/// <summary>
/// Action after pressing the operation button which requires only one operand
/// </summary>
/// <param name="operation">Selected operation</param>
public void one_operand_btn_click(string operation)
{
if (display.Text != "Chyba!")
{
try
{
switch (operation)
{
case "!":
if (display.Text.Length != 0)
{
show_number(Math.Fact(dispString_to_numb(display.Text)));
insert_mode = false;
}
break;
default:
break;
}
}
catch (Exception)
{
display.Text = "Chyba!";
return;
}
}
}
public void FactTest()
{
Assert.AreEqual((ulong)720, math.Fact(6));
Assert.AreEqual((ulong)3628800, math.Fact(10));
Assert.AreEqual((ulong)1, math.Fact(1));
Assert.AreEqual((ulong)1, math.Fact(0));
/// <summary> NaN result</summary>
string noFailMessage = "No exception message when result was NaN.";
try
{
math.Fact(-1);
Assert.Fail(noFailMessage);
}
catch (Exception)
{
}
}