public void Calculate_ShouldReturnCorrectAppId_WhenValidAumid(string aumid, string appId)
{
var result = AppIdCalculator.Calculate(aumid);
Assert.Equal(appId, result);
}
public void Calculate_ShouldThrowArgumentException_WhenNullOrEmpty(string aumid)
{
Assert.Throws <ArgumentException>(() => AppIdCalculator.Calculate(aumid));
}