require 'test/unit'

class Score
    attr_reader :score1
    attr_reader :score2

    attr_reader :draw
    attr_reader :win1
    attr_reader :win2

    def initialize(score1 = nil, score2 = nil)
        @score1, @score2 = score1, score2

        @draw = score1 == score2
        @win2 = !@win1 = score1 > score2
    end
end

def compare(score1, score2)
    if score1.score1 == score2.score1 && score1.score2 == score2.score2
        2
    elsif (score1.draw && score2.draw) || (score1.win1 == score2.win1 && score1.win2 == score2.win2)
        1
    else
        0
    end
end

class ScoreTest < Test::Unit::TestCase
    def test_exact_score
        user_score = Score.new(4,1)
        sys_score = Score.new(4,1)

        assert_equal(2, compare(user_score, sys_score))
    end

    def test_draw
        user_score = Score.new(2,2)
        sys_score = Score.new(1,1)

        assert_equal(1, compare(user_score, sys_score))
    end

    def test_win_team
        user_score = Score.new(4,1)
        sys_score = Score.new(5,1)

        assert_equal(1, compare(user_score, sys_score))
    end

    def test_lose
        user_score = Score.new(3,1)
        sys_score = Score.new(5,7)

        assert_equal(0, compare(user_score, sys_score))
    end
end