David Chelimsky-2 wrote:
>
>
> Here are some interesting thoughts on that:
>
> http://blog.jayfields.com/2006/12/rails-unit-testing-activerecord.html
>
> Just apply the same thinking to rspec.
>
>
Thanks for the pointer, here's what I've done:
In spec_helper.rb:
class << ActiveRecord::Base
def source_file
File.expand_path("#{RAILS_ROOT}/app/models/#{self.name.underscore}.rb")
end
end
(I preferred source_file to standard_path - seemed more descriptive)
An then my specification looks like this:
it "should validate that the postcode is correctly formatted" do
Location.should_receive(:validates_as_uk_postcode).once.with(:post_code)
load Location.source_file
end
That works nicely.
I suppose the downside is it allows implementation to creep into the specs
but if it saves me having to re-test somebody else's code I can live with
it!
I also looked at
http://spicycode.com/2007/4/2/rspec-expecation-matchers-part-ii SpicyCode's
RSpec extensions - the approach here appears to be similar to the code in
my original example as it tests validation with a single invalid example and
if that returns the expected result then assumes the validation will work
for all invalid examples (I may be doing it a disservice here as I've only
quickly looked at the source code). This still leaks implementation into the
specs and I think I prefer the Jay Fields approach as it, in my opinion,
more clearly specifies the expected behaviour of the model.
Thanks again,
Rob
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