long start = System.nanoTime();
st1.reschedule(10, TimeUnit.MILLISECONDS);
assertFalse("Check that task hasn't run yet", ran > 0);
ses.shutdown();
ses.awaitTermination(5, TimeUnit.SECONDS);
assertEquals("Check that task ran", 1, ran);
assertTrue("Check that time passed appropriately",
(time - start) >= TimeUnit.NANOSECONDS.convert(10, TimeUnit.MILLISECONDS));
}