Error message of "rake" command：「`block in non_options': file not found: environment (ArgumentError)」

在前一篇有使用到了 shoulda 這個 gem lib 來幫助測試。Shoulda 有一個 open issue 是尚未解決的，這個 bug 會使得執行 rake 相關指令時出現下列錯誤訊息：

$ rake environment

/Users/<username>/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:167:in `block in non_options': file not found: routes (ArgumentError)
 from /Users/<username>/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:146:in `map!'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:146:in `non_options'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:207:in `non_options'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:52:in `process_args'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:891:in `_run'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/minitest/unit.rb:884:in `run'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:21:in `run'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:326:in `block (2 levels) in autorun'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:27:in `run_once'
 from /Users/<username>
/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/test/unit.rb:325:in `block in autorun' 

Shoulda 很久沒人維護了～

建議把 shoulda 依需求換成 shoulda-matchers 或者 shoulda-contex 即可解決這個問題 

Shoulda 最後也就是用了 shoulda-matchers 或 shoulda-context，可以就直接使用原本的 gem