After a bit of a run-around this morning trying to get unit testing working (see #766), I wanted to help clean up the documentation and make it very clear what needs to be done to get unit tests working in a local copy of the repository.
Draw more attention to the fact that contributors will need to run `c…
…omposer install` and PHPUnit from *within the PHP_CodeSniffer* repository.
Update the anchor for installation instructions in the README file
Rewrite the top half of the Unit Testing section of the contributing …
…doc, encouraging Composer installation (with --prefer-source)
I've never actually thought about just using the dependency version of PHPCS for running tests / submitting PRs upstream to PHPCS itself.
This is only valid if your preferred method of installation is Composer. The PEAR install comes with the test suite already and if you also develop for PHPCS itself, you probably have a stand-alone PHPCS git clone somewhere which comes with the test suite as well.