public void TestFail()
{
string expr = "1,2,3,+,-";//2,2,+,3,-,2,+";
RPN rpn = new RPN();
Assert.AreEqual(-4, rpn.calculate(expr));
}
public void TestCalculate()
{
string expr = "2,2,+,3,-";
RPN rpn = new RPN();
Assert.AreEqual(12, rpn.calculate(expr));
}
public void TestPerformoperation()
{
RPN rpn = new RPN();
string operators = "*";
string operand1 = "3";
string operand2 = "6";
Assert.AreEqual(18, rpn.PerformOperation(operators, operand1, operand2));
}
public void TestStringForCommas()
{
try
{
RPN rpn = new RPN();
string expr = "2,2*";
Assert.Ignore(rpn.calculate(expr).ToString());
}
catch (Exception exp)
{
Assert.AreEqual("Expression should have at least two commas", exp.Message);
}
}
public void TestStack()
{
RPN rpn = new RPN();
string expr = "2,2,*,5";
string[] exprArray = new string[expr.Length];
exprArray = expr.Split(',');
string[] exprArrayReverse = exprArray.Reverse().ToArray();
Stack <string> stack = rpn.GetStackFromArray(exprArray);
string[] exprArrayReverse2 = stack.ToArray();
Assert.AreEqual(exprArrayReverse2, exprArrayReverse);
}
private void btnEvaluate_Click(object sender, RoutedEventArgs e)
{
RPN rpn = new RPN(txtlInput.Text);
try
{
txtAnswer.Text = rpn.CalculateExpression().ToString();
}
catch (System.Exception ex)
{
if (ex is System.InvalidCastException)
{
txtAnswer.Text = ex.Message;
}
if (ex is System.InvalidOperationException)
{
txtAnswer.Text = ex.Message;
}
if (ex is System.DivideByZeroException)
{
txtAnswer.Text = ex.Message;
}
}
}
public void ThenTheResultShouldBeOnTheScreen(int p0)
{
RPN obj = new RPN();
Assert.AreEqual(p0, obj.calculate(expression));
}
static void Main(string[] args)
{
RPN rpn = new RPN();
rpn.calculate("2,2,+");
}
