public void ShouldCalculateProperly()
{
var calc = new Calculator.Calculator();
Assert.AreEqual(0, calc.getResult());
calc.executeOperation("+", new int[] {7 });
Assert.AreEqual(7, calc.getResult());
calc.executeOperation("-", new int[] { 15 });
Assert.AreEqual(-8, calc.getResult());
}
static void Main(string[] args)
{
var calc = new Calculator();
Console.WriteLine("Input your operations: operator first, then operands, divided by whitespace");
Console.WriteLine("Avialable operations are:");
foreach (var op in calc.getAvialableOperators())
Console.WriteLine(" " + op);
Console.WriteLine("For exit - type \"quit\"");
Console.WriteLine("\nCurrent result = " + calc.getResult());
CalculatorOperation operation;
while (true)
{
operation = parseCalculatorOperation(Console.ReadLine());
if (operation.opName.Equals("quit"))
{
Console.WriteLine("\nBye-bye!");
break;
}
calc.executeOperation(operation.opName, operation.operands);
Console.WriteLine("Current result = " + calc.getResult());
}
Console.ReadKey();
}
public void ShouldThrowOnUnknownOperator()
{
try
{
var calc = new Calculator.Calculator();
calc.executeOperation("*", new int[] { 2 });
}
catch (Exception exc)
{
Assert.AreEqual("Operator \"*\" unknown!\r\nParameter name: operatorName", exc.Message);
}
}
public void ShouldThrowOnNullOperandsForNonNullOperator()
{
try
{
var calc = new Calculator.Calculator();
calc.executeOperation("+", null);
}
catch (Exception exc)
{
Assert.AreEqual("Operator \"+\" requires non-empty operands list!\r\nParameter name: operands", exc.Message);
}
}
public void ShouldThrowOnInsufficientOperandsNumber()
{
try
{
var calc = new Calculator.Calculator();
calc.executeOperation("+", new int[] { });
}
catch (Exception exc)
{
Assert.AreEqual("operands\r\nParameter name: Operator \"+\" requires 1operands, while only 0 presented!", exc.Message);
}
}
