public void TestToString()
        {
            IDifference result     = BondOrderDifference.Construct("Foo", BondOrder.Unset, BondOrder.Single);
            string      diffString = result.ToString();

            Assert.IsNotNull(diffString);
            AssertOneLiner(diffString);
        }
        public void TestOneNull()
        {
            IDifference result = BondOrderDifference.Construct("Foo", BondOrder.Unset, BondOrder.Single);

            Assert.IsNotNull(result);

            result = BondOrderDifference.Construct("Foo", BondOrder.Single, BondOrder.Unset);
            Assert.IsNotNull(result);
        }
        public void TestTwoNull()
        {
            IDifference result = BondOrderDifference.Construct("Foo", BondOrder.Unset, BondOrder.Unset);

            Assert.IsNull(result);
        }
        public void TestSame()
        {
            IDifference result = BondOrderDifference.Construct("Foo", BondOrder.Single, BondOrder.Single);

            Assert.IsNull(result);
        }