Dependency injection is not a virtue in Ruby (DHH)

By David Heinemeier Hansson on Jan 6, 2013 In languages less open than Ruby, hard-coded class references can make testing tough. If your Java code has Date date = new Date(); buried in its guts, how do you set it to a known value you can then compare against in your tests? Well, you don't. So what you do instead is pass in the date as part of the parameters to your method. You inject the dependenc

[iakio]

new Date()を避けるためだけにDIじゃないし、DIがdesign for APIのためのものともいえる。じっくり考えたい

[joltkun]

“If your code never knows exactly who it's talking to, it can talk to anyone! Testing stubs, mocks, and future collaborators. Hogwash.”

[koheisg]

ruby DI話2

[iR3]

DIって2004年の話題だなぁ（懐かしい目）http://goo.gl/CJUjr

[katzchang]

テストのために日付クラスを注入する？Rubyなら標準クラスをいじればいいよね、言語によって変わるよね、という話。

[t-wada]

DHH が DI (Dependency Injection) に対する意見を述べている。言語の柔らかさと思考の関係。