We all know Drupal and Symfony do have multilingual support (i18n, l10n, pluralization). But do they match? Or do they equally well? How does one test this? This is what I did.

I wanted to add tests for Symfonfy's PluralizationRules as there were none and I wanted to have support for PluralForms loading Drupals *.po files clean and simple. How hard can it be?!?

These tests should cover:

1. Langcodes. Are all known language codes available (or easy to add)?
2. Parsing Gettext PluralForm rules like