Ruby on Rails

Matthew Riley wrote in post #1141041:
> I understand the code is not specific to Rails, however I am
> specifically
> interested in Rails developer's perspective. Thanks!

Perspective on what? As you demonstrate, Dependency Injection (DI) is a
really simple concept, with a really simple implementation, in dynamic
("Duck Typed") languages like Ruby.

Are you asking to verify what you have shown is "Dependency
Inject/Inversion of Control?" If so then sure it is.

Are you asking if Rails developers spend a lot of time worrying about
"Dependency Injection" or creating elaborate frameworks to support DI?
That would be a pretty resounding "NO".

Given that a high percentage of DI usage is related to testability, it
might do you good to look at one of the popular testing frameworks used
by Rails developers, for example:

https://github.com/rspec/rspec

You won't see a lot of talk in there about DI or IoC mumbo-jumbo. You'll
see the stuff that's actually important, like test doubles, mocks,
stubs, etc. Ruby is a dynamically typed language without all those pesky
static type dependencies. Take advantage of that in whatever way makes
sense.

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