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Rails/konachaでJavaScriptのテスト環境とCI環境を作ってTravisに載せた

Last updated at Posted at 2013-03-21

fastladderのリポジトリにJavaScriptのテスト環境を足してみた。その作業ログ。

具体的には以下の二つのコミット参照
https://github.com/fastladder/fastladder/pull/66/files
https://github.com/fastladder/fastladder/pull/85/files

後この記事
http://qiita.com/items/861f913b0f57203420d6

利点

  • mocha/chaiによるモダンなJSテスト環境
  • テスト側でも依存解決にsprockets利用可
  • 導入が簡単

欠点

  • ヘッドレス環境でCI統合がちょっとめんどい
  • javascript処理系が必要なのでJSエンジンが必要(PureなCentOSとかだとtherubyracerが必要)

導入

Gemfileに以下のものを追加する

group :test, :development do
  gem 'konacha'
  gem 'poltergeist'
  gem 'sinon-rails'
end 

sinon-railsはJSのモックライブラリ。なくてもいいけど、rspec書く人は入れたほうがいいと思う。

とりあえず一件だけテストを書く。
spec/javascripts/array_extra_spec.js

//= require application
//= sinon
describe("Array", function(){
  describe("#map", function(){
    it("return function applied array", function() {
      var arr = [1,2,3];
      var twice = function(i){return i*2;};
      expect(arr.map(twice)).deep.equal([2,4,6]);
    });
  });
});

Runnerを起動

bundle exec rake konacha:serve

http://localhost:3500 を開くとテストが実行される。

CI環境

poltergeistでヘッドレス実行できるようにする。
config/initializers/konacha.rb

Konacha.configure do |config|
  require 'capybara/poltergeist'
  config.spec_dir = "spec/javascripts"
  config.driver   = :poltergeist
end if defined?(Konacha)

WebMockがそのままだpoltergeistの邪魔をするのでlocalhostへの接続を許可する
config/environments /test.rb

+require 'webmock/rspec'
 Fastladder::Application.configure do
   # Settings specified here will take precedence over those in config/application.rb
   
   (...)

   # Print deprecation notices to the stderr
   config.active_support.deprecation = :stderr
+  WebMock.disable_net_connect!(:allow_localhost => true)
 end
+
+require 'webmock/rspec'
+WebMock.disable_net_connect!(:allow_localhost => true) 

実行

bundle exec rake konacha:run

productionのprecompile後に落ちる場合はコンパイル対象を列挙する
config/environments/production.rb の例

  +config.assets.precompile += %w( reader.js share.js subscribe.js)

Travis

travis.ymlのサンプル

rvm:
- 1.9.3
- 2.0.0
branches:
  only:
    - master
before_script:
  - 'cp config/database.yml.sqlite3 config/database.yml'
  - 'RAILS_ENV=test bundle exec rake setup'
  - "export DISPLAY=:99.0"
  - "sh -e /etc/init.d/xvfb start"
script: 'RAILS_ENV=test bundle exec rake db:drop db:create db:migrate spec konacha:run && RAILS_ENV=production bundle exec rake assets:precompile '
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