Assert.assertEquals(request.getLockDescriptors(), grant.getLocks()); Thread.sleep(51); Assert.assertTrue(grant.getExpirationDateMs() - System.currentTimeMillis() < 450); grant = server.refreshGrant(grant); Assert.assertTrue(grant.getExpirationDateMs() - System.currentTimeMillis() < 500); nullToken = server.lockWithFullLockResponse(LockClient.ANONYMOUS, request).getToken(); Assert.assertNull(nullToken);