Assert.assertNull(grantToken.getClient()); HeldLocksToken validToken = server.useGrant(client2, grantToken); Assert.assertNotNull(validToken); Assert.assertEquals(client2, validToken.getClient()); Assert.assertNull(grantToken.getClient()); validToken = server.useGrant(client2, grantToken.getGrantId()); Assert.assertNotNull(validToken); Assert.assertEquals(client2, validToken.getClient());