public void FactoriseReturnsTwoAndOtherFactorWhenNumberIsEven(int evenNumber)
{
Factoriser factoriser = new Factoriser();
(int, int)factors = factoriser.factorise(evenNumber);
Assert.Equal(factors, (2, evenNumber / 2));
}
public void FactoriseReturnsErrorWhenLessThanTwo(int numberLessThanTwo)
{
Factoriser factoriser = new Factoriser();
Action act = () => factoriser.factorise(numberLessThanTwo);
Assert.Throws <ArgumentException>(act);
}