### Question:
Epoll { public static boolean isAvailable() { return UNAVAILABILITY_CAUSE == null; } private  Epoll(); static boolean isAvailable(); static void ensureAvailability(); static Throwable unavailabilityCause();  }### Answer:
@Test public void testIsAvailable() { assertTrue(Epoll.isAvailable()); }
@Test public void testIsAvailable() { Assert.assertTrue(Epoll.isAvailable()); }