private void assertAnnouncement(
Set<ServiceAnnouncement> actualAnnouncements, ServiceAnnouncement expected) {
Assert.assertNotNull(actualAnnouncements);
Assert.assertEquals(actualAnnouncements.size(), 1);
ServiceAnnouncement announcement = Iterables.getOnlyElement(actualAnnouncements);
Assert.assertEquals(announcement.getType(), expected.getType());
Assert.assertEquals(announcement.getProperties(), expected.getProperties());
}