Merge pull request #87 from koei1025/TraditionalChinese-

add new language: Traditional Chinese

README.markdown

@@ -96,6 +96,7 @@ Currently supported locales:
 * Malaysia `:ms`
 * Japanese `:jp`
 * Vietnamese `:vi`
+* Traditional Chinese `:zh-tw`
 
 ## Testing
 

lib/humanize.rb

@@ -38,6 +38,8 @@ def self.for_locale(locale)
       [Humanize::Tr, SPACE]
     when :jp
       [Humanize::Jp, EMPTY]
+    when :'zh-tw'
+      [Humanize::ZhTw, EMPTY]
     when :'fr-CH'
       [Humanize::FrCh, SPACE]
     else

lib/humanize/locales.rb

@@ -1,5 +1,5 @@
 module Humanize
-  %w[az de en es fr fr_ch id ms pt ru th tr jp vi].each do |locale|
+  %w[az de en es fr fr_ch id ms pt ru th tr jp vi zh_tw].each do |locale|
     autoload locale.split('_').map(&:capitalize).join.to_sym, "humanize/locales/#{locale}.rb"
   end
 end

lib/humanize/locales/zh_tw.rb

@@ -0,0 +1,30 @@
+require_relative 'constants/zh_tw'
+
+module Humanize
+  class ZhTw
+    def humanize(number)
+      iteration = 0
+      parts = []
+      until number.zero?
+        number, remainder = number.divmod(10_000)
+        unless remainder.zero?
+          add_grouping(parts, iteration)
+          parts << SUB_ONE_GROUPING[remainder]
+        end
+
+        iteration += 1
+      end
+
+      parts
+    end
+
+    private
+
+    def add_grouping(parts, iteration)
+      grouping = LOTS[iteration]
+      return unless grouping
+
+      parts << grouping.to_s
+    end
+  end
+end

spec/locales/zh_tw_spec.rb

@@ -0,0 +1,55 @@
+require 'spec_helper'
+
+RSpec.describe Humanize, 'zh tw locale' do
+  before do
+    Humanize.configure do |config|
+      config.default_locale = :'zh-tw'
+    end
+  end
+
+  tests = [
+    [1, '壹'],
+    [48, '肆拾捌'],
+    [100, '佰'],
+    [101, '佰壹'],
+    [110, '佰拾'],
+    [199, '佰玖拾玖'],
+    [999, '玖佰玖拾玖'],
+    [1000, '壹仟'],
+    [3456, '参仟肆佰伍拾陸'],
+    [9999, '玖仟玖佰玖拾玖'],
+    [21_111, '貳萬壹仟佰拾壹'],
+    [99_999, '玖萬玖仟玖佰玖拾玖'],
+    [9_876_543, '玖佰捌拾柒萬陸仟伍佰肆拾参'],
+    [10_000_000, '壹仟萬'],
+    [100_000_000, '壹億'],
+    [765_432_109, '柒億陸仟伍佰肆拾参萬貳仟佰玖'],
+    [-123_422_223.48_948_753, '負壹億貳仟参佰肆拾貳萬貳仟貳佰貳拾参・肆捌玖肆捌捌']
+  ]
+
+  tests.each do |num, output|
+    it "#{num} equals #{output}" do
+      expect(num.humanize).to eql(output)
+    end
+  end
+
+  context 'decimals: number' do
+    it 'returns the decimals as whole numbers' do
+      num = 8.1592
+      expect(num.humanize).to eq('捌・壹伍玖貳')
+      expect(num.humanize(decimals_as: :number)).to eq('捌・壹仟伍佰玖拾貳')
+    end
+  end
+
+  describe 'when called on conceptual number' do
+    it 'reads correctly' do
+      inf = Float::INFINITY
+      neg_inf = -inf
+      nan = inf + neg_inf
+
+      expect(inf.humanize).to eql('無限大')
+      expect(neg_inf.humanize).to eql('負無限大')
+      expect(nan.humanize).to eql('未定義')
+    end
+  end
+end