Add unit tests for json index methods in Package_PHP_Web

[lhsazevedo]

This issue is specifically to add the first unit tests for the Package_PHP_Web class, which currently have no test coverage, focusing on the writeJsonIndex and processJsonIndex methods.

A follow-up issue should be created to address unit tests for the remaining methods.

[lhsazevedo]

@haszi Please assign me

[lhsazevedo]

Context: #160 (review)

[lhsazevedo]

Hi @haszi

I declared these methods as private, which makes it a bit tricky to hook into them using the existing approach of extending classes (i.e. Test*.php classes in phpdotnet/phd).

Would it be okay to extract this JSON index behavior into a dedicated class and just test it directly? Or would you prefer that I find a way to maintain the current strategy of test subject extension?

[lhsazevedo]

ping @haszi @Girgias

[Girgias]

Sorry, I think extracting the index into a dedicated class makes sense.