@Test
public void hasASetOfGauges() {

    assertThat(gauges.getMetrics().keySet())
        .containsOnly("terminated.count",
            "new.count",
            "count",
            "timed_waiting.count",
            "deadlocks",
            "blocked.count",
            "waiting.count",
            "daemon.count",
            "runnable.count",
            "deadlock.count",
            "total_started.count",
            "peak.count");
}