public void TestGetPrecedenceForBinary()
        {
            var op = new SubtractOperator();

            Assert.AreEqual(OperatorPrecedence.Subtract, op.GetPrecedence(new Token("1", 1)));
        }
        public void TestGetPrecedenceForUnary()
        {
            var op = new SubtractOperator();

            Assert.AreEqual(OperatorPrecedence.UnaryMinus, op.GetPrecedence(null));
        }