mirror of
https://github.com/avitex/elixir-glicko
synced 2025-04-18 13:49:57 +00:00
ce08ab5e24
In an effort to give names to core concepts in the library, replace the
current way of passing around tuples (of varying length and content)
with appropriately named structs.
As a consequence of creating `Player.{V1, V2}` and `Result`, a variety
of functions that extracted values out of the tuples have either been
removed or changed to access struct fields instead.
78 lines
2.3 KiB
Elixir
78 lines
2.3 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 %Player.V1{rating: 1500, rating_deviation: 200} |> Player.to_v2()
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@results [
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Result.new(%Player.V1{rating: 1400, rating_deviation: 30}, :win),
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Result.new(%Player.V1{rating: 1550, rating_deviation: 100}, :loss),
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Result.new(%Player.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.V1{}, %Player.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.V1{rating: 1500}, %Player.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.V1{rating: 1600}, %Player.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.V1{}, %Player.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.V1{rating: 1500}, %Player.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.V1{rating: 1600}, %Player.V1{rating: 1500}) < 1
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end
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end
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end
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