public virtual void test_inverse_same()
        {
            FxRate test = FxRate.of(GBP, GBP, 1d);

            assertEquals(test.inverse(), FxRate.of(GBP, GBP, 1d));
        }
        //-------------------------------------------------------------------------
        public virtual void test_inverse()
        {
            FxRate test = FxRate.of(GBP, USD, 1.25d);

            assertEquals(test.inverse(), FxRate.of(USD, GBP, 0.8d));
        }