mirror of
https://github.com/avitex/elixir-glicko
synced 2024-11-13 23:19:57 +00:00
69 lines
2.1 KiB
Elixir
69 lines
2.1 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 |> 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), @valid_player_rating_deviation_after_results, 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), @valid_player_rating_deviation_after_no_results, 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])) < 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])) > 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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