Thursday, March 27, 2014
Hi Dave, thanks for taking the time to respond.
Example 2:
On Thursday, 27 March 2014 02:45:53 UTC+11, Dave Aronson wrote:
-- Of the two examples below, which do you believe is more testable?
Example 1:
class Car
def initialise(engine)
@engine = engine
end
def start
@engine.start
end
end
def initialise(engine)
@engine = engine
end
def start
@engine.start
end
end
Example 2:
class Car
def initialise
@engine = Engine.new
end
def start
@engine.start
end
end
def initialise
@engine = Engine.new
end
def start
@engine.start
end
end
On Thursday, 27 March 2014 02:45:53 UTC+11, Dave Aronson wrote:
On Wed, Mar 26, 2014 at 10:32 AM, masta Blasta <li...@ruby-forum.com> wrote:
> If only the engine class has a method
> called 'start' then Car is effectively coupled to Engine.
Since one could theoretically create another class that supports
#start (and your later examples of #gear_up and #stop, probably
delegating #gear_up to a Transmission-like class), I think it's still
effectively decoupled. In particular, when *testing* the Car, one
could create it with a MockEngine that's only used in the tests.
--
Dave Aronson, freelance software developer (details @ www.Codosaur.us);
see also www.PullRequestRoulette.com, Blog.Codosaur.us, www.Dare2XL.com
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