChannelGroupUID(THING_UID, GROUP_ID);
    assertEquals("binding:thing-type:thing:group", channelGroupUID.toString());
    assertEquals(GROUP_ID, channelGroupUID.getId());
    assertEquals(THING_UID, channelGroupUID.getThingUID());
}