public void PickWinner_UsesUniformDistribution(double[] odds)
{
var race = new Race();
foreach (var odd in odds)
{
race.AddParticipant(new Participant(odd.ToString(), odd));
}
var winsCounts = odds.ToDictionary(el => el.ToString(), el => 0);
foreach (var index in Enumerable.Range(1, 1000000))
{
var winner = race.DoRace();
winsCounts[winner.Name]++;
}
var totalMargin = MarginCalculator.Calculate(odds);
foreach (var odd in odds)
{
var finalWinningPercentage = winsCounts[odd.ToString()] / 10000D;
var expectedPercentage = odd.ToPercentageOdds() / totalMargin * 100D;
Assert.LessOrEqual(Math.Abs(finalWinningPercentage - expectedPercentage), 2D);
}
}
public double Calculate_ReturnsCorrectTotalMargin(double[] odds)
{
return(MarginCalculator.Calculate(odds));
}