In many of my models, I have callback methods like this:
class MyModel < ActiveRecord::Base
before_save :do_something
def do_something
some code here...
end
end
The do_something method is a public method that is sometimes called on its
own, and also called whenever the model is saved. Let's say there are six
specs that are required to fully test the do_something method. What is
considered best practice for how the before_save filter should be tested?
If I say that I'm only ever going to test the behavior, it means that I need
to basically rewrite those six specs to make sure they hold whenever the
model is saved, as well as when the do_something method is called
explicitly. I don't like having to repeat myself this way, particularly
considering that a model may have multiple callbacks like this so I end up
having to repeat myself a lot. The alternative is to just do something
like:
x = MyModel.new
x.should_receive(:do_something)
x.save
But of course this tests implementation rather than behavior which is
usually not desirable. But in this situation I'm tending to prefer it over
having to do a ton of rewriting of specs. What are others' thoughts on
this?
Thanks..
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