### Question:
Conditions { public static boolean verifyInstances(final Instance[] instances) { if ((instances == null) || (instances.length == 0)) { return false; } for (final Instance instance : instances) { if (!verifyInstance(instance)) { return false; } } return true; }  static boolean verifyInstance(final Instance instance); static boolean verifyInstances(final Instance[] instances); static boolean verifyInstances(final Collection<Instance> instances); static boolean verifyService(final Service service); static boolean verifyServices(final Collection<Service> services);  }### Answer:
@Test public void verifyInstances() { { final Instance[] instances = new Instance[]{Instances.newInstance(), new Instance()}; Assert.assertFalse(Conditions.verifyInstances(instances)); Assert.assertFalse(Conditions.verifyInstances(Lists.newArrayList(instances))); } { final Instance[] instances = new Instance[]{Instances.newInstance()}; Assert.assertTrue(Conditions.verifyInstances(instances)); Assert.assertTrue(Conditions.verifyInstances(Lists.newArrayList(instances))); } }