public void TestSubtractingTwoPositiveNumbers()
{
decimal leftNumber = 25.0M;
decimal rightNumber = 35.0M;
decimal expected = leftNumber - rightNumber;
decimal actual = calculator.Subtract(leftNumber, rightNumber);
Assert.AreEqual(expected, actual);
}
public decimal Get([FromQuery] decimal leftNumber, [FromQuery] decimal rightNumber)
{
return(calculator.Subtract(leftNumber, rightNumber));
}
protected void ProcessOperator(string curOperator)
{
//this method is the heart of the operation
//it gets the operator
string op = curOperator;
//first it tests to see if it is a valid numerical entry
//by checking to see if the ParseTextEntry() method returns
//a true or a false
//if false than it launches a javascript alert
if (!ParseTextEntry())
{
Response.Write("<script type='Text/JavaScript'>alert('Enter only valid Numbers')</script>");
return;
}
//if it is good it writes the current operator
//to the operator session
Session["operator"] = op;
//next it checks whether there is anything in
//the answr session
//if there is it determins the operator
//and calls the appropriate method
//from the SimpleCalc class
if (Session["answr"] != null)
{
number1 = (double)Session["answr"];
Session["answr"] = null;
switch (op)
{
case "+":
answer = calc.Add(number1, number2);
break;
case "-":
answer = calc.Subtract(number1, number2);
break;
case "*":
answer = calc.Multiply(number1, number2);
break;
case "/":
answer = calc.Divide(number1, number2);
break;
default:
Response.Write("<script type='Text/JavaScript'>alert('Invalid Operator')</script>");
break;
}
//it writes the answer to the textbox
txtEntry.Text = answer.ToString();
//and clears the session
Session["answr"] = null;
}
else
{
//otherwise it writes the number from the textbox
//to the session variable
Session["answr"] = number2;
}
}