assertEquals(1, events.size());
if (mode.get() == 0) {
assertTrue(CoreUtils.isLabelChange(events.iterator().next()));
assertTrue(CoreUtils.isLabelChange(events));
counter.incrementAndGet();
}
else if (mode.get() == 1) {
assertTrue(CoreUtils.isLabelChange(events.iterator().next()));
assertTrue(CoreUtils.isLabelChange(events));