Faking FS in specs

Testing RSpec
1

Hi *, for some reasons I’m not able to fake writing on the FS during
specs with carrierwave, someone managed to make it work ?
I’m currently trying to use FakeFS, but apparently I’m not even able to
run specs after changing spec_helper. The exception it raises is:

/Users/ngw/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/pathname.rb:446:in
realpath': undefined methodrealpath’ for FakeFS::File:Class
(NoMethodError)

Is it a problem with my version of Ruby ? If it is, how do I test this
stuff ? It’s very annoying to have the files saved in /public for every
autotest I run …

TIA,
ngw

2

How are you requiring FakeFS?

Scott

3

hi Scott, thanks for the answer.

I’m not even calling it inside the specs.

ngw

4

On Sun, Mar 13, 2011 at 10:30 AM, Nicholas W. [email protected]
wrote:

Hi *, for some reasons I’m not able to fake writing on the FS during specs with
carrierwave, someone managed to make it work ?
I’m currently trying to use FakeFS, but apparently I’m not even able to run
specs after changing spec_helper. The exception it raises is:

An alternative you might try is Construct:

We created it at Devver because we had trouble with libraries like
FakeFS. Instead of faking out the FS, it simply gives you tools to set
up the needed file structures and then automatically clean them up
when the test is done.

5

I think the problem is a missing API in FakeFS:

http://rubydoc.info/gems/fakefs/0.3.1/FakeFS/File
http://www.ruby-doc.org/core/classes/File.html#M000024

On Mar 13, 2011, at 2:37 PM, Nicholas W. wrote:

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Cheers,
David

6

Agreed with David - it simply hasn’t been implemented in FakeFS.

I’m actually a maintainer on the project, but don’t have any steam to
work on it right now. I’d certainly apply patches, though.

FakeFS is a project of gradual enhancement, so even a patch that doesn’t
respect all of the arguments / features of File.realpath is OK. We can
always fix it / improve it later.

Cheers,

Scott

7

On 13 Mar 2011, at 22:05, Avdi G. wrote:

On Sun, Mar 13, 2011 at 10:30 AM, Nicholas W. [email protected] wrote:

Hi *, for some reasons I’m not able to fake writing on the FS during specs with
carrierwave, someone managed to make it work ?
I’m currently trying to use FakeFS, but apparently I’m not even able to run
specs after changing spec_helper. The exception it raises is:

An alternative you might try is Construct: GitHub - devver/construct: DO NOT USE: No longer maintained, TestConstruct is revived at bhb/test_construct https://github.com/bhb/test_construct

We created it at Devver because we had trouble with libraries like
FakeFS. Instead of faking out the FS, it simply gives you tools to set
up the needed file structures and then automatically clean them up
when the test is done.

I wonder if you could similarly use Aruba’s library for that in RSpec.
It might need some tweaks.

–
Avdi G.
http://avdi.org

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cheers,
Matt

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07974 430184