@Test
public void testGetGroupItemSelectorProviderTypesWithRegisteredGroupItemSelectorProvider() {

	ReflectionTestUtil.setFieldValue(
		GroupItemSelectorTrackerUtil.class, "_serviceTrackerMap",
		new MockServiceTrackerMap(
			Collections.singletonMap(
				"test", new MockGroupItemSelectorProvider())));
	Assert.assertEquals(
		Collections.singleton("test"),
		GroupItemSelectorTrackerUtil.getGroupItemSelectorProviderTypes());
	ReflectionTestUtil.setFieldValue(
		GroupItemSelectorTrackerUtil.class, "_serviceTrackerMap", null);
}