#!/usr/bin/env ruby -w

require_relative 'glicko2'
require 'test/unit'

class TestGlicko2 < Test::Unit::TestCase

  def test_simple
    a = Glicko2.new(1500.0, 200.0, 0.06)
    b = Glicko2.new(1400.0,  30.0, 0.06)
    c = Glicko2.new(1550.0, 100.0, 0.06)
    d = Glicko2.new(1700.0, 300.0, 0.06)

    a.add_win(b)
    a.add_loss(c)
    a.add_result(d,0.0)

    assert_equal(1500.0, a.rating)
    assert_equal(200.0, a.deviation)

    a.update()

    assert_in_delta(1464.05,a.rating,0.01)
    assert_in_delta(151.516,a.deviation,0.01)

    a.update()

    assert_in_delta(1464.05,a.rating,0.01)
    assert_in_delta(151.875,a.deviation,0.01)

  end

end