Hi Matt
Thank you for your reply!
I mock things like FileUtils for the following reasons: to avoid testing
FileUtils which I reckon has its own test suite and to avoid doing potentially
harmful things locally or having specs fail because of insufficient permissions
etc. I know the last bit could be worked out, but for things like #rm_r I do
like just to mock them.
Please let me know if this is not best practice. I know one can "over-mock" a
spec suite, but I generally tend to mock things that are tested/spec'ed
themselves.
Mvh
Morten Møller Riis
On Dec 5, 2011, at 3:39 PM, Matt Wynne wrote:
>
> On 5 Dec 2011, at 12:04, Morten Møller Riis wrote:
>
>> Hi folks
>>
>> How would you spec something like this:
>>
>> as_user username do
>> FileUtils.chmod_R 0755, "#{directory}/*"
>> end
>>
>> Where as_user fires off a new process (and set uid to username).
>>
>> It seems that this won't catch FileUtils.chmod_R:
>>
>> FileUtils.should_receive(:chmod_R).with(0755, "#{@domain.directory}/*")
>>
>> I guess that is because it is passed in the block and fired off in a
>> seperate process (Process.fork).
>
>
> It depends on what you want to prove.
>
> If you want to prove that this bit of code will set the actual flags on the
> actual file, then why not let it do it, and then check that the file ends up
> how you want it to? If it's happening in a forked process, you'll need to
> wait for the process to close to be sure it's done, but otherwise that should
> be quite straightforward, and will give you confidence that the whole thing
> is working.
>
> Otherwise, you need to put a layer around the whole detail of forking and
> running the FileUtils command, and put your mock assertion against that
> layer. Right now you're trying to introduce your mock into the stuff that
> happens in the forked process, which isn't going to work.
>
> cheers,
> Matt
>
> --
> Freelance programmer & coach
> Author, http://pragprog.com/book/hwcuc/the-cucumber-book (with Aslak Hellesøy)
> Founder, http://relishapp.com
> +44(0)7974430184 | http://twitter.com/mattwynne
>
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