public void EvaluateExpression_multipleOperands_multiplicationDivision2()
        {
            double expected = 17;

            CalculatorModel.ParsingStructures.ParsingStructure p = new CalculatorModel.ParsingStructures.ParsingStructure();
            double result = p.EvaluateExpression("1+2*9-2");

            Assert.Equal(expected, result);
        }
        public void EvaluateExpression_multipleOperands()
        {
            double expected = 1;

            CalculatorModel.ParsingStructures.ParsingStructure p = new CalculatorModel.ParsingStructures.ParsingStructure();
            double result = p.EvaluateExpression("1+2-9+2+5");

            Assert.Equal(expected, result);
        }