{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true
   },
   "source": [
    "# Ruby"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## FizzBuzz"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 仕様\n",
    "+ ３で割り切れる場合は「Fizz」を出力する。\n",
    "+ ５で割り切れる場合は「Buzz」を出力する。\n",
    "+ 両者で割り切れる場合は「FizzBuzz」を出力する。\n",
    "+ 上記以外の場合は数値を返す。\n",
    "+ 指定された回数だけ繰り返し実行する。\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 設計\n",
    "#### Todo\n",
    "+ ~~Fizzを出力できるようにする~~\n",
    "+ ~~Buzzを出力できるようにする~~\n",
    "+ ~~FizzBuzzを出力できるようにする~~\n",
    "+ ~~繰り返し実行できるようにする~~\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 開発"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (<ipython-input-2-ce17789aca0e>, line 1)",
     "traceback": [
      "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-2-ce17789aca0e>\"\u001b[0;36m, line \u001b[0;32m1\u001b[0m\n\u001b[0;31m    class FizzBuzz\u001b[0m\n\u001b[0m                  ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m invalid syntax\n"
     ],
     "output_type": "error"
    }
   ],
   "source": [
    "class FizzBuzz\n",
    "  def self.generate(number)\n",
    "    value = number\n",
    "\n",
    "    if (value % 3 == 0) && (value % 5 == 0)\n",
    "      value = 'FizzBuzz'\n",
    "    elsif value % 3 == 0\n",
    "      value = 'Fizz'\n",
    "    elsif value % 5 == 0\n",
    "      value = 'Buzz'\n",
    "    end\n",
    "\n",
    "    value\n",
    "  end\n",
    "\n",
    "  def self.iterate(count)\n",
    "    array = []\n",
    "    count.times do |n|\n",
    "      n += 1\n",
    "      array.push(FizzBuzz.generate(n))\n",
    "    end\n",
    "    array\n",
    "  end\n",
    "end\n",
    "\n",
    "require 'minitest/autorun'\n",
    "class FizzBuzzSpec < Minitest::Spec\n",
    "  describe FizzBuzz do\n",
    "    it '3ならばFizzを返す' do\n",
    "      expect(FizzBuzz.generate(3)).must_equal 'Fizz'\n",
    "    end\n",
    "\n",
    "    it '9ならばFizzを返す' do\n",
    "      expect(FizzBuzz.generate(9)).must_equal 'Fizz'\n",
    "    end\n",
    "\n",
    "    it '5ならばBuzzを返す' do\n",
    "      expect(FizzBuzz.generate(5)).must_equal 'Buzz'\n",
    "    end\n",
    "\n",
    "    it '10ならばBuzzを返す' do\n",
    "      expect(FizzBuzz.generate(10)).must_equal 'Buzz'\n",
    "    end\n",
    "\n",
    "    it '50ならばBuzzを返す' do\n",
    "      expect(FizzBuzz.generate(50)).must_equal 'Buzz'\n",
    "    end\n",
    "\n",
    "    it '15ならばFizzBuzzを返す' do\n",
    "      expect(FizzBuzz.generate(15)).must_equal 'FizzBuzz'\n",
    "    end\n",
    "\n",
    "    it '30ならばFizzBuzzを返す' do\n",
    "      expect(FizzBuzz.generate(30)).must_equal 'FizzBuzz'\n",
    "    end\n",
    "\n",
    "    it '5回実行されたならば配列を返す' do\n",
    "      expect(FizzBuzz.iterate(5)).must_equal [1, 2, 'Fizz', 4, 'Buzz']\n",
    "    end\n",
    "\n",
    "    it '10回実行されたならば配列を返す' do\n",
    "      expect(FizzBuzz.iterate(10)).must_equal [1, 2, 'Fizz', 4, 'Buzz', 'Fizz', 7, 8, 'Fizz', 'Buzz']\n",
    "    end\n",
    "  end\n",
    "end\n"
   ]
  }
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