Subscriptions { @Experimental public static Subscription unsubscribed() { return UNSUBSCRIBED; } private  Subscriptions(); static Subscription empty(); @Experimental static Subscription unsubscribed(); static Subscription create(final Action0 unsubscribe); static Subscription from(final Future<?> f); static CompositeSubscription from(Subscription... subscriptions);  }
@Test public void testUnsubscribed() { Subscription unsubscribed = Subscriptions.unsubscribed(); assertTrue(unsubscribed.isUnsubscribed()); }