public void NonNumber_Characters_Throws_Exception()
{
Action invalidExecution = () => KaratsubaMultiplication.Calculate("1s", "1");
Assert.Throws <ArgumentException>(invalidExecution);
}
public void Multiply_Complex_Values(string firstNumber, string secondNumber, int expectedResult)
{
var result = KaratsubaMultiplication.Calculate(firstNumber, secondNumber);
Assert.Equal(expectedResult, result);
}