public static void AssertChessRating(TwoPlayerEloCalculator calculator,
double player1BeforeRating,
double player2BeforeRating,
PairwiseComparison player1Result,
double player1AfterRating,
double player2AfterRating)
{
var player1 = new Player(1);
var player2 = new Player(2);
var teams = Teams.Concat(
new Team(player1, new EloRating(player1BeforeRating)),
new Team(player2, new EloRating(player2BeforeRating)));
var chessGameInfo = new GameInfo(1200, 0, 200, 0, 0);
var result = calculator.CalculateNewRatings(chessGameInfo, teams,
(player1Result == PairwiseComparison.Win) ? new[] { 1, 2 } :
(player1Result == PairwiseComparison.Lose) ? new[] { 2, 1 } :
new[] { 1, 1 });
Assert.AreEqual(player1AfterRating, result[player1].Mean, ErrorTolerance);
Assert.AreEqual(player2AfterRating, result[player2].Mean, ErrorTolerance);
}
private static void TwoPlayerChessTestNotDrawn(SkillCalculator calculator)
{
// Inspired by a real bug :-)
var player1 = new Player(1);
var player2 = new Player(2);
var gameInfo = new GameInfo(1200.0, 1200.0 / 3.0, 200.0, 1200.0 / 300.0, 0.03);
var team1 = new Team(player1, new Rating(1301.0007, 42.9232));
var team2 = new Team(player2, new Rating(1188.7560, 42.5570));
var newRatings = calculator.CalculateNewRatings(gameInfo, Teams.Concat(team1, team2), 1, 2);
var player1NewRating = newRatings[player1];
AssertRating(1304.7820836053318, 42.843513887848658, player1NewRating);
var player2NewRating = newRatings[player2];
AssertRating(1185.0383099003536, 42.485604606897752, player2NewRating);
}