Ruby on Rails チュートリアル 第３章をやったメモ

Ruby on Rails Cloud9

Ruby on Rails チュートリアル：実例を使って Rails を学ぼうのRails 5.1（第4版）

３章は静的なページの作成。 環境はCloud9。

3.3.1の rails testでエラーが出る

$ rails test
Running via Spring preloader in process 10517
/home/ec2-user/environment/sample_app/db/schema.rb doesn't exist yet. Run `rails db:migrate` to create it, then try again. If you do not intend to use a database, you should instead alter /home/ec2-user/environment/sample_app/config/application.rb to limit the frameworks that will be loaded.
Run options: --seed 26662

# Running:

..

Finished in 0.287327s, 6.9607 runs/s, 6.9607 assertions/s.
2 runs, 2 assertions, 0 failures, 0 errors, 0 skips
/usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/tmux/client.rb:12:in `version': undefined method `[]' for nil:NilClass (NoMethodError)
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/tmux.rb:69:in `_check_available'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/base.rb:59:in `initialize'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:100:in `new'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:100:in `_add'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:62:in `block (2 levels) in detect'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:60:in `each'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:60:in `detect'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:60:in `block in detect'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:59:in `each'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier/detected.rb:59:in `detect'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier.rb:180:in `_detect_or_add_notifiers'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier.rb:198:in `_activate'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier.rb:87:in `initialize'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier.rb:42:in `new'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/notiffany-0.1.1/lib/notiffany/notifier.rb:42:in `connect'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/guard-2.13.0/lib/guard/notifier.rb:11:in `connect'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/guard-2.13.0/lib/guard/notifier.rb:31:in `notify'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/guard-compat-1.2.1/lib/guard/compat/plugin.rb:113:in `notify'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/guard-minitest-2.4.4/lib/guard/minitest/notifier.rb:31:in `notify'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/guard-minitest-2.4.4/lib/guard/minitest/reporter.rb:10:in `report'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/minitest-5.10.3/lib/minitest.rb:687:in `each'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/minitest-5.10.3/lib/minitest.rb:687:in `report'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/minitest-5.10.3/lib/minitest.rb:141:in `run'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/railties-5.1.2/lib/rails/test_unit/minitest_plugin.rb:77:in `run'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/minitest-5.10.3/lib/minitest.rb:63:in `block in autorun'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/application.rb:171:in `fork'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/application.rb:171:in `serve'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/application.rb:141:in `block in run'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/application.rb:135:in `loop'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/application.rb:135:in `run'
        from /usr/local/rvm/gems/ruby-2.4.1/gems/spring-2.0.2/lib/spring/application/boot.rb:19:in `<top (required)>'
        from /usr/local/rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from /usr/local/rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
        from -e:1:in `<main>'

上のほうのは rails db:migrateで消えた。下のほうのtmuxがどうのこうのは良くわからないけどtmuxを入れると消えた。

$ sudo yum install -y tmux

$ rails test
Running via Spring preloader in process 11348
Run options: --seed 46743

# Running:

..

Finished in 0.258416s, 7.7395 runs/s, 7.7395 assertions/s.
2 runs, 2 assertions, 0 failures, 0 errors, 0 skips

チュートリアルのテスト結果は2 tests, 2 assertions, 0 failures, 0 errors, 0 skipsとなっていますが、2 runsに変わったんですかね。

参考：`require': cannot load such file -- active_support/testing/method_call_assertions (LoadError) · Issue #24008 · rails/rails