Add phpdbg check to builds

[dxops]

Works much faster, on big codebase it's better to use phpdbg instead of xdebug

phpdbg -qrr bin/phpunit --testsuite=unit  --coverage-text

[Jean85]

It's already supported! The only thing that you have to do is have the PHPDBG binary available in your environment, and disable xdebug (to avoid excessive memory consumption).

I've already amended the docs to mention this: http://engineering.facile.it/paraunit/documentation/#coverage-command

[dxops]

Thanks, I saw it right after issue created. Should we use it on travis?

[Jean85]

Do you mean to collect coverage for your own project? Or for Paraunit itself?

[dxops]

Both ways should be checked continuously

[Jean85]

With Paraunit it's checked at startup, and it writes it too after the title; in Travis, I think I will add it, if PHPDBG is present or it's fast to install.

[Jean85]

I've tried to add it on Travis and failed, PHPDBG is not present there, due to travis-ci/travis-ci/issues/6323

[dxops]

We can use it for php7 only. The main goal is to make sure it works

[Jean85]

It's not there, no matter PHP version. So:

• I cannot use it to collect Paraunit's coverage, until the referred issue is solved on Travis
• I don't have a test that uses PHPDBG directly to test the collection of the coverage: I shouldn't test if the PHPDBG coverage driver works, that's on php-code-coverage's testsuite