Missing Ability specs on Comments.

[zsombor]

@mezis here are your Ability specs on Comments, fixes #200. My previous #108 did not add any new ability constraints having merely reused the existing code that turned out to be untested.

I feel that adding tests on a lower model level is generally preferable to integration or controller specs. Especially when possible :-)

[mezis]

👍 and thanks for the reference to Joseph Fourier!

existing code that turned out to be untested

I'm definitely to blame here. Shouldn't have written most of this in such a hurry ^_^

[zsombor]

OOPS I broke the build on Travis. Seems to work fine locally. Will look into this before closing.

[mezis]

Ah, the downside of using fixtures. I'll wait for the build to merge.

[mezis]

Thanks @zsombor!