#minatork01 pink-one(sakurai & koshiba)

gistfile1.rb

# -*- coding: utf-8
require 'pry'

class Fixnum
  def numerals
    if self < 20
      case self
      when 0
        'zero'
      when 1         
        'one'
      when 2         
        'two'
      when 3         
        'three'
      when 4         
        'four'
      when 5         
        'five'
      when 6         
        'six'
      when 7         
        'seven'
      when 8         
        'eight'
      when 9
        'nine'
      when 10
        'ten'
      end
    else
      case
      when self < 30
        fuga('twenty', 20)
      when self < 40
        fuga('thirty', 30)
      when self >= 100 && self < 1000
        hyaku = (self / 100).to_i;
        result = hyaku.numerals + '-hundred'
        result += ' ' + (self - hyaku * 100).numerals unless self % 100 == 0
        result
      when self >= 1000
        hyaku = (self / 1000).to_i;
        result = hyaku.numerals + '-thousand'
        result += ' ' + (self - hyaku * 1000).numerals unless self % 1000 == 0
        result
      end
    end
  end
  
  def fuga(string, number)
    result = ''
    result += string
    hoge  = self - number
    result += '-' + hoge.numerals unless hoge == 0
    result
  end
end

describe 'Numerals' do
  before :all do
     
  end

  context '決め打ち' do
    it '0' do
      0.numerals.should == 'zero'
    end

    it '1' do
      1.numerals.should == 'one'
    end

    it '2' do
      2.numerals.should == 'two'
    end

    it '3' do
      3.numerals.should == 'three'
    end

    it '4' do
      4.numerals.should == 'four'
    end

    it '5' do
      5.numerals.should == 'five'
    end

    it '6' do
      6.numerals.should == 'six'
    end

    it '7' do
      7.numerals.should == 'seven'
    end

    it '8' do
      8.numerals.should == 'eight'
    end

    it '9' do
      9.numerals.should == 'nine'
    end

    it '10' do
      10.numerals.should == 'ten'
    end

    it '20' do
      20.numerals.should == 'twenty'
    end  
  
  end
  
  context "ロジックで求める" do
    it '21' do
      21.numerals.should == 'twenty-one'
    end  

    it '31' do
      31.numerals.should == 'thirty-one'
    end  

    it 100 do
      100.numerals.should == 'one-hundred'
    end  

    it 121 do
      121.numerals.should == 'one-hundred twenty-one'
    end  

    it 130 do
      121.numerals.should == 'one-hundred twenty-one'
    end  

    it 200 do
      200.numerals.should == 'two-hundred'
    end  

    it 1000 do
      1000.numerals.should == 'one-thousand'
    end

    it 1231 do
      1231.numerals.should == 'one-thousand two-hundred thirty-one'
    end

    it 2000 do
      1000.numerals.should == 'one-thousand'
    end

  end
end