public void SimpleInput() { string op = calc.GetOperator(calc.ParseInput("5+5")); Assert.AreEqual("+", op); op = calc.GetOperator(calc.ParseInput("5-5")); Assert.AreEqual("-", op); op = calc.GetOperator(calc.ParseInput("5*5")); Assert.AreEqual("*", op); op = calc.GetOperator(calc.ParseInput("5/5")); Assert.AreEqual("/", op); }