但是我感觉即使Rails内置了多达三个层次上的测试手段(基本对应MVC三层),面对那些鬼斧神工般的class_eval和monkey patch还是有些力不从心,需要更智能的覆盖测试工具。我一直很喜欢Matz说过的Ruby设计哲学:A sharp knife may cut your fingers, but it's better than a dull one.
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Given that Rails reloads modules on change you can never tell which module is loaded first.Also, since we have autoloading only in development we kind of develop our code in one environment but users execute it in a different one on a server in production. Which may be inconsistent....
as well as an error that came frommkdirboth suggest incorrect permissions. If you are on OSX user this is probably due to the inappropriate use of sudo. OSX by convention doesn't use sudo for much of any CLI installation unless you are using Macports ...
between them arise from the libraries they have for higher-end tasks. Python is the older language and thus has useful and mature libraries – such as SciPy and NTLK – that I don't see a good alternative for in Ruby. But Ruby has Ruby on Rails, which has been the hot web framework...