Exercism Ruby - High Scores

Manage a game player's High Score list.

Your task is to build a high-score component of the classic Frogger game, one of the highest selling and addictive games of all time, and a classic of the arcade era. Your task is to write methods that return the highest score from the list, the last added score and the three highest scores.

require 'minitest/autorun'
require_relative 'high_scores'

# Common test data version: 5.0.0 7dfb96c
class HighScoresTest < Minitest::Test
  def test_list_of_scores
    # skip
    scores = [30, 50, 20, 70]
    expected = [30, 50, 20, 70]
    assert_equal expected, HighScores.new(scores).scores
  end

  def test_latest_score
    skip
    scores = [100, 0, 90, 30]
    expected = 30
    assert_equal expected, HighScores.new(scores).latest
  end

  def test_personal_best
    skip
    scores = [40, 100, 70]
    expected = 100
    assert_equal expected, HighScores.new(scores).personal_best
  end

  def test_personal_top_three_from_a_list_of_scores
    skip
    scores = [10, 30, 90, 30, 100, 20, 10, 0, 30, 40, 40, 70, 70]
    expected = [100, 90, 70]
    assert_equal expected, HighScores.new(scores).personal_top_three
  end

  def test_personal_top_highest_to_lowest
    skip
    scores = [20, 10, 30]
    expected = [30, 20, 10]
    assert_equal expected, HighScores.new(scores).personal_top_three
  end

  def test_personal_top_when_there_is_a_tie
    skip
    scores = [40, 20, 40, 30]
    expected = [40, 40, 30]
    assert_equal expected, HighScores.new(scores).personal_top_three
  end

  def test_personal_top_when_there_are_less_than_3
    skip
    scores = [30, 70]
    expected = [70, 30]
    assert_equal expected, HighScores.new(scores).personal_top_three
  end

  def test_personal_top_when_there_is_only_one
    skip
    scores = [40]
    expected = [40]
    assert_equal expected, HighScores.new(scores).personal_top_three
  end

  def test_latest_score_is_not_the_personal_best
    skip
    scores = [100, 40, 10, 70]
    refute HighScores.new(scores).latest_is_personal_best?
  end

  def test_latest_score_is_the_personal_best
    skip
    scores = [70, 40, 10, 100]
    assert HighScores.new(scores).latest_is_personal_best?
  end
end

My answer was:

class HighScores
  attr_reader :scores

  def initialize scores
    @scores = scores
  end

  def latest
    scores.last
  end

  def personal_best
    scores.max
  end

  def personal_top_three
    @scores.sort.reverse.take(3)
  end

  def latest_is_personal_best?
    latest == personal_best
  end
end

I learned about attr_reader, attr_writer and attr_accessor.

attr_reader: It generates a getter method

attr_writer: It generates a setter method

attr_accessor: It generates a setter and getter method