/// <summary>
///
/// </summary>
/// <param name="playerA">Player 'A' of Match</param>
/// <param name="playerB">Player 'B' of Match</param>
/// <param name="outCome">The outcome of the match either win, loss or draw</param>
/// <returns>New ratings for both players</returns>
public NewRatings Calculate(CurrentPlayerRating playerA, CurrentPlayerRating playerB, MatchOutcome outCome)
{
PlayerRatingCalculator calculator = new PlayerRatingCalculator();
int playerAExpectedOutcome = calculator.CalculateExpectedOutcome(playerA.Rating, playerB.Rating);
int playerBExpectedOutcome = calculator.CalculateExpectedOutcome(playerB.Rating, playerA.Rating);
decimal playerAOutcome = 0;
switch (outCome)
{
case MatchOutcome.PlayerAWin:
playerAOutcome = 1;
break;
case MatchOutcome.Draw:
playerAOutcome = 0.5M;
break;
case MatchOutcome.PlayerBWin:
playerAOutcome = 0;
break;
}
decimal playerBOutcome = 0;
switch (outCome)
{
case MatchOutcome.PlayerAWin:
playerBOutcome = 0;
break;
case MatchOutcome.Draw:
playerBOutcome = 0.5M;
break;
case MatchOutcome.PlayerBWin:
playerBOutcome = 1;
break;
}
var newPLayerRatingA = new NewlayerRatingsDefault()
{
PlayerId = "A", Rating = calculator.CalculateNewRating(playerA.Rating, _maximumRatingChange, playerAExpectedOutcome, playerAOutcome)
};
var newPLayerRatingB = new NewlayerRatingsDefault()
{
PlayerId = "B", Rating = calculator.CalculateNewRating(playerB.Rating, _maximumRatingChange, playerBExpectedOutcome, playerBOutcome)
};
return(new NewRatingsDefault {
PlayerA = newPLayerRatingA, PlayerB = newPLayerRatingB
});
}
public void CalculateNewPlayerRating(int currentRating, int maximumRatingChange, int expectedOutcome, decimal outcome, int newRating)
{
var calculator = new PlayerRatingCalculator();
var result = calculator.CalculateNewRating(currentRating, maximumRatingChange, expectedOutcome, outcome);
Assert.Equal(newRating, result);
}
public void CalculateExpectedOutcome(int result, int playerA, int playerB)
{
var calculator = new PlayerRatingCalculator();
Assert.Equal(result, calculator.CalculateExpectedOutcome(playerA, playerB));
}
