public void test_ofSignedAmount() { assertEquals(PayReceive.ofSignedAmount(-1d), PayReceive.PAY); assertEquals(PayReceive.ofSignedAmount(-0d), PayReceive.PAY); assertEquals(PayReceive.ofSignedAmount(0d), PayReceive.RECEIVE); assertEquals(PayReceive.ofSignedAmount(+0d), PayReceive.RECEIVE); assertEquals(PayReceive.ofSignedAmount(1d), PayReceive.RECEIVE); }