78 lines
2.4 KiB
Elixir
78 lines
2.4 KiB
Elixir
defmodule GlickoTest do
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use ExUnit.Case
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alias Glicko.{
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Player,
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Result
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}
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doctest Glicko
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@player [rating: 1500, rating_deviation: 200] |> Player.new_v1() |> Player.to_v2()
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@results [
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Result.new(Player.new_v1(rating: 1400, rating_deviation: 30), :win),
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Result.new(Player.new_v1(rating: 1550, rating_deviation: 100), :loss),
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Result.new(Player.new_v1(rating: 1700, rating_deviation: 300), :loss)
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]
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@valid_player_rating_after_results 1464.06 |> Player.scale_rating_to(:v2)
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@valid_player_rating_deviation_after_results 151.52 |> Player.scale_rating_deviation_to(:v2)
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@valid_player_volatility_after_results 0.05999
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@valid_player_rating_deviation_after_no_results 200.2714
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|> Player.scale_rating_deviation_to(:v2)
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describe "new rating" do
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test "with results" do
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player = Glicko.new_rating(@player, @results, system_constant: 0.5)
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assert_in_delta Player.rating(player), @valid_player_rating_after_results, 1.0e-4
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assert_in_delta Player.rating_deviation(player),
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@valid_player_rating_deviation_after_results,
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1.0e-4
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assert_in_delta Player.volatility(player), @valid_player_volatility_after_results, 1.0e-5
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end
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test "no results" do
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player = Glicko.new_rating(@player, [])
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assert_in_delta Player.rating_deviation(player),
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@valid_player_rating_deviation_after_no_results,
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1.0e-4
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end
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end
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describe "win probability" do
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test "with same ratings" do
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assert Glicko.win_probability(Player.new_v1(), Player.new_v1()) == 0.5
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end
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test "with better opponent" do
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assert Glicko.win_probability(Player.new_v1(rating: 1500), Player.new_v1(rating: 1600)) <
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0.5
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end
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test "with better player" do
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assert Glicko.win_probability(Player.new_v1(rating: 1600), Player.new_v1(rating: 1500)) >
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0.5
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end
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end
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describe "draw probability" do
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test "with same ratings" do
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assert Glicko.draw_probability(Player.new_v1(), Player.new_v1()) == 1
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end
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test "with better opponent" do
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assert Glicko.draw_probability(Player.new_v1(rating: 1500), Player.new_v1(rating: 1600)) < 1
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end
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test "with better player" do
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assert Glicko.draw_probability(Player.new_v1(rating: 1600), Player.new_v1(rating: 1500)) < 1
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end
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end
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end
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