@Test
    public void shouldRunProcess1Time() {
        final AtomicInteger ping = new AtomicInteger(0);
        TimeUtil.clock(1, ping::incrementAndGet);

        // expect 1 extra for warmup
        assertEquals(2, ping.get());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-core/src/test/java/org/apache/tinkerpop/gremlin/util/TimeUtilTest.java