static void Main(string[] args)
{
Console.WriteLine("Which stack option do you want: \"0\" = List, \"1\" = Array");
int choice = Convert.ToInt32(Console.ReadLine());
IStack stack;
if (choice == 0)
{
stack = new StackAsList();
}
else if (choice == 1)
{
stack = new StackAsArray();
}
else
{
throw new Exception("Please, enter right value!");
}
var calculator = new Calculator(stack);
while (true)
{
Console.WriteLine("Enter postfix expression to calculate. ");
string expression = Console.ReadLine();
Console.WriteLine($"Result: {calculator.CalculateExpressionValue(expression)}");
}
}
public void CalculateWithEmptyStringTest(Calculator calculator)
{
try
{
string inputStr = "";
calculator.CalculateExpressionValue(inputStr);
}
catch (Exception exception)
{
Assert.AreEqual("incorrect expression", exception.Message);
}
}
public void CalculateWithinvalidСharacterTest(Calculator calculator)
{
try
{
string inputStr = "23 yu *";
calculator.CalculateExpressionValue(inputStr);
}
catch (Exception exception)
{
Assert.AreEqual("unknown character", exception.Message);
}
}
public void CalculateWithExtraCharacter2Test(Calculator calculator)
{
try
{
string inputStr = "23 56 / 45";
calculator.CalculateExpressionValue(inputStr);
}
catch (Exception exception)
{
Assert.AreEqual("extra value", exception.Message);
}
}
public void CalculateWithCorrectExpression2Test(Calculator calculator)
{
string inputStr = "100 100 /";
Assert.AreEqual((1, true), calculator.CalculateExpressionValue(inputStr));
}
